Converting XG-NV2U LCD Projector to SLM

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The discussion centers on converting a Sharp XG-NV2U LCD projector into a spatial light modulator (SLM) for projecting diffraction gratings. The user is facing issues with the projector's panels not responding to input signals, despite successfully blocking light with polarizing lenses when the projector is off. There is a voltage present, but no changes occur when attempting to display various patterns. Participants express confusion about the feasibility of projecting diffraction gratings as images and seek clarification on the intended functionality. Suggestions for troubleshooting and further details about the conversion process are requested.
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I am currently trying to convert an old Sharp XG-NV2U LCD Projector into a spatial light modulator, and have gotten stuck. The panels don't seem to be interfacing with the computer anymore, which is a problem since I want to use them to project diffraction gratings. Using two polarizing lenses, I have blocked out all light when the projector is off, and then when I turn it back on light is transmitted. So a voltage is getting through, but I can't get any changes regardless of what I am trying to send to the panel (black screen, white screen, stripes, checkers...).
Any suggestions would be much appreciated.

Cheers!
 
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Hi and welcome to PF.
Could we have some more details?
Doesn't a normal data projector consist of a light source, followed by a SLM? I don't understand how you want to "project" a diffraction grating. You can project an image but not a grating. The grating can be formed on the panel inside the projector but how can an image of that grating do any 'diffracting' when it's on a screen? I am confused at the moment.
 

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