Understanding infrared filters

A “filter” is an optical component that filters out light with no wavelength, or selectively transmits light with a specific wavelength. With filters, we can control the wavelength or band of light that is blocked or passed through.

What is a filter?

Optical filter

Optical filter refers to coating one or more layers of dielectric films or metal films on optical elements or independent substrates to change the characteristics of light wave transmission. Using the characteristic changes of light wave in the transmission of these films, such as transmission, absorption, scattering, reflection, polarization, phase change, etc., to design and manufacture various optical filter products to achieve scientific and engineering applications.

The production and manufacturing of optical filters is a complex engineering technology, involving many professional and technical fields, including vacuum acquisition technology, vacuum measurement technology, computer aided design technology, optical property detection technology, electronic circuit technology, material property detection and preparation technology, etc.

Type of filter

Filter technology and quality control system

In the field of optical components, Meisi Pioneer focuses on the design and development of mid and far infrared band filters, and has built a product system of optical components such as infrared long wave pass filters, band-pass filters, narrowband filters, antireflection/antireflection filters, and metallized light windows.

01. Infrared long wave pass filter

One side of the long wave pass filter is coated with a hard medium long wave pass filter film, and the other side is coated with an antireflection film. The long wave direction is through, and the short wave direction is cut off, which can isolate the short wave in a specific wavelength range.

High transmissivity, low cut-off rate, accurate measurement

Strong stability and anti-interference ability


Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.

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