Rocky Mountain Instrument Co.
1.303.664.5000
 

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Polarizers » Cube Beamsplitters, Broadband 

Broadband Cube Beamsplitters are formed from two right angle, 45° prisms permanently cemented together. The hypotenuse is coated with a combination metallic and dielectric, partial reflection coating. An incident, polychromatic beam is divided into reflected and transmitted components with a ratio (R/T) of 45/45 ± 5%.

All entrance and exit surfaces are coated with a high efficiency, broadband, anti-reflection coating.

 
 
 
sketch-polarizing-cube-beamsplitter
 
 
RMI Standard Specifications
Material:
SF2
Angle of Incidence:
Angle of Reflectance: 90°
Surface Figure:
SF2:
λ/4 at 633 nm typical,
all polished surfaces
Transmitted Wavefront: λ/4 at 633 nm typical
Surface Quality:
SF2:
All surfaces
20-10
Dimensional Tolerance: ± 0.010"
Transmitted Wavefront:
λ/4 at 633nm
Bevels: 0.020" at 45º
Clear Aperture: Exceeds central 85% of dimension
Reflectance:
Rs ≥ 99.8%
Transmittance:
Tp ≥ 95%
Extinction Ratio: Tp/Ts ≥ 500:1
Anti-Reflection Coating: R ≤ 5.5% average