LCD Projectors - Dichroic Glass

[@nym49]

You deserve way more subscriptions...with each video I'm learning something new. It might not always be groundbreaking, but there's a "whoa...I did not know" moment in everyone of them.

[@NickMoore]

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!

[@qbitsday3438]

What is a small glass plate in front of lCD and how do I replace .

[@teemitch4075]

My projectors dich glass has a dark burn mark on the glass and the dark spot shows on screen when i turn the projectot on ?can you buy a replacement dich glass trying to fix my projector. nick help me out

[@BoffinGrusky]

Nicely done!

[@NickMoore]

Thanks! Glad you liked it!

[@whuzzzup]

Interesting. Thank you for the video.

[@NickMoore]

I thought so too, thanks for watching!

[@JimGriffOne]

Wow. I've always wondered why they had so many optics in projectors. I suppose they're using the same sputter coating technique used for laser filters, but laser filters have several layers of different substances at different thicknesses to produce a narrow rejection filter response. Must've been difficult for the first engineers who came up with the transfer function formulas. But now they can be so precise with making light filter optics!

[@NickMoore]

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!

[@jcims]

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)

[@NickMoore]

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!

[@jcims]

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)

[@NickMoore]

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

[@MonuKumar-rt2mu]

Great explanation thanks

[@NickMoore]

Glad you liked it!

[@NevinWilliams71]

That's a really nifty find! Do you have any practical plans for them in mind?

[@NickMoore]

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.

[@NevinWilliams71]

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. :)

[@NickMoore]

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)

[@charlesparbax1594]

Does anyone know where to buy piece of dichroic glass ?

[@NickMoore]

+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.

[@MyShopNotes]

I do find your videos interesting.

[@NickMoore]

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.

[@MOMOSHOWPALACE]

Wow, Thank you.

[@stevodib47]

SO COOOOL LASER DUDE,,,,,PUT A LASER ON THEM ./////TAKE OLD PROJECTORS APART..... COOL....

[@TheGamblermusic]

party time 1:31 !!!

[@NickMoore]

Dichroic Disco!

[@MuhammadYaseen-vx5hw]

what are correct color wise positions for Dichroic Lenses (fat lens)?