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Photonics Buyers' Guide
Neutral Density Filters
4-Axis CNC Micromachining, Precision Lapping, Polishing, Dicing and Coatings
Precision Glass and Sapphire Optics
Ultra-Flat Dichroic & Polychroic Filters
Master Bond Super Gel 9
Mid-IR Optical Isolators
High Temperature Coatings
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.
Spectrogon US, Inc., Sub. of Spectrogon AB - Mountain Lakes, NJ
Designer and manufacturer of interference filters: narrow and broad bandpass, long wave and short wave, ND filters, atmospheric windows, AR and metallic coatings. Holographic diffraction gratings: plano, concave and blazed, pulse compression/stretcher gratings. WDM and telecommunication...
Reynard Corp. - San Clemente, CA
Supplies custom and standard optical components and thin-film coatings 0.2 to 50 microns (UV-FAR IR) to demanding specifications for military, aerospace, medical and telecommunication applications. In-house services include design, optical and mechanical fabrication, photolithography processing,...
Glass Fab Inc. - Rochester, NY
Manufacturer of custom blanks. Products include fused quartz, fused silica, optical glasses, filter glasses, and low/ultralow expansion glasses. Capabilities include annealing, slumping, sawing, grinding, edging, drilling, water jet cutting, CNC shaping and CNC generating.
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 for all industries. Products include assemblies, beamsplitters, filters, lenses (achromatic, cylindrical, spherical), mirrors (cylindrical, flat,...
Acton Optics & Coatings/Princeton Instruments, Division of Roper Industries - Acton, MA
Acton Optics & Coatings provides high laser damage threshold excimer and UV laser optics, Al and MgF2 broadband mirrors and coatings, VUV/UV optical filters, detector-enhanced coatings and assemblies. Acton has a reputation spanning 50 years working with researchers and engineers in disciplines...
Berliner Glas KGaA Herbert Kubatz GmbH & Co. - Berlin, Germany
Offers precision thin-film coated optical components, optomechanical and electro-optical assemblies and systems from design to production for semiconductor, industrial and medical applications, as well as customized measurement set-ups. Also offers technical glass refinement for displays. ISO...
Bond Optics, LLC - Lebanon, NH
Custom manufacturer of precision optical components and precision mechanical glasswork. Materials processed include fused quartz/silica, optical glass, filter glass, pyrex, Zerodur and ULE. Custom coating and interferometric testing services available.
China Daheng Group, Inc. - Beijing, China
Offers a wide variety of off-the-shelf and custom optics; optomechanical components including lenses, telecentric lenses, mirrors, prisms, filters, polarizing beamsplitters, gratings; and crystal optics. Designs and manufactures lens systems for CCDs, CMOS, projectors and scanners. Also offers a...
Chroma Technology Corp. - Bellows Falls, VT
Manufacturer of optical filters and coatings for biomedical instruments and imaging systems, fluorescence microscopy, astronomy, space exploration and chemical analysis.
Cosmo Optics, Inc. - Middletown, NY
Founded in 1957, Cosmo Optics is involved primarily in prototypes of optical components and assemblies for industrial and scientific use. Small-scale production is also frequently undertaken. Cosmos’ wide range of facilities enables fabrication, testing and assembly of the most intricate...
Esco Optics - Oak Ridge, NJ
US manufacturer of custom and standard optics for the UV, visible and IR wavelengths. In house production of lenses, windows, mirrors, blanks, prisms, filters and optical coatings. For over 50 years, we have proudly offered exceptional customer service, low prices and short lead times. ITAR...
Guernsey Coating Laboratories, Inc. - Ventura, CA
Supplier of vacuum deposited optical coatings including bandpass and neutral density filters, antireflection coatings, and thermal, electron-beam, ion-assisted and ion-sputtered thin films. Research and development of ultrastable films for optical and semiconductor applications.
Gurley Precision Instruments, Inc. - Troy, NY
Manufactures stock and custom reticles, lenses, prisms, mirrors, resolution targets, step wedges, divided circles, absolute and incremental discs/scales, precision patterns and replications, measuring devices, rotary/linear encoders, engineering and surveying instruments and digital readout systems...
Kentek Corp. - Pittsfield, NH
Offers laser safety eyewear, laser barriers and laser windows. Stock replacement parts for lasers and will rework laser crystals and laser components. Secure online shopping. Experienced technical sales staff for free consultation.
National Photocolor Corp. - Mamaroneck, NY
Manufacturer of thin-film pellicles for use as beamsplitters, beam combiners, attenuators, filters and optical windows. Standard items, both uncoated and coated, are available from inventory; special frames, coatings, flatness, transmission and documentation are available for custom applications.
OPCO Laboratory, Inc. - Fitchburg, MA
Full service manufacturer of high precision custom optics, optical replication, diffraction gratings, electro-optical assemblies, metallic and dielectric thin-film coatings for prototype and high volume production. State-of-the-art manufacturing, coating, QC, assembly and class 1000 cleanrooms,...
PFG Precision Optics - Ocean Springs, MS
Manufacturer of precision optical components from UV through mid-IR wavelengths. Components include prisms, windows, filters, wedges, mirrors, beamsplitters, and all types of singlet, doublet and triplet lenses. Electron and ion-assisted deposition coating services available. Prototype production...
Rainbow Research Optics, Inc. - Centennial, CO
Manufacturer of precision optical components and high-power laser coatings from UV to IR. Supplier of stock and custom optics. Products include lenses, beamsplitters, filters, windows, mirrors, wave plates, large wedges and prisms. In-house coatings include antireflection, high reflection, dichroic...
Rocky Mountain Instrument Co. (RMI) - Lafayette, CO
Rocky Mountain Instrument Co. is a fully integrated manufacturer of high quality photonics products. Capabilities include: custom optical fabrication, UV/visible/IR coatings, optical assemblies, DPSS laser systems (1064/532/355 nm) and ultracompact laser marking engines. RMI can handle OEM...
Valley Design Corp., Headquarters - Shirley, MA
Since 1975 Valley Design Corp. has been an industry leader in advanced materials processing, as providers of precision lapping, polishing, dicing, CNC machining, grinding and other precision machining services including slicing, backgrinding, wafer and die thinning, optical edge/angle polishing and...
Vogelin Optical Company, Inc. - Norwood Young America, MN
Manufacturer of precision optical components and assemblies for aerospace, avionic, defense, medical and space exploration applications. Supplier of glass and plastic edging and grinding services; and ceramic, porcelain and most optical material substrate fabrication and polishing.
Reynard Corp. - San Clemente, CA
AHF analysentechnik AG - Tuebingen, Germany
American Polarizers, Inc. - Reading, PA
Amity Photonics Inc. - Amity Harbor, NY
Anchor Optics, Division of Edmund Optics, Inc. - Barrington, NJ
Avian Technologies LLC - New London, NH
bk Interferenzoptik Elektronik GmbH - Nabburg, Germany
Cheshire Optical, Inc. - Keene, NH
Control Optics Corp. - Ontario, CA
Curtis Technology, Inc. - San Diego, CA
Elliot Scientific Ltd. - Harpenden, England
eSource Optics - Whitinsville, MA
Ferroperm Optics A/S - Vedbaek, Denmark
Filtrop AG - Balzers, Liechtenstein
Fotodyne, Inc. - Hartland, WI
Frontier Optics, Inc. - Tustin, CA
Goettinger Farbfilter GmbH - Bovenden, Germany
HEBO Spezialglas GBR - Aalen, Germany
Infinite Optics Inc. - Santa Ana, CA
International Micro Photonix Inc. - North Andover, MA
JG InterNational - Shanghai, China
Knight Optical (UK) Ltd. - Harrietsham, England
Koshin Kogaku Co., Ltd., Sub. of Yamaichi Electronics Co. Ltd - Hadano, Japan
Kryptronic Technologies - Munich, Germany
L&L Optical Services, Inc. - Santa Ana, CA
Lasnix - Berg, Germany
Maier Photonics, Inc. - Manchester Center, VT
Materion Barr Precision Optics & Thin Film Coatings - Westford, MA
Newport Corp. - Irvine, CA
Newport Industrial Glass, Inc. - Stanton, CA
ONTF-Optics For Science, Technology & Photography - Cherkassy, Ukraine
Optical Instrument Laboratory, Inc. - Houston, TX
Opto-Line International Inc. - Wilmington, MA
Precision Applied Science, LC - Ann Arbor, MI
Reichmann Feinoptik GmbH - Brokdorf, Germany
Republic Lens Co., Inc. - Bangor, PA
Schneider Optics, Sub. of Jos. Schneider Optische Werke GmbH - Van Nuys, CA
Scientific Optical Ltd. - St. Leonards On Sea, England
Shanghai HXF-LaiYi Precision Optics Co., Ltd. - Shanghai, China
Shanghai Optics - Clark, NJ
Spectrogon AB - Taby, Sweden
Spectrogon UK, Ltd., Sub. of Spectrogon AB - Glenrothes, Scotland
Spectrum Optical Sources, Inc. - Hackettstown, NJ
Sterling Resale Optics - Erie, CO
UQG Ltd. - Milton, England
neutral density filter
Also known as a gray filter. A light filter that decreases the intensity of the light without altering the relative spectral distribution of the energy.
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.
filters neutral density
filters light intensity
decrease light intensity
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