Liquid Crystal-based Polarization Modulators

Fast Polarization Modulators – Models

Model	Number of polarization output states	Transmittance	Polarization contrast*	Response time** (T100-T10)	Relaxation time**	VD
FPM(L)	2	≥ 43.5 %	≥ 60:1 ≥ 1,800:1	≤ 6 ms	≤ 30 ms	4 V
FPM(L)-NIR(1100)	2	≥ 40.0 %	≥ 200:1 ≥ 300:1	≤ 5 ms	≤ 15 ms	5 V
X-FPM(L)	2	≥ 43.5 %	≥ 20:1 ≥ 1,800:1	≤ 30 µs	≤ 1.8 ms	24 V
X-FPM(4L)	4	≥ 41.0 %	≥ 120:1 ≥ 30:1 ≥ 500:1	≤ 30 µs	≤ 1.8 ms	24 V
X-FPM(L)-LAS	under development
PolarSpeed-M(L)	2	≥ 42.0 %	≥ 20:1 ≥ 120:1	≤ 30 µs	≤ 30 µs	24 V
VPR	continuous	≥ 41.0 %	≥ 75:1 all outputs	≤ 10 ms all output changes ≥ 20°	≤ 10 ms all outputs ≥ 20°	9 V

* The polarization contrast is defined as the ratio of the desired polarization to the orthogonal component. The lower value applies to the polarization at applied voltage. The higher value applies to polarization without applied voltage.
** The switching time is defined as the time required to switch from polarization without applied voltage to polarization with applied voltage.
The relaxation time is defined as the time required to switch from polarization with applied voltage to polarization without applied voltage.

Sizes

Standard size	Outer dimensions	Clear aperture
7x8	7,0 mm x 8,2 mm	5.0 mm x 5.0 mm
13x15	13,0 mmx 15,0 mm	9.8 mm x 9.8 mm
1x1	25.4 mm x 25.4 mm	22.2 mm x 20.2 mm
2x2	50.8 mm x 50.8 mm	47.6 mm x 45.6 mm
D1 (circular)	25.4 mm diameter	22.2 mm diameter
D2 (circular)	50.8 mm diameter	47.0 mm diameter