bach@brahms.udel.edu (Baskaran Subramaniam) (05/23/91)
Dear netters:
For a visual perception experiment, I need an LCD shutter about 6"
square in size. I have the hardware for "closing" and "opening" the shutter.
The time taken by the shutter to change state should be withing a few
^^^
milliseconds. I do not know if such a thing is available, and if so how much
^^^^^^^^^^^^
does it cost. Has any of you used or seen a shutter that meets my requirement?
I would appreciate any pointers from you.
Thanks.
Baskaran Subramaniam.
(bach@brahms.udel.edu)CDO@ibm-b.rutherford.ac.UK (Chris Osland) (05/23/91)
On 22 May 91 17:51:52 GMT you said: >Dear netters: > > For a visual perception experiment, I need an LCD shutter about 6" >square in size. I have the hardware for "closing" and "opening" the shutter. >The time taken by the shutter to change state should be withing a few > >milliseconds. I do not know if such a thing is available, and if so how much > >does it cost. Has any of you used or seen a shutter that meets my requirement? >I would appreciate any pointers from you. > >Thanks. > >Baskaran Subramaniam. >(bach@brahms.udel.edu) > You may find it easier and cheaper to locate a Kerr cell. These are more often found in Chemistry labs than electronic workshops, but, if my memory of school science is correct, you can get both crystalline and liquid versions and the liquid ones can basically be as large as you like. I think they switch by rotating the polarization of light, so you need another (non-switching) polarizer in the beam and use a voltage on the cell that achieves 90 degree rotation. Apologies if my memory is rusty. Chris Osland Head of Computer Graphics Rutherford Appleton Laboratory (UK)