Chinese factory OEM optical products, bandpass filters
and telescope filters from Kunming Optolong
Kunming Yulong Optical&Electronics Technology Co., Ltd. is a professional manufactures of optical
coatings and optical filters processing in China. Top one Astronomical Interference Optical Narrow
Bandpass Filters manufacturer in China,Third in the world. We have passed SGS ROHS and ISO9001.
Interference Optical Narrow Bandpass Filters are used to selectively transmit a portion of the well-defined
spectrum while rejecting all unwanted wavelengths. Our Interference filters provide better
transmission, steeper cut on and cut off slopes, greater blocking, and increased durability.
940 Bandpass Filter Overview:
Working principle: mainly by means of infrared 940nm LED, 940nm semiconductor laser, infrared light source and other various infrared light source to stimulate (emission), the light is reflected back through the 940nm filter to eliminate or filter out stray light, ensure that the received signal is accurate, and will not come out distortion or saturation and garbled phenomenon. Achieve a large amount of data collection and transmission.
Filter advantages: 1) Suitable for sunlight and other bright light interference work; 2) Transmittance up to 90%, and the optical signal attenuation rate is small, effectively improve the working distance and light intensity; 3) Can be directly coating or glue in the infrared transmittance glass by the visible light, rapidly increase the cutoff rate, the vertical incidence in strong light without penetration, light transmission rate is less than 0.2%. And to ensure that working in large angle,and short wavelength shift phenomenon reduction. 4) More than 10 years’ experience in the production of optical filter, imported coating machine to produce, IAD ion assisted deposition technology and to ensure that the low temperature drift and film firmness stronger.
940 Bandpass Filter Specifications:
940nm-40nm Bandpass filter(AOI=0 degree)
940nm Bandpass filter
Tave<1% Tmax<1.5% @400nm~890nm
Tave<1% Tmax<3% @990nm~1200nm
Surface quality: 80/50
When the thickness becomes 2.0 HWB850 colored glass
Tave<0.2% Tmax<1% @400nm~890nm
Tave<1% Tmax<2% @990nm~1200nm
Surface quality: 80/50
940nm-40nm Bandpass filter(The incident angle of 0-24 degrees)
Tave<0.1% Tmax<0.5% @200nm~840nm
Tave<0.1% Tmax<0.2% @980nm~1100nm
Surface quality: 60/40
Substrate: HWB850 Bonding Float glass
940 Bandpass Filter Optical Curvers:
940 Bandpass Filter Application:
Kunming Yulong Optical&Electronics Technology Co., Ltd. is a professional manufactures of optical coatings and optical filters processing in China. Top one Astronomical filters manufacturer in China,Third in the world.Our products include Astronomical Filter,Bandpass Filters,Edge filters, Longpass & Shortpass Filters,Beam spliters,Anti-reflective Coating,Optical Mirrors and so on.Our company were established in 1999,have five precious vacuum coating machines,a set of spectrophotometer (UV-VIS-NIR Shimadzu UV3150) which is imported from Japan.
Core competition ability
Technical Assurance:The CEO has 25 yearsexperience of optical filter design and manufacturing,once
worked as principal of first Chinesemilitary optical instrument industry.
Spot Supply: Thousands of products have been manufactured each year,some products have been
standardized,rich merchandise in stock,deeply lower the customer's sample fee and delivery circle.
Quality Assurance: Rich experience in ISO9001 management system.
Smooth communications: Six foreign trading sales engineer,outstanding products knowledge and