That's exactly what I'm going for, there is so much tech used today that is really bizarre when you stop to look at it, glad you liked it. Thanks!

I thought so too, thanks for watching!

Thanks! Glad you liked it!

Glad you liked it!

I would imagine these are the cheapest filters possible (for mass production) it would be cool to compare how narrow a band a laser filter is compared to these ones. Thanks for watching!

Yet another awesome video man. I had no idea all of this cool stuff was in these old projectors. Does any light pass through if you stack all three as reject filters? Looks like a small bit of yellow maybe based on how they overlap in that spectrum shot. Also, it also looks like you might get a nice deep blue/UV-heavy light if you took the reflected (sun) ray from the blue mirror and passed it through the green one as a band stop filter. (Or a nice green if you passed the reflected ray off of that through blue as a band stop)

Looking through all three there is a very dark red, maybe IR but I'm not sure if that gets blocked (I forgot to check with my IR camera) either way there is not a lot of light getting through. I need to make set of sturdy holders so I can line them up better. I hadn't thought of using them in a different order, I agree you could probably get a much narrower band that way!

Look at the passband for h alpha filters, it's pretty deep red. You might be able to stack them and take some cool photos of the sun (or fry your sensor, lol)

I have been meaning to do some Solar photography, I'll try it with a "disposable" camera.

Glad you liked it, I've had the projector laying around for over a year while I was away, waiting to be taken apart. Now I can make room for the next project.

I'm not really sure yet, maybe to make a selectable colour light source? BTW I made an LED illuminator for the scope which is bright enough to shoot 1200fps slow motion! No more messing with mirrors and staring into the sun with lenses.

Oh, sweet! Did you use the light source from the projector? I thought about the whole 'staring into the sun through lenses' thing a bit after I'd gone outside after that note. I was going to append a cautionary note to my reply, but then reflected that this isn't your first rodeo. :)

I stole the LED from a "5w" flash light. It measured to be about 2w in practice. I made a little 1 transistor variable power supply and a USB cord. Anywhere you can plug in your phone will now power my microscope! (even those little power packs will go for ~15min)

+Charles Parbax Old LCD projectors are a cheap way, otherwise you might be able to find it on eBay under the name 'dichroic glass filter' or similar.

Dichroic Disco!