The document describes Rochon polarizers, which consist of two birefringent material prisms and offer features like undeviated ordinary rays and customizable separation angles. Different materials such as A-BBO, calcite, YVO4, quartz, and MgF2 are available, with specified wavelength ranges and extinction ratios. Detailed specifications for each material type, including dimensions and performance metrics, are also provided.

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ROCHON POLARIZERS
Rochon polarizer is made of two birefringent material prisms cemented or
optical contacted together. The Rochon prism was invented by and is named
after Abbé Alexis Marie Rochon. It is in many ways similar to the Wollaston
prism, but the ordinary ray passes through the prism undeviated. Any
separation angle can be designed according to request of customers.
Features
 Multiple Polarization Materials Available
 Ordinary Rays Pass Through Undeviated
 Extraordinary Rays Deviate
Photonchina Specifications：
Material: a-BBO, Calcite, YVO4,Quartz,MgF2
Wavelength Range:
a-BBO：190-3500nm,YVO4：500-4000nm
Quartz：200-2300nm，Calcite:350-2300nm
Extinction Ratio: Quartz：
<5*10-5，
α-BBO ,YVO4：
<5*10-6
,MgF2：
<10-4
Surface Quality: 20 / 10
Beam Deviation: < 3 arc minutes
Wavefront
Distortion:
λ /4@633nm
Damage
Threshold:
>500 MW/cm2
Coating: Single MgF2
Mount: Black Anodized Aluminium

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1. a-BBO Rochon Polarizer
Wavelength
Range(nm)
Extinction
Ratio
Separate
Field(°
)
C.A. fa(mm) O.D. fd(mm) L ±0.1(mm)
190-2300 <5x10-6 8°
@1064nm
6.0 15.0 15.0
8.0 25.4 17.0
10.0 25.4 19.0
15.0 30.0 23.0
20.0 38.0 29.0
2. YVO4 Rochon Polarizer
Wavelength
Range(nm)
Extinction
Ratio
Separate
Field(°
)
C.A. fa(mm) O.D. fd(mm) L ±0.1(mm)
500-4000nm <5x10-6 10°
@1550nm
6.0 15.0 15.0
8.0 25.4 17.0
10.0 25.4 19.0
15.0 30.0 23.0
20.0 38.0 25.0
3. Quartz Rochon Polarizer
Wavelength
Range(nm)
Extinction
Ratio
Separate
Field(°
)
C.A. fa(mm) O.D. fd(mm) L ±0.1(mm)
200-2300nm <5x10-5 1°
@1064nm
6.0 15.0 20.0
8.0 25.4 24.0
10.0 25.4 28.0
15.0 30.0 38.0
20.0 38.0 48.0

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4. MgF2 Rochon Polarizer
Wavelength
Range(nm)
Extinction
Ratio
Separate
Field(°
)
C.A. fa(mm) O.D. fd(mm) L ±0.1(mm)
110-8000nm <5x10-4 1°
@980nm
6.0 15.0 14.0
8.0 25.4 18.0
10.0 25.4 18.0
15.0 30.0 38.0
20.0 38.0 48.0