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Mounted Anamorphic Prism Pairs (Page 1 of 2)

Thorlabs’ Anamorphic Prism Pairs are used to transform elliptical laser diode beams into nearly circular beams by magnifying the elliptical beam in one dimension. Mounted in Ø1" housings that feature SM05 (0.535"-40) threads on one end, these prism pairs can be purchased with an antireflection coating for the 350 – 700 nm, 650 – 1050 nm, or 1050 – 1620 nm spectral range. These mounted prisms can be chosen with magnifications from 2.0 to 4.0.

An average throughput of 95% can be achieved if the prisms are oriented such that the incident light enters the prism pair at Brewster’s angle, and each surface has the appropriate AR coating for the wavelength of the incident light. The maximum input beam width is 90% of the prism width, and the maximum beam height is given by the entrance opening height.

Pre-Aligned and Mounted

Photograph of an actual 635 nm beam from a Hitachi laser diode beam before and after an anamorphic prism pair.

OutD

L

DIn

0.535"-40 Threads(SM05 Compatible)

1.225"(31.1 mm)

Ø1.00"(25.4 mm)

OutD

L

DIn

0.535"-40 Threads(SM05 Compatible)

1.225"(31.1 mm)

Ø1.00"(25.4 mm)

Output

Specificationsn Material: N-SF11 or N-KZFS8n Dimensional Tolerances:

±0.15 mmn Angular Tolerances: ±10 arcminn Surface Quality:

40-20 Scratch-Dig

n Surface Flatness: λ/10 @ 633 nmn Coating Options

• -A: 350 – 700 nm (N-KZF58) • -B: 650 – 1050 nm (N-SF11) • -C: 1050 – 1620 nm (N-SF11)

Please refer to our website for complete models and drawings.

-A Coating (350 - 700 nm)

% R

efle

ctan

ce

Wavelength (nm)

5

4

3

2

1

0300 400 450 500 550 600 650 700

AOI = 8o

AOI = 60o

-B Coating (650 - 1050 nm)

% R

efle

ctan

ce

Wavelength (nm)

16

14

12

10

8

6

4

2

0500 600 700 800 900 1000 1100 1200 1300 1400

AOI = 0o

AOI = 60o

-C Coating (1050 - 1620 nm)

% R

efle

ctan

ce

Wavelength (nm)

18

16

14

12

10

8

6

4

2

0800600 1000 1200 1400 1600 1800 2000 2200

AOI = 0o

AOI = 60o

Broadband Antireflection CoatingN-KZFS8

Broadband Antireflection CoatingsN-SF11

www.thorlabs.com 871

CHAPTERS

Optical Elements

Polarization Optics

Optical Isolators

Optical Systems

Optics Kits

SECTIONS

Spherical Lenses

Achromatic Lenses

Aspheric Lenses

Cylindrical Lenses

Mirrors

Spectral Filters

ND Filters

Beamsplitters

Prisms

Gratings

Windows

Beam Displacers

Diffusers

Optics

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30°

0.500"(12.7 mm)

0.315"(8.00 mm)

0.433"(11.0 mm)

0.433"(11.0 mm)

Thorlabs’ unmounted prism pairs are available uncoated or with an antireflection coating for the 350 – 700 nm, 650 – 1050 nm, or 1050 – 1620 nm range. The anamorphic expansion (one-dimensional expansion) can be adjusted by changing the angles and the offset between the prisms. The plots on the right show the angles at which the prisms must be set for various magnifications.

Unmounted Anamorphic Prism Pairs

* Price is per pair

PS871-B PRISM PAIR

aPrice Includes AR Coating bMeasured at 670 nm cRefer to Drawing on Opposite Page

Mounted Anamorphic Prism Pairs, AR Coated: 1050 - 1620 nm ANAMORPHIC INPUT ITEM #a $ £ E RMB MAGNIFICATIONb OFFSET Lc MATERIAL

PS875-C $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 2.0 3.37 mm N-SF11

PS879-C $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 3.0 5.43 mm N-SF11

PS883-C $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 4.0 6.06 mm N-SF11

aPrice Includes AR Coating bMeasured at 670 nm cRefer to Drawing on Opposite Page

Mounted Anamorphic Prism Pairs, AR Coated: 650 - 1050 nm ANAMORPHIC INPUT ITEM #a $ £ E RMB MAGNIFICATIONb OFFSET Lc MATERIAL

PS875-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 2.0 3.7 mm N-SF11

PS877-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 2.5 5.15 mm N-SF11

PS879-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 3.0 5.43 mm N-SF11

PS880-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 3.2 5.63 mm N-SF11

PS881-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 3.5 6.0 mm N-SF11

PS883-B $ 335.27 £ 241.39 e 291,68 ¥ 2,672.06 4.0 6.06 mm N-SF11

ITEM #* $ £ E RMB AR COATING MATERIAL PS870 $ 118.97 £ 85.65 e 103,50 ¥ 948.15 Uncoated N-SF11

PS873-A $ 150.36 £ 108.26 e 130,81 ¥ 1,198.37 350 – 700 nm N-KZFS8

PS871-B $ 150.36 £ 108.26 e 130,81 ¥ 1,198.37 650 – 1050 nm N-SF11

PS872-C $ 150.36 £ 108.26 e 130,81 ¥ 1,198.37 1050 – 1620 nm N-SF11

Mounted Anamorphic Prism Pairs (Page 2 of 2)Mounted Anamorphic Prism Pairs, AR Coated: 350 - 700 nm ANAMORPHIC INPUT ITEM #a $ £ E RMB MAGNIFICATIONb OFFSET Lc MATERIAL

PS875-A $ 335.27 £ 241.39 e 291,68 ¥ 2,672.10 2.0 4.7 mm N-KZFS8

PS879-A $ 335.27 £ 241.39 e 291,68 ¥ 2,672.10 3.0 5.85 mm N-KZFS8

PS883-A $ 335.27 £ 241.39 e 291,68 ¥ 2,672.10 4.0 5.81 mm N-KZFS8aPrice Includes AR Coating bMeasured at 405 nm cRefer to Drawing on Opposite Page

30°

0.500"(12.7 mm)

0.315"(8.00 mm)

0.433"(11.0 mm)

0.433"(11.0 mm)

Unmounted Anamorphic Prism PairsAnamorphic Prism Pair Angles:-A Coating (405 nm), N-K2FS8

Magnification

Angl

e (D

egre

es)

45

40

35

30

25

20

15

10

5

0

-52 3 4 5 6

Anamorphic Prism Pair Angles:-B and -C Coatings (670 nm), N-SF11

Magnification

Angl

e (D

egre

es)

45

40

35

30

25

20

15

10

5

0

-52 3 4 5 6Positive Angles are

Measured Clockwise

Magnification =

DOUT

DIN

DOUT

DIN

α1

α2