Optical filter, Infrared filter, IR filter

Optical filter, Infrared filter, 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 

6.well-welcome OEM

7.Contact online sevice to get the quotation right now !!!

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 (CCD or CMOS) 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.

Applications

In contrast to the naming convention of optical filters where the name of the filter denotes the wavelengths that 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 allows 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" is commonly used to refer to filters that pass infrared light while completely 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 removal of 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 processed film block various part of visible light but are all fairly 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 better 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.

Shanghai Hengxiang Optical Electronics Co.,Ltd, located on Shanghai, an international city of China, set up in 2001, is a professional manufacturing high-tech corporation, providesresearch and manufacturing ,entity integrating optical,mechanical and electronic design. Now we have finished primary pipelining of encoder manufacture.

    "HengXiang" brand encoder, has ISO9001:2000 Quality Management System Certificate and CE Certification, moreover, we have own invention patents five and utility model patents five, also passed Shanghai New and High-tech AchievementsTransformation Project.

     Our target: Meeting Client's Requirement,Creating Social value,serving clients attentively and Achieving win-win.

     Sincerely welcome all customers to visit our company, to review and custom "HengXiang" brand products .

Shanghai Hengxiang Optical Electronics Co,ltd

Kuma Feng
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