Shutters

Displaytech Shutters are used to modulate the trasnmitted light intensity. Our devices are based on Ferroelectric Liquid Crystal (FLC) technology. Displaytech Shutters blend the speed of electronic shutters and the vibration free operation of standard liquid crystal shutters. The FLC shutter offers exposure times of 1/5,000 of a second while standard liquid crystal shutters may offer exposure times of only 1/100 of a second.

Shutters are used in applications where light must be rapidly switched on/off or where the polarization state of light needs to be switched. They are suited for laser chopping, stereo vision, image capture (freeze-frame), and machine vision. Shutters are used: as switchable color filters to generate color images using high resolution black and white image sensors; for movie conversion from film to digital format; scientific instruments such as microscopes and astronomical telescopes.

Displaytech Shutters are based on electrically switchable FLC halfwave plates. By sandwiching an FLC cell between crossed linear polarizers, the device acts as an intensity modulator. Switching speeds are above 7 kHz offering precise, vibration free operation. Shutter control is achieved when 5-volts is applied across its lead holding it in one state. To change states, the polarity is reversed. Our shutters can achieve a modulation depth of 30 db (or 1000:1 contrast ratio).

Standard shutters are offered in three aperture sizes and two housing options:

• 13mm – circular housing
• 25mm – circular or square housing
• 45mm – circular housing

For custom orders, e-mail sales@displaytech.com.