Filters for Lens or light
Filters for Lens or light
(OP)
I was wondering if anybody had a good source or supplier for optical filters, like to remove a certain wavelenght of light from a camera? I am looking for some type of film that could be appied and removed to a plastic lends as needed.
David Sabados BSC
David Sabados BSC





RE: Filters for Lens or light
Standard camera filters include UV and certain color enhancements.
Notch filters generally only come on glass. Edmund Scientific should have those.
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?prod...
There are plastic color filters, also available from Edmund.
http://scientificsonline.com/product.asp?pn=3039417
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RE: Filters for Lens or light
RE: Filters for Lens or light
Is there a military reason for posting here as opposed to the optical engineering forum?
Forum386
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RE: Filters for Lens or light
Dave
RE: Filters for Lens or light
Your camera should have either selectable exposure time or some sort of optical light level control. Most of the older TV systems use counter-rotating variable neutral density filters for that specific reason.
You have about something like 5 orders of magnitude of luminance at the camera lens. A single filter is going to be of marginal utility.
Your best bet is to see if there is some sort of integration time or shutter control on the camera. If that's what you're refering to as the "auto shutter", then there's a problem with the attack and decay routine for the light level control. This is a pretty arcane thing which usually needs to be tweaked.
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RE: Filters for Lens or light
Dave
RE: Filters for Lens or light
RE: Filters for Lens or light
RE: Filters for Lens or light
This obviously only becomes a critical factor if the lens filters are expected to be a part that will suffer attrition in use.
Several research groups have been working on this and I think that work is almost certainly in the public domain through some chemistry journals, particularly the materials chemistry ones.