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Rochon Polarizers

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Rochon Polarizers

Rochon polarizer is one of  the earliest designs, which is made of two birefringent material prisms  cemented together. Both ordinary and extraordinary beams propagate  collinearly down the optic axis in the first prism under the ordinary  refractive index. Upon entering the second prism the ordinary beam  experiences the same refractive index and continues undeviated. The  extra-ordinary beam, however, now has a lower refractive index and is  refracted at the interface. The angle of refraction is further increased  at the birefringent material/air exit surface. Any separation angle can  be designed for specific wavelength upon the requirement. The  separation angle of standard products vs wavelength is shown in the plot  below.

Separation Angular of Standard Products vs Wavelength


            a -BBO, 190-3500nm


            Quartz, 200-3300nm


            YVO4, 400-4000nm


            MgF2, 160-1500nm

 

Specifications

Material

a-BBO, Calcite, YVO4,   Quartz

Wavelength Range

a-BBO:190-3500   nm,YVO4:400-4000nm,Quartz:200-2300nm

Extinction Ratio

Quartz:<5x10 -5 ; a-BBO,   YVO4:<5x10 -6

Parallelism

<1 arc Min


           

Surface Quality

20-10

Beam Deviation

< 3 arc minutes

Wavefornt Distortion

λ/4@633nm

Damage Threshold

>500 MW/cm 2

Coating

Single MgF2

Mount

Black Anodized Aluminum


Standard Products

Part No.

Extinction Ratio

Separation Angle(°)

C.A. f a (mm)

O.D. f d (mm)

L ±0.1(mm)

RHP6006

<5x10 -6

8.0°-14°
            8°@775nm

6.0

15.0

14.0

RHP6008

8.0

25.4

16.0

RHP6010

10.0

25.4

18.0

RHP6015

15.0

30.0

23.0

RHP6020

20.0

38.0

28.0

RHP9006

<4x10 -6

1.0°-1.5°
            1°@980nm

6.0

15.0

36.0

RHP9008

8.0

25.4

46.0

RHP9010

10.0

25.4

28.0

RHP9015

15.0

30.0

38.0

RHP9020

20.0

38.0

48.0

RHP8006

<5x10 -6

9.8°-13.0°
            10°@1064nm

6.0

15.0

14.0

RHP8008

8.0

25.4

16.0

RHP8010

10.0

25.4

16.0

RHP8015

15.0

30.0

20.0

RHP8020

20.0

38.0

25.0

RHP5006

<5x10 -4

1.0°-2°
            1°@980nm

6.0

15.0

14.0

RHP5008

8.0

25.4

18.0

RHP5010

10.0

25.4

18.0

RHP5015

15.0

30.0

38.0

RHP5020

20.0

38.0

48.0


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