It is REALLY hot in there. You don't want your lenses in there, and you really don't want to mess with that airflow to the bulb.
I am pretty suprised the glasses make acceptable filters. The glasses are designed to filter the 12fl coming off the screen, not the 800 lumen coming from the projector.
yeah it's pretty hot there. I was a little bit worried that the lens would crack but being inorganic, it would withstand, no?
there is around 3.5mm gap between the front of the lamp and fresnel lens(?) and thickness of the filter is 2.5mm. I am not sure this 3.5mm is critical for air flow. lamp appears to have its own cooling/air circulation internally (guessing based on the gridded window on top, or is it a passage to exterior for fumes in case of a blow up on the lamp?). as for the slit, it's very large (2cm?) so adding 2.5mm wouldnt affect the air flow imo.
but as said, it's a little bit risky to try I guess but my motto in research is "high risk - high impact research", that's why I cant publish many papers
But I agree, air flow may be an issue. Any temp sensor efendy?
I didnt see one but I need to look more closely.
Also, if the dolby filter could be put after the IR filter....
EDIT: It looks like your IR filter is inside the lamp (front lens looks angled....). Am I wrong?
That glass on the front of the lamp is in concave shape but I dont know anything about ir filters except the fact that they make projector-based multi-touch tables possible.
Can it be placed after fresnel lens? would this approach make it more dangerous for the lamp as the reflected light would be focused/concentrated back by the fresnel lens?
I cant open up my projector as it still has got another 3 years of warranty. but as jack said, lenses work pretty good externally. so I would stick to that at the moment