Polarizing Cube Beamsplitter(PBS)

Polarizing Cube Beamsplitters split randomly polarized beams into two orthogonal, linearly, polarized components-S-polarized light is reflected at a 90deg. Angle while P-polarized light is transmitted. Each beamsplitter consists of a pair of precision high tolerance right angle prisms cemented together with a dielectric coating on the hypotenuse of one of prisms.

  Narrow Band Polarization Beamsplitter Cube

Material

BK7 or SF glass

Dimension Tolerance

±0.2mm

Extinction Ratio

>100:1 for broadband
>500:1 for narrow band

Surface Quality

60/40 scratch and dig

Beam Deviation

<3 arc minutes

Flatness

λ/4 @ 632.8 nm per 25mm

Principal Transmittance

Tp>95% and Ts<1%

Principal Reflectance

Rs>99% and Rp<5%

Coating

Polarization beamsplitter coating on hypotenuse face
AR-coating on all input and output faces


Broadband Polarization Beamsplitter Cube

Material

BK7 or SF glass

Dimension Tolerance

±0.2mm

Extinction Ratio

>100:1 for broadband
>500:1 for narrow band

Surface Quality

60/40 scratch and dig

Beam Deviation

<3 arc minutes

Flatness

λ/4 @ 632.8 nm per 25mm

Principal Transmittance

Tp>95% and Ts<1%

Principal Reflectance

Rs>99% and Rp<5%

Coating

Polarization beamsplitter coating on hypotenuse face
AR-coating on all input and output faces


Note: Other T/R such as 30/70 or 20/80 can be offered upon request.