Fluorescent Minerals and stuff - Blu-Ray & IR

[Switch]

I was thinking that it might not be really healthy to breath, and it would get lost in the air quickly so I thought of a sealed glass box with a fan inside to keep the particles on the air ;D

The matrix diffraction grating pretty much just splits your beam into a lot of beams and it shows as a dot matrix on a wall.Shining a powerfull green laser through it in a dark room gives the impression that the room is spinning and moving and makes you feel dizzy and nauseous.You could probably make someone more sensitive to motion sickness throw up by having them watch that for several minutes.
I don't know how useful it would be , but it would definetly be a cool efect to use on your bluray if you have fluorescent walls surrounding you ;D

 

[daguin]

Gotta find this megamatrix grating - sounds like something that might be useful for my LD??? I did some quick research into diffraction gratings, but didn't see anything particularly useful yet...

See the below link.

http://www.novalasers.com/NOVAstore/pc/viewCategories.asp?idCategory=6

I wonder if anyone on the list deals with diffraction grating?

Peace,
dave

 

[Pirateo40]

I saw those Nova gratings, but wasn't sure how to use them. THere doesn't appear to be a lot of detail on the web site - i.e., how big are they? How far from the diode must they be mounted, etc. Right now I defocus my dot to about the size of a nickel for a broader beam sweep - cover as much ground as possible. But of course that reduces intensity. I considered a "line" optic to expand the beam in one plane - wonder if that would work...

 

[daguin]

I saw those Nova gratings, but wasn't sure how to use them. THere doesn't appear to be a lot of detail on the web site - i.e., how big are they? How far from the diode must they be mounted, etc. Right now I defocus my dot to about the size of a nickel for a broader beam sweep - cover as much ground as possible. But of course that reduces intensity. I considered a "line" optic to expand the beam in one plane - wonder if that would work...

Click on the "details" buttons. It won't answer all of your questions, but it will give you a better idea of the construction. The ones at Nova are designed to slip over the end of the pointer.

I don't think that distance from the aperture is much of an issue with lasers. I know that I can just put one of the picture-type grates from one of my cat toys on the end of any of my pointers and they work.

Peace,
dave

 

[Pirateo40]

AHA - I found the other gratings.... Didn't notice the scroll buttons in the category box. This one (DG Double) looks quite interesting - I think I'll order one. They say they're made out of glass - a plus for 405nm I think.

Not sure which is bigger - the X-Series or Alpha Series. Since my host is unique I will probably have to figure out a mounting for it - seems like the bigger one would work best. Any idea which is bigger?

 

[daguin]

Not sure which is bigger - the X-Series or Alpha Series. Since my host is unique I will probably have to figure out a mounting for it - seems like the bigger one would work best. Any idea which is bigger?

The Alpha series is the larger housing. I don't know if the grating surface is larger. I believe the beam size is the same. There would be little reason to make the grating portion larger.

Peace,
dave

 

[Curiously_Coherent]

Great thread guys! I have a line grating from a recent eBay buy from Meredith and it will mount perfectly on my Blu-Ray, so that's the way I'll go. Sort of like a scanner from Terminator.

Thanks for the info on the SW lights. I will explore the options and make one myself. I have a few extra battery packs from old mountain bike lights that will work well for power supplies.

Cheers! CC

 

[Things]

Yeah i was gonna say get a line diffraction grating, then all you have to do is "scan" the ground and watch for a glow ;D ;D ;D

 

[Pirateo40]

Which would offer the least light reduction - a line grating or a line optic? Anyone know?

 

[Hemlock_Mike]

Pirateo --

Look what you gone and done Added a new hobby here.

Great work man -- congrats ;D

Mike

 

[Switch]

I can't believe I didn't even think about this scanner thing.It would be awesome (with a powerfull blu-ray of course.

Which would offer the least light reduction - a line grating or a line optic?  Anyone know?

I tend to believe that a line optic (like a wine glass leg type of thing) would work best since diffraction gratings usually make a picture(or line) out of several tiny dots and create some artifacts in the picture projected resulting in more power lost.

 

[mrtroy1]

Re: Fluorescent Minerals and stuff - Blu-Ray & IR

hi am understanding right in that hoya glass will filter down to the short wave spectrum? then is there a laser with the right light so i could real get my rocks to flourese?

 

[AUS]

Re: Fluorescent Minerals and stuff - Blu-Ray & IR

You need a light that generates UV before you filter the visible light off- mainly mercury and Xenon arc lamps.

A 405nm "Blu Ray" laser will flouress things that glow in long wave UV.

Woods glass if you can get it passes UV and IR. They used to make signal lights using in in WW2 using IR at night and UV during the day.

Most "UV Filters" for cameras are UV cut. I caouldn't find any on eBay but somne camera shops have them- a search an google showed a few UV pass filters. I have some Hoya IR filters I used for IR photography after i removed the IR filter from a camera.