The Interference Filter/Cut-off Filter/Optical Instrument/Narrow Bandpass Filters

• After-sales Service: One Year
• Warranty: One Year
• Usage: Lighting, Medical, Optical, Photography
• Type: Filter
• Shape: Customized
• Material: Optical Glass
• Model NO.: RAY-LH022#
• Lenses Color: Customized
• Certification: RoHS, ISO9001, CE
• Customized: Customized
• Substrate: Schott Borofloat 33 or Equivalent
• Surface Quality: 40-20 Scratch-Dig or Custom Manufacturing
• Surface Flatness: Lambda/10 at 632.8nm with Power Removed
• Coating Type: Dielectric Coating
• Wavelength Range: 488-694 Nm/700-950nm
• Transport Package: Cartons or Wood Case
• Specification: 12.7mm/25.4mm/50.8mm or custom manufacturing
• Trademark: Raytek
• Origin: China
• HS Code: 9002909090
• Production Capacity: 100000PCS Per Year

Product Description

Product Description:The interference filter adopts the method of vacuum coating, and coats a layer of optical film with a specific thickness on the surface of the glass. Usually a piece of glass is formed by superimposing multiple layers of films. The interference principle is used to allow light waves in a specific spectral range to pass through. 

Material: Optical Grade Glass
Dimensional tolerance: +0.0/-0.2mm
Finish: 60-40
Clear aperture: >90%
Flatness: /4 @632.8nm
Parallelism: <1 arc min

Product category:There are many kinds of interference filters with different uses. Common interference filters are divided into two types: cut-off filters and band-pass filters.

1.A cutoff filter divides the spectral range into two regions, one in which light cannot pass through (the cutoff region), and the other in which light passes sufficiently (the passband region). Typical cut-off filters include low-pass filters (allowing only short-wave light to pass) and high-pass filters (allowing only long-wave light to pass), both of which are multilayer dielectric films with a high refractive index layer and a low refractive index. A periodic structure composed of alternating layers.
 

2.The bandpass filter only allows light in a narrow wavelength range to pass through. The specific structure is: a translucent metal layer is coated on the glass substrate, followed by a magnesium fluoride interlayer, and then a translucent metal layer. The two metal layers constitute the two parallel plates of the Fabry-Perot etalon. When the distance between the two poles is the same order of magnitude as the wavelength, the interference peaks of different wavelengths in the transmitted light are very separated, and other absorption filters can be used to filter out the light that is not allowed to pass through, so as to obtain a narrow bandpass filter, its passband bandwidth is much narrower than that of ordinary absorption filter.

Main Cooperation Materials Manufacturers:
CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC

Main Export Countries & Areas:
Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.

Raytekoptics Extra value added services offered:
1). Optical workcraft & process solution design;
2). Rough processing raw materials;
3). Semi finishing raw materials;
4). Fabricate custom sizes and shapes;
5). Design and supply custom coatings;
6). Modify and resurface customer supplied materials;
7). Drill holes, notch glass and provide beveled substrates;
8). Precision polish optics with non-standard aspect ratios;

Payment Method: by T/T or Western Union.
Delivery time: 7-10 days.
Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offers quality warranty for our optics products with "3R" policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.