Prism Liquid-Crystal Polarizer
Prism Liquid-Crystal Polarizer
(PLCP) consists of two optical glass prisms and liquid-crystal
layer sandviched between them. Both transmitted and reflected
beams can be used. PLCP can be used in different fields of optics.
PLCP is the optical analog of Glan-Thompson polarizing prism.
It is featured by the high optical transmission, large clear
aperture, high laser induced damage (up to 1GW/cm2).
Possible application: in powerful laser systems with large beam
diameter;
in videoprojection
devices; in optical computing; in experimental setup for light
combination scattering spectra measurements; in optical astronomy,
etc.
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FOTO
Specification
| Optical material |
Îptical glass, liquid crystal |
| Wavelength range |
420-1900 nm |
| Transmission without AR-coating |
84-86% for A=40 mm |
| Size A |
From 25 õ 25 äî 40 to 40 mm |
| Beam deviation |
< 5’ |
| Length to aperture ratio L/A |
From 2.5 to 3 |
| Full angle field |
2° - 10° (àsimmetrical), depends on L/A |
| Extinction ratio |
Transmitted beam < 5 x 10-5
Reflected beam 1 x 10-2 - 3 x 10-2 |
| Surface Quality |
S/D 40/20 |
| Surface Flatness |
λ/4 |
Max. power handling (l=1064)
CW
|
No destruction at 150 W/cm2* |
| Pulsed regime (t=20ns) |
Recommended 1 GW/cm2 ** |
| Angle of beams separation |
40°- 44° |
| AR-coating |
Narrow and broadband
coatings are available to increase transmission to 90-97%, see
“Coatings”. |
| Housing |
Available on request |
*There has been no testing for power > 150W/cm2
**Damage threshold of PLCP is the damage of liquid crystal. The destruction
of PLCPs is the destruction of liquid crystal. The laser test of
liquid
crystal gives the 4-6 GW/ñm2 destruction threshold. PLCPs with size
À > 40mm, also other configurations and other specifications, particularly
with full angle field of 20° and more are available on special request. |
