Optical Polarization Beamsplitters

*Waveplate is a plane-parallel uniaxial crystal plate with the optical axis parallel to its surface. The light incident normal to the surface is composed of two polarized components: Ordinary wave and extraordinary wave. When the light propagates through retardation plate, the polarization is changed.Phase different introduced by waveplates is 2π(no-ne)H/λ, which is called retardance. H is the thickness of waveplate.

*Polarization beamsplitter cubes are constructed by cemented two right angle prisms, the hypotenuse of one prism is coated with polarization dielectric coating.
When used with normal incident, un-polarized light, the incident beam is separated into two polarized beams, p-polarized component is passed straight through, s-polarized component is reflected out at 90deg.

*Specifications:
Material BK7 grade A optical glass
Dimension Tolerance: +0.2, -0.2mm
Thickness Tolerance: ±0.2mm
Surface quality: 60/40
Clear Aperture: >85%
Flatness: λ/4 per 25mm@633nm
Parallelism: ±3'
Bevel: <0.25mm×45°
Coating: Hypotenuse surface :Polarization dielectric coating ,
Entrance/Exit surfaces :AR coating
1.Laser line (Extinction Ratio 500:1) ,AOI= 0°:
Tp>96% and Ts<0.2%
Rp<4% and Rs>99.7%
2.Broadband wavelength (Extinction Ratio: 200:1) ,AOI= 0°:
Tp>95% and Ts<0.5%
Rp<5% and Rs>99.5%

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