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Photonics Buyers' Guide / Neutral Density Filters
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There are 62 companies listed in

Market Data

Neutral Density Filters

A neutral density filter is a light filter that decreases the intensity of the light without altering the relative spectral distribution of the energy. Also known as a gray filter.

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Reynard Corporation - San Clemente, CA
Reynard Corporation manufactures custom optical components and thin-film coatings from 0.2 to 50 microns (UV to far-IR), in-house single-point diamond turning, optical fabrication, photolithography pattern optics, environmental testing, and design services. Prototype to production, ISO 9001:2015 certified, ITAR registered, and cybersecurity compliant.
• Established in 1984
• 45 employees
• Privately Owned
• Custom Manufacturer
Step Linear Neutral Density Filters
Thin-Film Coatings: Step Circular ND Filters
Custom Circular Variable ND Filters
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Abrisa Technologies - Santa Paula, CA
Designs and manufactures precision optical coating solutions and custom flat glass fabricated optical products. Fabrication: cutting, edging, screen printing, strengthening, machining and cleaning. Coatings: AR, ITO, IMITO, heat control, UV, IR, beamsplitter, mirror and metal, ND filter, wavelength selection filter, dichroic, oleo, and hydrophobic.
• Established in 2011
• 150 employees
• 121,000-sq ft facility
• Privately Owned
• Custom Manufacturer
Dichroic Filters
UV Filters
Low Reflection & Non-Glare Glass
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Chroma Technology Corp. - Bellows Falls, VT
Manufacturer of optical filters and coatings for many demanding applications such as: biomedical instruments and imaging systems, fluorescence microscopy, aerospace, surveillance, machine vision, industrial inspection such as semiconductors, food and lumber, multispectral imaging, and chemical analysis.
• Established in 1991
• 125 employees
• 41,000-sq ft facility
• Employee Owned
• Stock Manufacturer
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Hoya Corporation USA, Optics Div. - Milpitas, CA
Supplier of colored filter glasses and optical materials in raw, semifinished and finished forms. Our colored filter glass substrates cover a wide range of spectral characteristics from the UV to IR region.
• Established in 1968
• 25 employees
• 10,000-sq ft facility
• Privately Owned
• Stock Manufacturer
• Custom Manufacturer
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UQG (Optics) Ltd. - Cambridge, England
Manufacturer and supplier of custom optics and catalog stock optical windows, flats, substrates, optical filters, optical lenses, and optical components for OEMs, research, and scientific industries. Materials include fused silica, quartz, color/filter glasses, sapphire, and optical glasses. Micro dicing and assembly services.
• Established in 1955
• 19 employees
• 10,000-sq ft facility
• Privately Owned
• Stock Manufacturer
• Custom Manufacturer
Color Glass Filters
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A.R.W. Optical Corporation - Wilmington, NC
Manufacturer of custom, standard, and OEM optical components and coatings in the UV to IR region. Provides rapid prototyping through volume production. Products include assemblies, beamsplitters, filters, lenses, mirrors, prisms, windows, and wedges.
• Established in 1980
• 10 employees
• 10,000-sq ft facility
• Privately Owned
• Custom Manufacturer
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Berliner Glas Group - Berlin, Germany
OEM partner for optical key components, assemblies, and systems as well as high-quality refined technical glass. From concept to volume production, Berliner Glas Group companies serve innovative customers in various market segments: semiconductor industry, medical technology, metrology, laser, and space technology as well as the display industry.
• Established in 1952
• 1,600 employees
• 542,500-sq ft facility
• Privately Owned
• Custom Manufacturer
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Deposition Sciences Inc. (DSI), Sub. of Lockheed Martin - Santa Rosa, CA
Produces a wide variety of high performance optical, magnetic, and solderable thin-film coatings. Our technologies and custom deposition chambers offer coatings for the UV through LWIR. Known for our strong engineering services, we seek to understand your needs and to provide creative solutions for real-world applications. ISO 9001:2015 certified.
• Established in 1985
• 60 employees
• 145,000-sq ft facility
• Publicly Traded Stock
• Custom Manufacturer
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Ferson Technologies Inc. - Ocean Springs, MS
Manufacturer of custom precision optical components including lenses, prisms, windows, mirrors, cylindrical lenses, filters, and domes. Capabilities include optical coating design and services, assembly and optical systems. Also will modify existing material or catalog optics to meet applications.
• Established in 1943
• 18 employees
• 20,000-sq ft facility
• Privately Owned
• Custom Manufacturer
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Glass Fab Inc. - Rochester, NY
Manufacturer of custom blanks. Products include fused quartz and silica, optical and filter glasses, and low/ultralow expansion glasses. Capabilities include annealing, slumping, sawing, grinding, edging, drilling, waterjet cutting, and CNC shaping and generating.
• Established in 1974
• 32 employees
• 31,000-sq ft facility
• Privately Owned
• Custom Manufacturer
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Gurley Precision Instruments Inc. - Troy, NY
Manufactures reticles, lenses, prisms, mirrors, resolution targets, step wedges, absolute and incremental discs/scales, patterns and replications, encoders, engineering and surveying instruments and digital readout systems for machine tools. UV to NIR optical coating capabilities include AR coatings, hot/cold mirrors, dielectric films.
• Established in 1845
• 100 employees
• Privately Owned
• Custom Manufacturer
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Isuzu Glass Inc. - Torrance, CA
Manufacture of integrated lens arrays, microlens arrays, aspheric lenses and condenser lenses by glass molding. Melting heat-absorbing and laser protection glass; and UV absorbing filters, ND filters, and colored glass filters.
• Established in 1905
• 80 employees
• Custom Manufacturer
UV Transmissing Filter - IHU Series
IR Cut Filter- ISK Series
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Knight Optical - North Kingstown, RI
Specializes in supplying precision custom and stock optical and optomechanical components; all custom optics to customer specifications. Products include lenses, prisms, filters, mirrors, retarders, diffusers, and more. Knight Optical conducts a full QA inspection of your optics from our ISO 9001:2015-certified, state-of-the-art metrology lab.
• Supplier/Distributor
Neutral Density Filters
ANPR/ALPR Filters
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Lambda Research Optics Inc. (USA) - Costa Mesa, CA
Lambda Research Optics manufactures catalog and custom lenses, mirrors, beamsplitters, windows, prisms, filters, polarizers for defense, commercial, and medical laser applications. Lambda specializes in high-power coatings for excimer, YAG, fiber, CO2 lasers, and FLIR coatings. Precision polishing of CaF2, MgF2, BK7, fused silica, ZnSe, Ge, and Si.
• Established in 1991
• 60 employees
• 36,000-sq ft facility
• Privately Owned
• Custom Manufacturer
UV Reflective Neutral Density Filters
Absorptive Neutral Density Filters
Visible & NIR Neutral Density Filters
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National Photocolor Corp. - Mamaroneck, NY
Manufacturer of thin-film pellicles for use as beamsplitters, beam combiners, attenuators, filters and optical windows. Standard items, uncoated and coated, are available from inventory; special frames, coatings, flatness, transmission and documentation are available for custom applications.
• Established in 1932
• 7 employees
• 4,000-sq ft facility
• Privately Owned
• Stock Manufacturer
• Custom Manufacturer
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OPCO Laboratory Inc. - Fitchburg, MA
Manufacturer of custom optics, optical replication, diffraction gratings, electro-optical assemblies, metallic and dielectric thin-film coatings for prototype and volume production. State-of-the-art manufacturing, coating, QC, assembly and class 1000 cleanrooms. Serving commercial and defense markets worldwide.
• Established in 1983
• 25 employees
• Privately Owned
• Custom Manufacturer
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Rainbow Research Optics Inc. - Centennial, CO
Manufacturer of precision optical components and high-power laser coatings from UV to IR. Stock and custom optics: lenses, beamsplitters, filters, windows, mirrors, wave plates, large wedges, prisms, and many more. In-house custom coatings: AR, high reflection, dichroic, and polarizing. Optics from 4 mm to 16 inches.
• Established in 1995
• 75 employees
• 29,234-sq ft facility
• Privately Owned
• Custom Manufacturer
• Designer
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Spectrogon US Inc., Sub. of Spectrogon AB - Mountain Lakes, NJ
Designer and manufacturer of interference filters: narrow and broad bandpass, long- and shortwave, ND filters, atmospheric windows, AR and metallic coatings. Holographic diffraction gratings: plano, concave and blazed, pulse compression/stretcher gratings. WDM and telecom applications include diode laser tuning gratings and network communications gratings.
• Established in 1975
• 3 employees
• 1,000-sq ft facility
• Privately Owned
• Stock Manufacturer
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Sydor Optics Inc. - Rochester, NY
Custom manufacturer of precision flat-surfaced, parallel and wedged optics specializing in double-sided polishing for exceptional transmitted wavefront and parallelism. Products include windows, wafers, filters, mirrors, plate beamsplitters, wedges and witness samples. ITAR registered, ISO 9001:2015 certified.
• Established in 1964
• 92 employees
• 40,000-sq ft facility
• Privately Owned
• Custom Manufacturer
Custom Optical Filters
Additional Companies

Market Data for Companies in This Category
Countries
43
United States:
5
China:
5
Germany:
3
England:
2
Sweden:
OTHER: 4
US States
16
California:
7
New York:
4
Massachusetts:
3
New Jersey:
3
Pennsylvania:
OTHER: 29
Capabilities
43
Custom Manufacturers:
18
Stock Manufacturers:
6
Suppliers/Distributors:
1
Designer:
Average Number of Employees: 67


The Photonics Buyers' Guide is a comprehensive resource for verified providers of Neutral Density Filters. Profiles and contact information for manufacturers and suppliers are provided by the companies and verified by our editors. If you have updated information about any of the organizations listed, please contact us.
Glossary
  • neutral density filter A light filter that equally decreases the intensity of all wavelengths of light without altering the relative spectral distribution of the energy.
  • light filter A homogeneous optical medium or coating that transmits only in particular regions of the spectrum. It is used to change or modify the total or relative energy distribution of a beam of light.
light filtergray filterfilters neutral densityoptical filterfilters light intensitydecrease light intensityopticsnd filters
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