Gravity Filter/Vacuum Filter/Pressure Filter/Light Filter/Absorption Filters/Dichroic Filters

• After-sales Service: One Year
• Warranty: One Year
• Usage: Lighting, Medical, Optical, Photography
• Shape: Customized
• Material: Optical Glass
• Certification: RoHS, ISO9001, CE
• Model NO.: RAY-LH234#
• 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: 10000 Set Per Year

Product Description

Product Description:Filters are devices that selectively transmit different wavelengths of light, usually in the optical path as flat glass or plastic devices that are dyed or have an interference coating. Filters are commonly used in photography (where some special effect filters are occasionally used as well as absorption filters), many optical instruments, and in color stage lighting. Filters are commonly used filters and are divided into passband filters and cutoff filters according to spectral characteristics; absorption filters and interference filters in spectral analysis.      

Filters selectively transmit light in a specific wavelength range, i.e., different colors of light, while blocking the rest of the light wave. They can typically pass only long wavelengths (long pass), short wavelengths (short pass) or wavelength bands, blocking longer and shorter wavelengths (band pass). The passband can be narrower or wider; the turn between the maximum and minimum wave peaks can be sharp or flat.

Filters are commonly used in photography (where some special effect filters are occasionally used as well as absorption filters), in many optical instruments, and in color stage lighting. In astronomy, optical filters are used to limit the light transmitted in the spectral band of interest, and filters are also necessary in fluorescence applications such as fluorescence microscopy and fluorescence spectroscopy.

Product Classification:
Filters are one type of filter. Filters can also be made from gases or solutions. Filters are commonly used filters, which are divided into passband filters and cutoff filters according to spectral characteristics; absorption filters and interference filters in spectral analysis. It is mainly used as an auxiliary dispersion, such as in grating spectrometer as a spectral level separator, to eliminate the spectral overlap of low level. Monochromator using interference filters can separate the light of very narrow band range.
1. Absorption filters.
Absorption filters are usually made of glass with various inorganic or organic compounds added. These compounds absorb some wavelengths of light and transmit other wavelengths of light. Compounds can also be added to plastics (usually polycarbonate or acrylic) to produce gel filters, which are lighter and cheaper than glass-based filters.

2. Dichroic filters (interference filters).
Dichroic filters (also known as "reflective" or "thin film" or "interference" filters) can be manufactured by coating a glass substrate with a series of optical coatings. Dichroic filters typically reflect the unwanted portion of the light and transmit the remainder.
Dichroic filters use the interference principle. Their layers form a continuous series of reflective cavities resonant with the desired wavelength. When wave peaks and troughs overlap, other wavelengths are destructively eliminated or reflected. Dichroic filters are particularly suitable for precise scientific work because their precise color range can be controlled by the thickness and order of the coating. They are typically much more expensive than absorption filters and are more delicate. They can be used in devices such as the dichroic prisms of cameras to separate light beams into different color components.

3. Band-pass filters.
Band-pass filters transmit only a certain wavelength band and block other wavelength bands. The width of this filter is expressed as the range of wavelengths it allows to pass, and can be any value from much less than Å to several hundred nanometers.

4. Short-pass filters.
A short-pass (SP) filter is an optical interference or tinted glass filter that attenuates longer wavelengths and transmits (passes through) shorter wavelengths in the effective range of the target spectrum (usually the ultraviolet and visible regions). In fluorescence microscopy, short-pass filters are often used in dichroic mirrors and excitation filters.

5. Long-pass filters.
Long-pass (LP) filters are optical interference or tinted glass filters that attenuate shorter wavelengths and transmit (pass) longer wavelengths over the effective range of the target spectrum (ultraviolet, visible, or infrared). In fluorescence microscopy, long-pass filters are often used in dichroic and blocking (emission) filters.
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.