I recently acquired my first inexpensive RGB projector and am wondering if the manufacture of the laser modules put an IR filter on either the green or blue heads.
I'm not entirely sure how to tell if there is IR present as I do not have a power meter - but as a crude method I used my Sony video camera, both with and without "nightshot" while covering up the IR LED emitter.
In normal viewing everything looks good. Switching to nightshot reveals the entire inside of the case glowing bright.
So my question is really - is it possible to tell just using such a method?
My next question is, can excessive IR give one a really bad headache? (in the psychical sense) or could it be caused by the slow scan rate and flickering? (had one last night).
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Let's say for a minute there are filters - what would happen if a second filter were used? Other than a slight loss of visible light.
Anyone know where I can locate a couple of filters (other than Spectra Physics or Edmund), or perhaps know the part number of the item I'm looking for...
It contains (1) 50mW 473nm module and (1) 50mW 532nm module. Reds are not a concern as they are 650nm diodes (2) 150mW.
Thank you in advance for the replies!
Phil