Fast Optical Shutters

The FOS (Fast Optical Shutter) series is a collection of optical shutters using liquid crystal based optical polarizers. The transmission of light is regulated by an external voltage. Compared to conventional mechanical shutters, the LC shutters operate vibration-free, without moving components and are working with very short switching times.

Optical Shutters – Models

ModelOpen state
transmittance
ContrastClosing time
(T100-T10)
Opening time
(T0-T90)
VD
FOS≥ 39.5 %≥ 1,000:1
≥ 1,800:1
≤ 6 ms
≤ 150 µs
≤ 30 ms
≤ 35 ms
4 V RMS
24 V RMS
FOS-ETR≥ 32.5 %≥ 850:1
≥ 1,200:1
≤ 6 ms
≤ 500 µs
≤ 35 ms
≤ 40 ms
5 V RMS
18 V RMS
FOS-NIR(1100)≥ 37.0 %≥ 250:1
≥ 350:1
≤ 5 ms
≤ 120 µs
≤ 15 ms
≤ 20 ms
5 V RMS
24 V RMS
X-FOS(G2)≥ 37.5 %≥ 1,800:1≤ 50 µs≤ 1.8 ms18 V RMS
X-FOS(G2)-CE≥ 30 %≥ 120,000:1≤ 50 µs≤ 1.8 ms18 V RMS
X-FOS(G2)-LASunder development
PolarSpeed-S≥ 37.5 %≥ 300:1≤ 30 µs≤ 30 µs24 V RMS
PolarView-ND(212)≥ 25 %≥ 1,000:1≤ 10 ms≤ 15 ms4.5 V RMS
PolarView-ND(14)-F≥ 50 %≥ 10:1≤ 200 ms≤ 700 ms7 V RMS
FSD≥ 83 %light scattering≤ 7 ms≤ 9 ms110 V RMS

Sizes

Standard sizeOuter dimensionsClear aperture
7x87,0 mm x 8,2 mm5.0 mm x 5.0 mm
13x1513,0 mmx 15,0 mm9.8 mm x 9.8 mm
1x125.4 mm x 25.4 mm22.2 mm x 20.2 mm
2x250.8 mm x 50.8 mm47.6 mm x 45.6 mm
D1 (circular)25.4 mm diameter22.2 mm diameter
D2 (circular)50.8 mm diameter47.0 mm diameter