Recent content by robertcisum1

I too have tried using floppy disc material as an IR pass filter. It works for me when two layers are used. I have never seen any characterization graphs for it as in the link I included in my original post for exposed Kodacolor film. Unexposed slide film (Ektachrome) developed with the Kodak...

Everyone knows that a couple of layers of developed exposed color print film makes a good Infrared Pass filter that blocks visible light. The question is, how good does it block visible light and pass Infrared? The following link: > Film makes infrared...

To retain an IR Filter in the head cap of a pointer, I find that an "O-ring" located as shown, works very well rather than gluing. Use an "O-ring" that has an outside diameter slightly larger than the inside diameter of the head cap. Several advantages of this method are: not messy like gluing...

I just purchased a <200mW Green laser pointer which has no infrared filter. I am wondering if an infrared filter removed from a Web Cam would work to block Infrared from my naked laser. I have no way to characterize one other than the fact that most Web Cams use a CMOS detector all of which I...