Materials: BK7, fused silica or SF5 optical glass.
Consists of a pair of right angle prisms cemented with a
  dielectric coating on the hypotenuse of one prism.
S-polarized light reflected at 90deg.,
  P-polarized light transmitted without minimal deviation.
High extinction ratio ( > 200:1 ) over specified
  range of wavelength.
Two versions available: Narrowband (for laser lines) and
  broadband.

PBS Specifications
 
Wavefront Distortion: < λ/6 @632.8nm
Dimensions Tolerance: +/- 0.2 mm
Beam Deviation: < 3 arc minutes
Extinction Ratio: >200:1

Coatings:

Input and output faces: AR with R<0.25%
Polarization beamsplitting coating on the hypotenuse:
      Principal Transmittance: Tp>95% and Ts<1%
      Principal Reflectance: Rs>99% and Rp<5%

Structure and beam polarization

Size(mm)