Rochon Polarizer

Optics >>> Polarizer >>> Rochon Polarizer

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 versus Wavelength
 

a-BBO, 190-3500nm

Quartz, 200-3300nm
 


YVO4, 400-4000nm

 
Main 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
Wavefront Distortion l/4@633nm
Damage Threshold >500 MW/cm2
Coating Single MgF2
Mount Black Anodized Aluminum

Standard Products

1. a-BBO Rochon Polarizer
Part No.
Extinction Ratio
Separation Angle()
C.A. 
fa (mm)
O.D. 
fd (mm)
L0.1(mm)
RCP-6006
<5x10-6
8.0-14
8@800nm
6.0
15.0
14.0
RCP-6008
8.0
25.4
16.0
RCP-6010
10.0
25.4
18.0
RCP-6015
15.0
30.0
23.0
RCP-6020
20.0
38.0
28.0

 

2. Quartz Rochon Polarizer
Part No.
Extinction Ratio
Separation Angle()
C.A. 
fa (mm)
O.D. 
fd (mm)
L0.1(mm)
RCP-9006
<4x10-6
1.0-1.5
1@980nm
6.0
15.0
36.0
RCP-9008
8.0
25.4
46.0
RCP-9010
10.0
25.4
28.0
RCP-9015
15.0
30.0
38.0
RCP-9020
20.0
38.0
48.0

 

3. YVO4 Rochon Polarizer
Part No.
Extinction Ratio
Separation Angle()
C.A. 
fa (mm)
O.D. 
fd (mm)
L0.1(mm)
RCP-8006
<5x10-6
9.8-13.0
10@1064nm
6.0
15.0
14.0
RCP-8008
8.0
25.4
16.0
RCP-8010
10.0
25.4
16.0
RCP-8015
15.0
30.0
20.0
RCP-8020
20.0
38.0
25.0

    

  

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