635nm Band Pass Filter
Laser ranging filters are commonly used in engineering measurements, room construction ranging, civilian scene ranging, etc.
Among the widely used optical filter solutions, the 635nm bandpass filter is a widely utilized one. After the LED laser emits a beam, it passes through the 635nm bandpass filter for processing and filtering. Then, another optical sensing component senses the reflected light and quickly calculates the actual distance.
Basic parameters of 635nm bandpass filter:
Center wavelength: 635nm
Half-peak bandwidth: 40nm
Peak transmittance: >90%
Cutoff wavelength: 200nm-1100nm
Cutoff depth: >OD4-OD6
Product material: optical glass (K9, BK7, B270, D263T, quartz glass, colored glass, float glass, etc.)
Surface finish: National Standard Grade 3, US Military Standard 40-20 (scratch/pitting)
Environmental testing: MIL-STD-810F or fogging test
A bandpass filter is a filter with adjacent cut-off bands on both sides of the transmission band in the spectral characteristic curve. Based on their spectral characteristics, bandpass filters are broadly classified into two types: broadband filters and narrowband filters. These two types of filters are usually combined. The principle of light wave interference is applied to prepare bandpass filters, which have found widespread applications in various fields.
The main characteristic parameters of a bandpass filter are:
① : Central wavelength, also known as peak wavelength;
②: Peak transmittance;
③: Half-width, which is the wavelength width of the passband at half the peak value of the transmission peak;
④: Cutoff depth, minimum transmittance of the suppression zone, i.e., background transmittance;
⑤: Long-wave cutoff range;
⑥: Short-wave cutoff range.
In practical optical engineering applications, not all situations where bandpass filters are required desire the narrowest passband possible. For instance, the 635nm bandpass filter used in laser rangefinders
ABOUT BORISUN
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.
Welcome to OEM and Purchasing!
Recent Posts
Send Requests