100000 Piece/Pieces per Day optical 850mm ir filter
Packaging & Delivery
Blister plate (100PCS/layer) for optical 850mm ir filter
within 10-20 days
Optical color filter for optical 850nm ir filter
1.Material : Colored optical materials 2.Specification : according to customer drawings 3.Precision (the highest) : N=2;N=0.5;B=40/20;C=0.01
4.size :according to customers' requirement
5.any other requirement can be customized
7.Contact online sevice to get the quotation right now !!!
BK7, BK9, silicon, Germanium, Sapphire, ect.
according to your requires
according to your requires
30% (per one surface)
Surface Quality (Scratch-Dig)
60-40 (according to your requires)
Spherical Surface Powerb
λ/2 (according to your requires)
>= 90%central of the diameter
Uncoated (according to your requires)
Infrared cut-off filters, sometimes called IR filters or heat-absorbing filters, are designed to reflect or block mid-infrared wavelengths while passing visible light. They are often used in devices with bright incandescent light bulbs (such as slide and overhead projectors) to prevent unwanted heating. There are also filters which are used in solid state video cameras to block IR due to the high sensitivity of many camera sensors to near-infrared light. These filters typically have a blue hue to them as they also sometimes block some of the light from the longer red wavelengths
In contrast to the naming convention of optical filters where the name of the convertible the conduct of the color of light which they are blocked, and in line with the convention for air filters and oil filters, photographic filters are named for the color of light they pass. Thus a blue Filter makes the picture look blue. A black filter marginally allow more light in the blue wavelength to pass resulting in a slight shift of the color temperature of the photo to a cooler color. Because of this, the term "IR filters" To refer to filters that pass infrared light while addition blocking other wavelengths. However, in some applications the term "IR filter" still can be used as a synonym of infrared cut-off filter.
IR-transmitting (passing) filters, or commonly removed factory, IR-blocking filters, are commonly used in infrared photography to pass infrared light and block visible and ultraviolet light. Such filters appear black to the eye, but are transparent when viewed with an IR Sensitive device.
Since the dyes in processing film block various parts of visible light but are all expected transparent to infrared, dark black sections of any processed film (where all visible colors are blocked) pass only infrared light and are commonly used (layering one over another if necessary For more visual light filtering as a cheap alternative to expensive glass-backed filters. Such filters can be used both over color camera lenses, and to filter visible light from IR illumination sources. Such filter stock is most easily made available most simply by having Any commercial color negative film developed after being fully exposed to light.
Packaging & Shipping
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