Re: Searching a fast LCD shutter
- From: "Roger Hamlett" <rogerspamignored@xxxxxxxxxxxxxxxxxxx>
- Date: Wed, 27 Jul 2005 10:42:47 GMT
"Tilmann Reh" <tilmannreh@xxxxxxxxxxxxx> wrote in message
news:dc7i48$2f3$1@xxxxxxxxxxxx
> (Xpost + Fup2 s.e.c)
>
> Hello, I am looking for a fast optical shutter (probably LCD).
> It must switch between (almost) transparent and black at a frequency of
> about 100 Hz, with switching times of about 1 ms. The needed area is
> only about 1x1 cm, but the device may also be somewhat larger.
>
> I am aware of "3D glasses" that contain two LCD shutters, maybe this is
> the right technology. However, I don't know any company that produces
> (and delivers) such shutters as bare LCDs...
>
> Any hints/ideas?
>
> Thanks,
Such shutters are very common, but most do not produce the contrast range
you are hoping for (the commonest designs require one layer to be a
polariser, giving about 50% attenuation when 'open'. There are some newer
designs though. Look at (for an example):
http://www.bnonlinear.com/Shutter/Intro/LFSeries.html
These require higher voltages to drive, and should just about meet your
requirements.
The same company also does polariser based units, that are much faster.
Best Wishes
.
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