I am making a camera setup where a webcam is being used with a 35 mm telephoto lens. In the process the stock lens for the webcam was removed. This stock webcam had a lens with a coating that blocked infrared light. Without this the colors are skewed. What I need is a cheap way block this infrared light but without distorting the image. Photo shops sell filters for this purpose.. but they cost as much as the webcam 100$ or more.
2006-08-10 10:05:39 · 5 answers · asked by charlie1138 2 in Science & Mathematics ➔ Astronomy & Space
CCDs are reasonably sensitive as far out as .95 or even 1 micron, whereas our eyes lose their sensitivity by 0.7 microns.
This is a common problem so there are many "off the shelf" solutions.
The Xnite CC1 or CC2 filters from Maxmax would do the trick at $39 for 25mm diameter versions. http://www.maxmax.com/aXRay25mmFilters.asp
(Transmission curves) http://www.maxmax.com/aXNiteTreeFilterComparison.htm
For about the same price, Edmund has a better selection of shapes and sizes. http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productID=1328&search=
Find someone with glass cutting skill to get it to the shape and size you want. You could also buy a busted webcam for cheap on craigslist or ebay and scavenge that filter. Whatever is wrong with the cam, the filter is the last thing that will fail!
If you want to go cheap, you could try blowing some dollars on these: http://scientificsonline.com/product.asp_Q_pn_E_3036119. That light blue one MIGHT do the trick but don't count on it.
2006-08-13 18:36:50 · answer #1 · answered by Mr. Quark 5 · 0⤊ 0⤋
A hundred bucks for a filter sounds like a lot of money. I cannot suggest a filter off the top of my head, but there are several manufacturers of filters that may help. Try Kodak Wratten filters -- camera shops have data. Also, theater filters might do; these are made by Lee, Rosco, and GAM, all of which are sold by PNTA in Seattle (www.pnta.com).
2006-08-10 10:13:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋
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2016-09-29 03:26:48 · answer #3 · answered by dunkelberger 4 · 0⤊ 0⤋
You just need to buy another infrared filter for your camera.
2006-08-10 10:12:26 · answer #4 · answered by Anonymous · 0⤊ 0⤋
What did you with the stock lens? Did you throw it away??
2006-08-10 10:09:42 · answer #5 · answered by Jeff C 2 · 0⤊ 0⤋