Multi-Element Lenses - TSUKASA TEC

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IntroMulti-Element LensesMulti-Element Overview . . . . . . . . 128

Achromats

425-675nm Cemented Doublets . 132

425-675nm Fast Achromats . . . . . 133

1064/633nm Air-Spaced . . . . . . 134

1064/532nm Air-Spaced . . . . . . 135

Aplanats

Visible . . . . . . . . . . . . . . . . . . . . 136

Meniscus Lenses . . . . . . . . . . . . 137

High Energy / UV. . . . . . . . . . . . 138

UV Meniscus . . . . . . . . . . . . . . . 139

UV Focusing Lenses . . . . . . . . . . . . 140

Excimer Laser Focusing Lenses . . . . 140

UV Objective Lenses . . . . . . . . . . . 141

F-Theta Lenses . . . . . . . . . . . . . . . . 142

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http://www.cvilaser.com

128 Americas (505) 296-9541 | Europe +44 (0) 1624 647000 | Asia +82 (0) 32 673-6114 | Order now at www.cvilaser.com

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Figure 2.

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strictly referenced to optical surfaces are

required. The logical choice is to use the

back focal distances:

Thus we have

d = BFDp + BFDn = |BFDp| - |BFDn|

The reader may notice that the equation

above is actually not consistent with our

definitions when the direction of the light

rays is considered. Strictly speaking, it

is the front focal distance of the positive

element that is required in the formula

Multi-Element Lenses

CVI Multi-Element Lenses

A multi-element lens system is required

when the aberrations of a singlet lens are

too large to satisfy system requirements.

CVI offers two and three element lenses

for use at focal ratios where singlets fail

due to spherical aberration. CVI multi-

element lenses with diffraction limited

f/numbers down to 3.3 are summarized in

the table to the right.

Nomenclature

As with a singlet, the back focal distance

BFD is the signed distance (distance

noted with negative or positive value

depending on whether it is positive or

negative focal length) from the rear vertex

to the back paraxial focal plane. This is

shown in Figure 1 below for a positive

triplet.

For a negative lens, Figure 2, the BFD is

negative and is calculated using the same

rule. The BFD is the distance from the

back vertex to the (virtual) back paraxial

above. However, it is customary to list

the back focal distance of a lens as the

distance from its last element to the focal

plane when the lens is properly oriented for

focusing a collimated beam from left to right.

So, to design a system using lens tabulated

values, keep in mind the orientation

conventions used in the descriptions of the

individual component lenses.

The working distance of elements in

housings has been provided in the product

tables. The working distance specifies

the distance from the focal plane to a

mechanical reference surface - here it

is the housing edge closest to the focal

plane. This is shown schematically in

Figure 4 below:

The advantage of a consistent formalism is

evident in the construction of a Galilean

beam expander, Figure 3. Here, both the

negative and positive elements will have

a common focus as shown. To determine

the spacing of the elements, distances

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Figure 3.

Figure 4.

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signs around the BFD in Figure 2 to

emphasize this.

Technical Notes

Product No. of Wavelength Code Elements f/# Range

Monochromats

LAP Laser Aplanat (Positive) 2 5 420 - 2000nm

LAPQ UV Laser Aplanat (Positive) 2 5 180 - 2200nm

LAN Laser Aplanat (Negative) 2 5 420 - 2000nm

LANQ UV Laser Aplanat (Negative) 2 5 180 - 2200nm

LAP + APM Laser Aplanat + Aplanatic Meniscus 3 3.3 420 - 2000nm

LAPQ + APMQ UV Laser Aplanat + UV Aplanatic Meniscus 3 3.3 180 - 2200nm

UVAP UV Laser Aplanat 1 8-15 180 - 2200nm

2 5-10 180 - 2200nm

3 2.5 180 - 2200nm

Achromats

HAP Nd:YAG / HeNe Achromat (Positive) 3 4 600 - 1300nm

HAN Nd:YAG / HeNe Achromat (Negative) 3 4 600 - 1300nm

YAP Nd:YAG / Doubled Nd:YAG Achromat (Positive) 3 4 532 - 1300nm

YAN Nd:YAG / Doubled Nd:YAG Achromat (Negative) 3 4 532 - 1300nm

AAP Aplanatic Achromat (Cemented) 2 4 400 - 750nm



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Multi-Element Lenses

Aplanat or Achromat?

An Aplanat lens is designed to be free of

two monochromatic (single wavelength)

wavefront errors called Spherical Aberration

and Coma. Spherical Aberration is axially

symmetric and occurs when rays from

a point on the axis passing through the

outer zones of the lens focus at a different

distance from the lens than rays passing

through the central zone. Coma is an off-

axis non-symmetric wavefront distortion

which increases linearly with field angle

or distance from the principal axis. In

combination, these aberrations distort the

transmitted wavefront through the lens and

cause the focal spot to become irregularly

shaped and/or blurred.

On the other hand, Achromatic lenses are

corrected for Chromatic Aberration with

respect to two wavelengths (normally

blue and red). Chromatic aberration is

produced by dispersion, or the variation

of refractive index with wavelength,

and causes different wavelengths to

have different focal points. Using

separate materials like crown glass

and flint glass for the converging and

diverging lens elements, the dispersion

of each can be compensated for by

the other thereby minimizing the total

effect. In photography and precision

micromachining, it is often crucial that the

secondary spectrum or a third wavelength

be color-corrected in addition to the blue

(F-line) and red (C-line).

Neither crown nor flint glasses transmit

well below 420nm so other materials are

required for applications using broadband

or multi-wavelength UV sources. there are

few options available to optical designers,

due to limitations in UV transmitting

materials. Existing designs use fused silica

glass for the positive element, and either

UV grade calcium fluoride or lithium

fluoride for the negative element. An UV

achromat comprised of either of these

material combinations can be optimized

for a 200nm bandwidth centered around

300nm or 350nm depending on the

application requirements.

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Aplanat Marking Conventions

Positive Systems (Convergent)

The arrow marking on the housing

always points to the collimated light.

Negative Systems (Divergent)

The arrow marking on the housing

always points to the collimated light.

UV achromats are ideally suited to

broadband UV applications including

photometric instrumentation and

fluorescence analysis. They can also be

used as UV focusing lenses in place of

aplanat lenses in certain situations. Most

commercially available UV aplanats are

designed for 248nm. At other wavelengths,

such as the laser diodes at 365nm (I line)

and 405nm (H line) used in lithography

exposure systems, more precise focal

lengths may result from using an achromat

in place of an aplanat which was designed

for a different wavelength.

LAP/LAN Series Laser Aplanats

The LAP/LAN Series Laser Aplanats are

air-spaced doublets designed to produce

minimum focal spot size. An aplanat is

a lens designed to minimize spherical

aberration and coma. The LAP/LAN Series

lenses exhibit essentially diffraction limited

performance over their full f/5 apertures.

Use LAP/LAN doublets when the focal

spot of a monochromatic laser must be

an absolute minimum. Applications

include nonlinear optics experiments,

laser beam expanders and collimators,

interferometers, beam handling systems,

material ablation and cutting systems,

power fiber optic interfacing, and other

applications where lenses are used to

focus collimated beams.

Figure 5 shows the construction of the LAP

Series positive lenses; identical definitions

apply to the LAN Series negative lenses.

Both elements are fabricated from SF11

glass and are antireflection coated with

hard, damage resistant coatings. Lens

design prescriptions are available in many

of the commercially available optical

design software packages to facilitate

computer analysis, such as ZEMAX.

Technical Notes




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aplanatic meniscus lens to shorten the

focal length by a factor of 0.67 to create

a combined system of f/3.3 relative

aperture.

LAPQ and LANQ are positive and negative

diffraction limited aplanats optimized for

248 nm. The “Q” designates UV grade

fused quartz used in place of SF11.

APM Series Aplanatic Meniscus Lenses

The CVI APM or APMQ Series aplanatic

meniscus lenses shorten the focal length

of the LAP or LAPQ Series positive

laser aplanats while maintaining the

minimization of the aberrations inherent in

the LAP or LAPQ Series lenses. An

LAP/APM or LAPQ/APMQ combination

is an f/3.3 focal system made up of

reasonably priced standard components.

The APM lens acts to shorten the

combined focal length of the system

without introducing additional coma or

spherical aberration. The resulting focal

length obtained is always:

where n is the index of refraction of the

meniscus element. To introduce no

spherical aberration or coma, the APM

lens design must be matched to the

spherical wavefront generated by the

preceding LAP lens. This requirement

determines the front and back radii and

center thickness of the meniscus lens.

Also, the APM lens must be properly

spaced from its companion laser aplanat.

Therefore, APM and LAP lenses are used

in pairs, Figure 9. CVI provides each

APM lens pre-mounted in a housing that

assures proper spacing and orientation

with its paired LAP lens. APM lenses can

Figures 6 through 8 show the degree of

design correction that has been achieved

for LAP-100-20. The peak-to-valley

wavefront distortion is shown on the axis

at three wavelengths. The X-axes span

the ± 10mm clear aperture for rays above

and below the optical axis. Note that

for each wavelength, the lens has been

refocused to find the focal plane where

the optical path difference (OPD) spread

is a minimum. The BFD of this focal plane

is given.

The graphs show that the theoretical

deviation from a perfect spherical

wavefront centered on the point of

best focus is negligible. CVI guarantees

less than λ/4 peak-to-valley wavefront

distortion for all elements of the LAP/LAN

Series. This means that the energy falling

within a theoretical circle co-incident

with the minimum of the first dark ring of

the Airy diffraction pattern will contain

at least 80% of the energy contained

in the corresponding region of an ideal

diffraction pattern.

The LAP Series positive aplanats have

relative apertures of f/5. If you require

a smaller spot size, add an APM Series

fcombination =f initial

n

Figure 8. LAP-100.0-20.0 with BFD = 99.71mm and λ = 1064nm

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Figure 5. Laser Aplanat

Multi-Element LensesTechnical Notes




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they are air-spaced, they can be used in

high power YAG applications. The coatings

are designed to give reflection losses of

less than 0.5% per surface at both 1064nm

and 633nm. Uncoated reflections can

be as much as 4% per surface on BK7

elements and 8% per surface on SF11

elements.

To compare the performance of these

lenses with that of telescope objectives,

one can ray-trace representative telescopes

consisting of two CVI cemented aplanats

and two high power achromats. The high

power achromats offer better wavefront

quality and achromatization at two useful

laser wavelengths. The inner surfaces are

air-spaced and coated with high efficiency

anti-reflection coatings and are suitable for

high power applications that would cause

telescope objectives to fail.

YAG/Doubled YAG Achromats

These lenses are similar to the HAP/HAN

Series except they are achromatized for

1064nm and 532nm. They are air-spaced

and all surfaces are coated with double-V

AR coatings that have anti-reflection of

less than 0.6% per surfaceat both 1064nm

and 532nm. These lenses can be used to

focus YAG and doubled YAG beams simul-

taneously or to form a beam expander that

is concurrently collimated for YAG and

doubled YAG.

A cross section of the YAP-100.0-20.0 is

shown in Figure 11. Figure 12 shows the

OPD fans for this lens at the best common

focus. Both wavelengths are theoretically

less than λ/20 peak-to-valley transmitted

wavefront distortion. These lenses are

diffraction limited at 1064nm and 532nm.

be ordered with their companion laser

aplanats or separately. This gives you the

ability to change the focal length of an

existing system at a later time.

UVAP UV and Excimer Laser

Focusing Lenses

CVI designed the UVAP Series to

focus large aperture excimer beams

and for general purpose ultraviolet

focusing applications. The UVAP

Series has optimum correction of

spherical aberration and coma in a lens

transmitting to 200nm. Choose lenses

from this series whenever your application

requires ultraviolet diffraction limited

performance at modest f/numbers.

Lenses from the UVAP Series can satisfy

many requirements in photoablation,

microlithography, and image relay

applications without the need for

expensive custom designs.

YAG/HeNe Achromats

These air-spaced triplets have the same

focal length at 1064nm and 633nm. They

can be used to focus a YAG beam and

HeNe beam to align to the same point.

They can also be used to form beam

expanders that collimate YAG and HeNe

beams at the same lens spacing.

These lenses are corrected for spherical

aberration at 1064nm and 633nm and for

coma at 1064nm (see Figure 10). Because

Figure 10. HAP-100.0-20.0 OPD fan

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Figure 12. YAP-100.0-20.0 OPD fan

Figure 11. YAP-100.0-20.0

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Figure 9. The LAP lens is inserted into the housing of the APM companion meniscus lens.

Multi-Element LensesTechnical Notes




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Focal lengths from 25mm to 2000mm CVI low loss 425-675nm BBAR

coating included l 46-49 See HAP/HAN or YAP/YAN for

1064nm air-spaced designs l 134

AAP, AAN

Substrate Material BK7 and SF2, SF6, or SF11 glass

Surface Quality 40-20 per MIL-PRF-13830B

Diameter Tolerance ± 0.25mm

Clear Aperture Central 85% of diameter

Field of view 4°

Design Wavelength 500-620nm Visible

Transmitted Wavefront Distortion λ/2 p-v at 633nm

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AAP - Positive Cemented Doublet Achromat

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AAN - Negative Cemented Doublet Achromat

425-675nm Cemented Doublet Achromats

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Chromatic focal shift vs. wavelength for AAP-100.0-25.4 doublet achromat.

AAPAAN

425-675nm Cemented Doublet Achromats Focal Diameter Part Number Length D f/D

Positive Cemented Doublet Achromats

AAP-25.0-6.35 25.0 6.35 4.6

AAP-30.0-6.35 30.0 6.35 5.6

AAP-50.0-12.7 50.0 12.7 4.6

AAP-75.0-12.7 75.0 12.7 6.9

AAP-100.0-25.4 100.0 25.4 4.6

AAP-125.0-25.4 125.0 25.4 5.8

AAP-150.0-25.4 150.0 25.4 6.9

AAP-200.0-25.4 200.0 25.4 9.3

AAP-200.0-50.8 200.0 50.8 4.6

AAP-250.0-25.4 250.0 25.4 11.6

AAP-250.0-50.8 250.0 50.8 5.8

AAP-300.0-25.4 300.0 25.4 13.9

AAP-300.0-50.8 300.0 50.8 6.9

AAP-300.0-76.2 300.0 76.2 4.6

AAP-500.0-25.4 500.0 25.4 23.2

AAP-500.0-50.8 500.0 50.8 11.6

AAP-500.0-76.2 500.0 76.2 7.7

AAP-500.0-101.6 500.0 101.6 5.8

AAP-1000.0-25.4 1000.0 25.4 46.3

AAP-1000.0-50.8 1000.0 50.8 23.2

AAP-1000.0-76.2 1000.0 76.2 15.4

AAP-1000.0-101.6 1000.0 101.6 11.6

AAP-1500.0-25.4 1500.0 25.4 69.5

AAP-1500.0-50.8 1500.0 50.8 34.7

AAP-2000.0-25.4 2000.0 25.4 92.6

AAP-2000.0-50.8 2000.0 50.8 46.3

Negative Cemented Doublet Achromats

AAN-25.0-6.35 -25.0 6.35 3.9

AAN-30.0-6.35 -30.0 6.35 4.7

AAN-50.0-12.7 -50.0 12.7 3.9

AAN-75.0-12.7 -75.0 12.7 5.9Unless otherwise noted, all measurements in mm.

Antireflection Coating Ravg ≤ 0.5%, 425-675nm

Damage Threshold 500mJ/cm2, 20ns, 20Hz; 100W/cm2, CW at 515nm




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Application in fiber optic couplings Low f/# aplanatic achromat

positive lens system Infinite conjugate design CVI low loss 425-675nm

BBAR coating included l 46-49

FAP 425-675nm Fast Achromats

Substrate Material BK7 and SF2 glass

Design Wavelengths Visible (500-620nm)

Focal Length Tolerance ± 0.5%

Housing Black anodized aluminum barrel

Housing Tolerance ± 0.005”

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Chromatic focal shift vs. wavelength for FAP-100.0-46.0 fast achromat.

Product Code

Focal Length in mm

Clear Aperture Diameter in mm

Wavelength Range of AR Coating in nm

How To Order 425-67525.050.0FAP

Two air-spaced doublets make this

achromat ideal for fiber optic coupling

and similar applications where a very low

f/# is required. This fast achromat design

also minimizes spherical aberration and

coma. Vent holes can be placed in the

barrel between the doublets for vacuum

applications. Contact CVI for pricing and

delivery of custom features.

FAP

425-675nm Fast Achromats Focal Housing Housing BBAR Part Number Length f/# NA BFL WD Diameter Length Coating (nm) FAP-25.0-15.0-425-675 25.0 1.7 0.30 15.0 14.4 28.6 25.4 425-675

FAP-50.0-25.0-425-675 50.0 2.0 0.25 40.5 39.1 38.1 25.4 425-675

FAP-100.0-46.0-425-675 100.0 2.2 0.23 83.5 81.1 63.5 38.1 425-675

FAP-150.0-60.0-425-675 150.0 2.5 0.20 130.6 128.2 76.2 44.4 425-675Unless otherwise noted, all measurements in mm.

Antireflection Coating Ravg ≤ 0.5%, 425-675nm

Transmitted Wavefront Distortion λ/2 p-v at 633nm

Damage Threshold 500mJ/cm2, 20ns, 20Hz; 100W/cm2, CW at 1064nm




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Dual wavelength beamsteering applications

Same focal length for 1064nm and 633nm

Excellent achromatic performance for Ti:Sapphire at 800nm

Air-spaced design for high energy laser applications

All surfaces AR coated for both 1064nm and 633nm




HAP, HAN

HAP Series Positive Laser Achromats

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HAN Series Negative Laser Achromats

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1064/633nm Air-Spaced Laser Achromats

Chromatic focal shift vs. wavelength for HAN-50.0-10.0 1064/633 achromat.

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These air-spaced triplets have the same focal length at 1064nm and 633nm. They can be used to focus a Nd:YAG beam and HeNe beam to align to the same point. They can also be used to form beam expanders that collimate Nd:YAG and HeNe beams at the same lens spacing.

These lenses are corrected for spherical aberration at 1064nm and 633nm and

for coma at 1064nm. Because they are air-spaced, they can be used in high power Nd:YAG applications. The coatings are designed to give reflection losses of less than 0.5% per surface at 1064nm and 633nm.

To compare the performance of these lenses with that of telescope objectives, one can ray-trace representative telescopes consisting of two CVI cemented aplanats and two high power achromats. The high power achromats offer high wavefront quality and achromatization at two useful laser wavelengths. The inner surfaces are air-spaced and coated with high efficiency anti-reflection coatings and are suitable for high power applications that would cause telescope objectives to fail.

HAPHAN

1064/633nm Air-Spaced Laser Achromats Clear Working Back Focal Outside Focal Aperture Distance Distance Diameter Length Part Number Length CA WD BFD D L

Positive Achromats

HAP-10.0-2.0 10.0 2.0 7.0 7.7 12.7 4.3

HAP-15.0-3.0 15.0 3.0 10.0 11.7 12.7 11.4

HAP-25.0-5.0 25.0 5.0 20.6 21.6 19.0 8.0

HAP-50.0-10.0 50.0 10.0 41.0 45.7 19.0 11.8

HAP-75.0-15.0 75.0 15.0 64.0 68.7 25.4 14.7

HAP-100.0-20.0 100.0 20.0 89.0 93.5 28.6 14.4

HAP-125.0-25.0 125.0 25.0 112.0 119.4 31.8 19.0

HAP-150.0-30.0 150.0 30.0 135.0 143.1 40.6 19.0

HAP-200.0-40.0 200.0 40.0 184.0 190.6 50.8 22.4

HAP-250.0-50.0 250.0 50.0 233.0 239.6 61.3 24.7

Negative Achromats

HAN-10.0-2.0 -10.0 2.0 12.0 -11.4 12.7 7.4

HAN-15.0-3.0 -15.0 3.0 18.0 -17.1 12.7 8.1

HAN-25.0-5.0 -25.0 5.0 30.0 -30.5 14.0 12.7

HAN-50.0-10.0 -50.0 10.0 57.0 -54.1 19.0 16.9Unless otherwise noted, all measurements in mm.

Antireflection Coating R ≤ 0.5% per surface at 1064nm and 633nm

Transmitted Wavefront Distortion λ/2 p-v over 85% of CA at 633nm

Damage Threshold 4J/cm2, 20ns, 20Hz at 1064nm




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IntroYAP, YAN 1064/532nm Air-Spaced Laser Achromats

Dual wavelength beamsteering applications

Same focal length for 1064nm and 532nm

Air-spaced design for high energy laser applications

All surfaces AR coated for both 1064nm and 532nm




YAP Series Positive Laser Achromats

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YAN Series Negative Laser Achromats

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Chromatic focal shift vs. wavelength for YAP-100.0-20.0 1064/532 achromat.

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These lenses are achromatized for

1064nm and 532nm. They are air-spaced

and all surfaces are coated with double-

V AR coatings that have anti-reflection

of less than 0.6% at both 1064nm and

532nm. These lenses can be used to

focus Nd:YAG and doubled Nd:YAG

beams simultaneously or to form a beam

expander that is concurrently collimated

for Nd:YAG and doubled Nd:YAG.

OPD shows the fans for this lens at the

best common focus. Both wavelengths are

theoretically less than λ/20 peak-to-valley

transmitted wavefront distortion.

YAPYAN

1064/532nm Air-Spaced Laser Achromats Clear Working Back Focal Outside Focal Aperture Distance Distance Diameter Length Part Number Length CA WD BFD D L

Positive Achromats

YAP-10.0-2.0 10.0 2.0 6.0 7.5 12.7 4.3

YAP-15.0-3.0 15.0 3.0 10.0 13.6 12.7 11.4

YAP-25.0-5.0 25.0 5.0 21.0 21.7 19.0 7.1

YAP-50.0-10.0 50.0 10.0 41.0 45.6 19.0 11.8

YAP-75.0-15.0 75.0 15.0 65.0 68.9 25.4 14.7

YAP-100.0-20.0 100.0 20.0 89.0 94.2 28.6 14.4

YAP-125.0-25.0 125.0 25.0 111.0 117.7 31.8 19.0

YAP-150.0-30.0 150.0 30.0 136.0 142.4 40.6 19.0

YAP-200.0-40.0 200.0 40.0 184.0 190.6 50.8 22.4

YAP-250.0-50.0 250.0 50.0 233.0 239.1 61.3 22.7

Negative Achromats

YAN-10.0-2.0 -10.0 2.0 12.0 -10.7 12.7 7.4

YAN-15.0-3.0 -15.0 3.0 16.0 -15.0 12.7 8.1

YAN-25.0-5.0 -25.0 5.0 28.0 -26.0 14.0 12.7

YAN-50.0-10.0 -50.0 10.0 55.0 -52.2 19.0 19.3Unless otherwise noted, all measurements in mm.

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Antireflection Coating R < 0.3% per surface at 1064nm and

R < 0.6% per surface at 532nm






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Visible Laser Aplanats

Substrate Material SF11 glass

Surface Quality All surfaces 40-20 per MIL-PRF-13830B except for

LAP-762.0-152.0, which is 60-40

Design Wavelength 633nm


LAP, LAN

Lens Part Number

Wavelength of AR Coating (nm) l 46-49

How To Order 1064LAP-125.0-25.0

LAN Series Negative Laser Aplanats

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LAP Series Positive Laser Aplanats

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Applications: Beam handling, interferometers, material ablation & cutting systems

Air-spaced design for medium to high energy applications

Diffraction limited performance

Aplanats correct for spherical aberration

and coma. The LAP and LAN are ideal for

general purpose use in the visible and near-

IR regions. For energies above 4J/cm2 or

for UV applications, the LAPQ and LANQ

are recommended. Parts are marked with

an arrow on the barrel that points to the

collimated light l 129. Other focal lengths

are available. Contact CVI for pricing and

delivery information.

LAPLAN

Visible Laser Aplanats Focal Clear Working Back Focal Outside Length Aperture Distance Distance Diameter Length Part Number at 633nm CA WD BFD D L

Positive Laser Aplanats

LAP-5.0-1.0 5.0 1.0 3.5 3.8 10.2 6.5

LAP-10.0-2.0 10.0 2.0 8.0 8.7 10.2 7.2

LAP-15.0-3.0 15.0 3.0 10.0 13.7 12.7 8.2

LAP-25.0-5.0 25.0 5.0 11.0 23.0 12.7 7.8

LAP-50.0-10.0 50.0 10.0 38.4 47.8 19.0 12.7

LAP-75.0-15.0 75.0 15.0 63.5 72.5 25.4 11.8

LAP-100.0-20.0 100.0 20.0 90.4 96.5 28.6 12.7

LAP-125.0-25.0 125.0 25.0 112.0 120.1 34.9 19.1

LAP-150.0-30.0 150.0 30.0 141.7 145.4 38.1 14.7

LAP-200.0-40.0 200.0 40.0 187.2 193.0 50.8 20.3

LAP-250.0-50.0 250.0 50.0 236.2 242.0 63.5 25.4

LAP-300.0-60.0 300.0 60.0 280.0 291.2 76.2 25.4

LAP-500.0-100.0 500.0 100.0 486.0 491.9 114.3 29.0

Negative Laser Aplanats

LAN-5.0-1.0 -5.0 1.0 7.9 -6.5 12.7 6.4

LAN-10.0-2.0 -10.0 2.0 1.1 -11.6 12.7 6.4

LAN-15.0-3.0 -15.0 3.0 7.2 -17.1 12.7 8.1

LAN-25.0-5.0 -25.0 5.0 16.2 -26.7 12.7 8.8

LAN-50.0-10.0 -50.0 10.0 34.7 -53.3 19.1 12.7Unless otherwise noted, all measurements in mm.

Antireflection Coating R ≤ 0.25% per surface, user specified






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Use in combination with LAP to obtain f/3.3 relative aperture

Air-spaced design for medium to high energy VIS-NIR laser applications

Mounts easily into 200-1.25 mirror mount, call for details

APM Aplanatic Meniscus Lenses

Substrate Material BK7 glass




Lens Part Number


How To Order 1064APM-150.0-30.0

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The CVI APM Series aplanatic meniscus

lenses shorten the focal length of the

LAP Series positive laser aplanats while

maintaining the minimization of the

aberrations inherent in the LAP Series

lenses. An LAP/APM combination is an

f/3.3 focal system made up of reasonably

priced standard components.

The APM lens acts to shorten the combined

focal length of the system without

introducing additional coma or spherical

aberration. To introduce no spherical

aberration or coma, the APM lens design

must be matched to the spherical wavefront

generated by the preceding LAP lens. This

requirement determines the front and back

radii and center thickness of the meniscus

lens. Also, the APM lens must be properly


Therefore, APM and LAP lenses are used

in pairs. CVI provides each APM lens pre-

mounted in a housing that assures proper

spacing and orientation with its paired

LAP lens. APM lenses can be ordered

with their companion laser aplanats or

separately. This gives you the ability to

change the focal length of an existing

system at a later time.

Aplanatic Meniscus Lenses Combined Clear Working Outside Companion Focal Aperture Distance Combined Diameter Length Part Number Laser Aplanatic Length CA WD BFD D L

APM-50.0-10.0 LAP-50.0-10.0 33.0 10.0 20.7 25.0 24.4 21.6

APM-75.0-15.0 LAP-75.0-15.0 51.0 15.0 35.0 41.6 31.7 25.4

APM-100.0-20.0 LAP-100.0-20.0 66.0 20.0 45.4 50.7 35.5 25.4

APM-125.0-25.0 LAP-125.0-25.0 83.0 25.0 61.8 69.0 38.1 31.8

APM-150.0-30.0 LAP-150.0-30.0 99.0 30.0 80.2 87.1 43.8 31.8

APM-200.0-40.0 LAP-200.0-40.0 132.0 40.0 109.6 114.9 57.2 38.1

APM-250.0-50.0 LAP-250.0-50.0 166.0 50.0 137.0 144.1 69.2 47.0

APM-300.0-60.0 LAP-300.0-60.0 198.0 60.0 163.2 168.8 82.5 49.5

APM-500.0-100.0 LAP-500.0-100.0 333.0 100.0 294.8 305.4 120.0 60.3

Unless otherwise noted, all measurements in mm.

APM







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LANQ Negative High Energy / UV Laser Aplanats

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LAPQ Positive High Energy / UV Laser Aplanats

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Beam handling, interferometers, material ablation & cutting systems

Air-spaced fused silica design for high energy or UV applications

Diffraction limited aplanats corrected for spherical aberration and coma

High Energy / UV Laser Aplanats

Substrate Material UV grade fused silica

Surface Quality All surfaces 10-5 CVI Laser Quality defined on page 430



LAPQ, LANQ

Lens Part Number


248 257 266 308 325 355 1064

How To Order 248LAPQ-5.0-1.0

Also used as excimer focusing lenses,

aplanats correct for spherical aberration

and coma. Air-spaced fused silica design

provides for significantly higher energy

damage threshold performance. Parts

are marked with an arrow on the barrel

that points to the collimated light l 129.

Other focal lengths are available. Contact

CVI for pricing and delivery infromation.

LAPQLANQ

High Energy / UV Laser Aplanats Focal Focal Clear Working Back Focal Outside Length Length Aperture Distance Distance Diameter Length Part Number at 248nm at 1064nm CA WD BFD D L

Positive UV Laser Aplanats

LAPQ-5.0-1.0 5.0 5.6 1.0 3.3 3.7 10.2 6.5

LAPQ-10.0-2.0 10.0 11.4 2.0 8.7 8.8 10.2 7.2

LAPQ-15.0-3.0 15.0 17.0 3.0 14.4 15.4 12.7 8.2

LAPQ-25.0-5.0 25.0 28.3 5.0 21.7 22.7 12.7 7.8

LAPQ-50.0-10.0 50.0 56.7 10.0 46.7 47.7 19.0 12.7

LAPQ-75.0-15.0 75.0 84.9 15.0 70.0 71.1 25.4 11.8

LAPQ-100.0-20.0 100.0 113.1 20.0 95.0 96.5 28.6 12.7

LAPQ-125.0-25.0 125.0 141.3 25.0 118.0 120.1 34.9 19.1

LAPQ-150.0-30.0 150.0 169.6 30.0 142.0 145.0 38.1 14.7

LAPQ-200.0-40.0 200.0 226.1 40.0 190.0 192.2 50.8 20.3

LAPQ-250.0-50.0 250.0 282.6 50.0 228.0 230.3 63.5 25.4

LAPQ-300.0-60.0 300.0 339.2 60.0 285.0 289.9 76.2 25.4

LAPQ-500.0-100.0 500.0 565.3 100.0 480.0 485.0 114.3 29.0

Negative UV Laser Aplanats

LANQ-5.0-1.0 -5.0 -5.7 1.0 3.7 -6.4 12.7 6.4

LANQ-10.0-2.0 -10.0 -11.3 2.0 8.7 -11.4 12.7 6.4

LANQ-15.0-3.0 -15.0 -17.0 3.0 13.4 -16.6 12.7 8.1

LANQ-25.0-5.0 -25.0 -28.3 5.0 23.4 -26.6 12.7 8.8

LANQ-50.0-10.0 -50.0 -56.6 10.0 52.9 -58.9 19.1 12.7Unless otherwise noted, all measurements in mm.


Transmitted Wavefront Distortion λ/4 p-v over CA at 248nm





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Use in combination with LAPQ to obtain f/3.3 relative aperture

Air-spaced design for high power and UV laser applications

Excimer focusing triplet lens Mounts easily into 200-1.25 mirror

mount, call for details

APMQ UV Aplanatic Meniscus Lenses


Surface Quality 10-5 CVI Laser Quality defined on page 430


Housing Tolerance ± 0.005”�

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Lens Part Number


248 257 266 308 325 355 1064

How To Order 308APMQ-150.0-30.0

The CVI APMQ Series aplanatic meniscus

lenses shorten the focal length of the

LAPQ Series positive laser aplanats while

maintaining the minimization of the

aberrations inherent in the LAPQ Series

lenses. An LAPQ/APMQ combination is an

f/3.3 focal system made up of reasonably

priced standard components.

The APMQ lens acts to shorten the

combined focal length of the system

without introducing additional coma

or spherical aberration. To introduce

no spherical aberration or coma, the

APMQ lens design must be matched to

the spherical wavefront generated by the

preceding LAPQ lens. This requirement

determines the front and back radii and

center thickness of the meniscus lens.

Also, the APMQ lens must be properly


Therefore, APMQ and LAPQ lenses are

used in pairs. CVI provides each APMQ

lens pre-mounted in a housing that assures

proper spacing and orientation with its

paired LAPQ lens. APMQ lenses can

be ordered with their companion laser

aplanats or separately. This gives you the

ability to change the focal length of an

existing system at a later time.

UV Aplanatic Meniscus Lenses Combined Clear Working Outside Companion Focal Aperture Distance Combined Diameter Length Part Number Laser Aplanatic Length CA WD BFD D L

APMQ-50.0-10.0 LAPQ-50.0-10.0 33.0 10.0 20.5 24.8 24.4 21.6

APMQ-75.0-15.0 LAPQ-75.0-15.0 49.0 15.0 31.8 40.5 31.8 25.4

APMQ-100.0-20.0 LAPQ-100.0-20.0 66.0 20.0 48.3 52.7 35.6 26.7

APMQ-125.0-20.0 LAPQ-125.0-20.0 82.0 25.0 60.9 69.0 38.1 31.8

APMQ-150.0-30.0 LAPQ-150.0-30.0 99.5 30.0 92.0 99.5 43.8 31.8

APMQ-200.0-40.0 LAPQ-200.0-40.0 129.0 40.0 105.4 113.0 57.2 38.1

APMQ-250.0-50.0 LAPQ-250.0-50.0 163.0 50.0 133.5 141.0 69.2 47.0

APMQ-300.0-60.0 LAPQ-300.0-60.0 192.0 60.0 165.5 173.0 82.5 63.0

APMQ-500.0-100.0 LAPQ-500.0-100.0 280.3 85.0 242.0 252.7 120.0 60.3


APMQ







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UV and Excimer Focusing Lenses UVAP

CVI has designed this series of lenses for

focusing large diameter excimer laser

beams and for other monochromatic

ultraviolet imaging applications. They are

used in beam delivery systems for excimer

laser photoablation and also in excimer

and Raman-shifted-excimer LIDAR setups.

This series should be considered whenever

diffraction limited performance in the

ultraviolet is needed at a modest f/#.

CVI can help quantify the performance at

wavelengths other than 248nm. All but

the three fastest singlets are diffraction

limited at full clear aperture (CA) at

248nm. The criterion we use is the

wavefront error. At a peak-to-valley

wavefront error of < λ/4, more than 68%

of the focused energy is contained within

the Airy disk. This compares favorably

with diffraction limited systems where

84% of the energy appears inside the first

dark ring of the Airy pattern.

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Outside Diameter (D) 63.5mm

Center Thickness (TC) 8.0mm

Clear Aperture (CA) 50.0mm

Singlet Specifications

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Length (L) 25.4mm


Doublet Specifications

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Length (L) 25.4mm


Triplet Specifications


UV and Excimer Laser Focusing Lenses Focal Length BFD Wavefront Error Part Number Lens Type at 248nm f/D at 248nm at 248nm (λ)

PLCX-63.5-381.2-UV Singlet 750.0 15.0 744.1 0.23

PLCX-63.5-317.7-UV Singlet 625.0 12.5 619.1 0.54

PLCX-63.5-254.1-UV Singlet 500.0 10.0 493.8 1.05

PLCX-63.5-190.6-UV Singlet 375.0 7.5 368.5 2.51

UVAP-500.0-50.0 Doublet 500.0 10.0 496.8 0.05

UVAP-375.0-50.0 Doublet 375.0 7.5 370.0 0.03

UVAP-250.0-50.0 Doublet 250.0 5.0 243.9 0.19

UVAP-125.0-50.0 Triplet 125.0 2.5 108.9 0.24


Surface Quality 10-5 CVI Laser Quality defined on page 430

Focal Length Tolerance ± 0.5%

Clear Aperture 50.0mm


Beam handling, interferometers, material ablation & cutting systems

Air-spaced fused silica design for high energy or UV applications

All CVI AR coating available l 46-49 Use the 33-UVAP lens mount

holder l 396

UVAP

Lens Part Number


193-248 248-355 266 325 1064

248 257 308 355

How To Order 325UVAP-375.0-50.0

Transmitted Wavefront Distortion see table below





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Perfect for micromachining, laser scribing, and microlithography

Air-Spaced Doublet or Triplet design for maximum UV transmission

Infinite conjugate ratio design

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Housing Black anodized barrel or mounted into a microscope

objective style stainless steel housing

UVO UV Objective Lenses

Product Code

Focal Length in mm

Clear Aperture Diameter in mm

Wavelength Range of AR Coating in nm

193-248 248-355 355-532

How To Order 248-3553.014.0UVO

High damage threshold makes this ideal

for micromachining applications. We offer

these lenses in a black anodized aluminum

barrel alone or in the convenience of a

microscope objective style housing. The

housing has standard Royal Microscope

Society screw threads [0.8” x 36TPI].

For higher damage threshold, it is

recommended to use a narrowband

antireflection coating (V-coat). Call CVI

for pricing and delivery.

UVO

UV Objective Lenses Focal Magnification BBAR Part Number Length f/# NA (170mm/fl) BFD WD CA Coating (nm)

UVO-4.0-0.75-193-248 4.0 5.3 0.09 42.50 2.01 1.63 0.75 193-248

UVO-10.3-3.2-193-248 10.3 3.2 0.15 16.50 6.30 5.85 3.20 193-248

UVO-14.0-3.0-193-248 14.0 4.7 0.11 12.10 7.80 6.50 3.00 193-248

UVO-20.0-10.0-193-248 20.0 2.1 0.23 7.96 14.80 13.00 10.00 193-248

UVO-4.0-0.75-248-355 4.0 5.3 0.09 42.50 2.00 1.63 0.75 248-355

UVO-10.3-3.2-248-355 10.3 3.2 0.15 16.50 6.30 5.90 3.20 248-355

UVO-14.0-3.0-248-355 14.0 4.7 0.11 12.10 7.80 6.50 3.00 248-355

UVO-20.0-10.0-248-355 20.0 2.1 0.23 7.96 14.80 13.00 10.00 248-355

UVO-4.0-0.75-355-532 4.0 5.3 0.09 42.50 2.00 1.63 0.75 355-532

UVO-10.3-3.2-355-532 10.3 3.2 0.15 16.50 6.30 5.85 3.20 355-532

UVO-14.0-3.0-355-532 14.0 4.7 0.11 12.10 7.80 6.50 3.00 355-532

UVO-20.0-10.0-355-532 20.0 2.1 0.23 7.96 14.80 13.00 10.00 355-532Unless otherwise noted, all measurements in mm.

Antireflection Coating User specified, Ravg ≤ 0.5% per surface

Transmitted Wavefront Distortion 3/4 λ p-v at 633nm

Damage Threshold 500mJ/cm2, 20ns, 20Hz at 355nm




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FTLF-Theta Lenses

Provides a flat field at the image plane of the scan

Image velocity is proportional to the angular velocity of the scanning mirror

Substrate Material SF11 and BK7 glass


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EFL Effective Focal Length

BFL Back Focal Length

SL Scan Length

BD Beam Diameter

θ Scan Angle (±)

IPS Image Point Size (µm)

D Overall Diameter

F-Theta lenses are commonly used in

conjunction with galvonometer scanning

mirrors in laser marking, engraving, and

cutting systems along with Nd:YAG or

Fiber Laser Sources. F-Theta lenses provide

a flat image field at the plane of interest.

CVI designs have been developed for

common wavelengths and focal lengths.

Standard features include air-spaced design

FTL

for high damage threshold, anti-reflection

coatings on all surfaces, and M85x1 screw

thread for easy fixturing.

In addition to the lenses shown below,

CVI designs custom lenses for other OEM

applications, specifications levels or price

ranges. Please contact a CVI application

engineer for further information.

Antireflection Coating R < 0.5% per surface

Transmitted Wavefront Distortion λ/4 p-v at 633nm per MIL-PRF-13830B

Clear Aperture 90%

Damage Threshold 1J/cm2, 8nsec pulse; 1MW/cm2, CW at 1064nm


F-Theta Lenses Back Scan Entrance Image Effective Focal Length Beam Scan Point Mirror Assembly Focal Length Size Diameter Angle ° (±) Size (µm) Distance Diameter Part Number Wavelength Length (BFL) (SL) (BD) θ (IPS) (a1/a2) (D)

FTL-1064-160 1064nm 160.0 189.1 159.0 10.0 28.5° 23µm 38/25 110.0

FTL-1064-163 1064nm 163.0 190.0 162.0 10.0 28.5° 26µm 38/25 109.0

FTL-1064-254 1064nm 254.0 300.5 260.2 20.0 29.3° 20µm 39.5/19.5 126.0



Multi-Element Lenses - TSUKASA TEC

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