Optical Filters

OPTICAL FILTERS WHITE PAPERS AND CASE STUDIES

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High-Quality Molded Glass For Various Application Technologies
Isuzu Glass offers optical filters for applications in opto-electronics, office automation equipment, photography, lighting, and medical equipment. This white paper discusses the IHU series, which can be used as a substitute for fused silica because of its UV transmission properties.  Continue Reading..
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New Metrology Techniques For Advanced Thin Film Optical Filters
Alluxa’s thin film optical filter technology has advanced to the point where the spectral slopes and blocking levels are challenging even the best metrology equipment and techniques. This paper discusses the issues and provides solutions to measuring the spectral response of this new class of high performance filters.  Continue Reading..
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Flat Top, Ultra-Narrow Bandpass Optical Filters Using Plasma Deposited Hard Oxide Coatings
 Alluxa’s new class of ultra-narrow filters are designed for applications such as laser clean up, LIDAR, telecommunications and instrumentation and offer the narrowest and “squarest” filter profiles in the visible and NIR as well as transmission levels that approach 100%.  Continue Reading..
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Specifying Plasma Deposited Hard-Coated Optical Thin Film Filters
This paper defines major filter types and discusses how to specify key attributes while also optimizing cost. The filter types discussed include band pass types of ultra-square high cavity count, ultra-narrow and soft coating replacements, and dichroic and polychroic tilted beamsplitter filters.  Continue Reading..
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Advanced Plasma Deposition Improves Ultra Narrowband Optical Filters
Narrowband filters are a critical technology for a variety of applications such as lidar (light detection and ranging), laser cleanup, chemical and gas sensing, instrumentation, and astronomy. Creating multicavity filters is a challenge for deposition process control systems. It invariably introduces undesirable ripple, resulting in signal loss in the pass band, the spectral range over which the filter has high transmittance. Alluxa uses a...  Continue Reading..
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Ultra-Narrowband Optical Bandpass Filters With Large Format And Improved Temperature Stability
Hard coated ultra-narrowband optical filters made using modern plasma processes offer much improved transmission, temperature stability and out of band blocking as compared to legacy soft coatings. These filters are used in optical systems as diverse as LIDAR (light detection and ranging), Doppler shift detection of plasma velocity, laser cleanup, chemical and gas sensing, as well as for cutting-edge astronomy and instrumentation applications.  Continue Reading..
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Multiband Filters Redefine Performance Standards Across Disciplines
Advances in thin-film technology have given rise to new classes of multiband filters that redefine performance standards and drive innovation across a variety of disciplines. Multiband filters can be categorized into a variety of classes that each presents its own set of fabrication challenges, placing limits on what is practically achievable and affecting the reliability of the thin-film manufacturing process. By understanding the scientific...  Continue Reading..

OPTICAL FILTERS PRODUCTS

At Alluxa, we are continually striving to improve our products by researching and developing novel thin-film technologies. Therefore, we welcome any custom optical filter requests for non-standard spectral shapes, unusual coating materials, tunable filters, extreme blocking, or any other challenging technical specifications.

Iridian Spectral Technologies offers LiDAR laser sensor systems with common laser wavelengths including 532 nm, 905 nm, 1064 nm, and 1550 nm. These filters provide more signal with less background and are ideal for laser sensor applications, including airborne laser scanning and other methods of capturing 3D data of large areas.

In astronomical observations, optical filters are able to provide the wavelength selectivity needed to enable telescopes to discriminate signal from background information. These filters often require larger sizes, higher uniformity, and excellent surface quality and surface figure.

Iridian offers over 20 years of experience in producing industry leading optical telecommunication and datacom filters for terrestrial systems. Commercial satcom networks will consist of constellations of 100’s to 1000’s of satellites in an interconnected low earth orbit (LEO) mesh. Many of these systems rely on an optical intersatellite link (OISL) architecture to connect satellites via laser based optical communications. Optical filters provide wavelength selectivity to these systems addressing different functional needs from solar rejection windows to beam steering wavelength selective dichroic filters.

DSI provides three specialized coating process technologies designed to accommodate the many demands placed on thin film coatings. Each process offers the ability to provide unique solutions, higher performance, increased volume, and much more durable coatings.

DSI offers its expertise on high quality testing capabilities for many types of resources such as in-house produced materials, as well as independent verification of external coated and uncoated samples for vendor/supplier surveillance, process analysis, and qualification testing. Each quality system is ISO 9001:2008 certified and ITAR registered and compliant. Environmental testing is also available and is performed in accordance with military specifications.

Abrisa Technologies offers a broad spectrum of glass machining services that can fit nearly every application-specific customer requirement. With CNC processing and other glass fabrication equipment, this company can manufacture a wide variety of glass parts ranging from simple to the most complex designs. Some of the offered processes performed in-house include notching, slotting, grooving, edge grinding, stepped surfaces, hole drilling, circle grinding, polishing, and sandblasting.

Acton Optics & Coatings offers bandpass, band rejection, long pass, neutral density, reflective, and solar blind filters for spectroscopy, elemental analysis, environmental monitoring, biotechnology instrumentation, space exploration, and in general research areas.

OPTICAL FILTERS NEWS

  • The Application Of WDM Channel Skip Filters

    Channel skip filters enable precision band splitting in telecommunications options, offering improved performance over edge pass filters at a cost adaptable to any project budget.

  • Discover The New Bandpass Filter BP 850-80 HT From Schneider-Kreuznach

    Schneider-Kreuznach is pleased to present the new BP 850-80 HT infrared filter as an addition to its range of bandpass filters. This filter has been specially developed for applications with powerful infrared high-power LED’s (850nm), which are becoming increasingly popular. Cameras equipped with these LED’s can deliver night-time images up to 20-30 meters. The Schneider-Kreuznach infrared filter in combination with an 850nm LED light source produces strong and shadow-free infrared illumination that is visible to many sensors but invisible to the human eye. Therefore, it is perfectly suitable for the use in surveillance systems and industrial applications.

  • Advantages Of Multiple Band Pass Filters In Telecommunications Applications

    Multi band filters help optimize price-performance balance while also conserving space, simplifying design, and improving (or offering equivalent) performance versus single band filters.

  • What Are Thin-Film Optical Filters?

    Thin-film optical filters are made by depositing alternating thin layers of materials with special optical properties onto a substrate, such as optical-grade glass. As light makes its way through the optical filter, its direction changes as it passes from one layer to the next, resulting in internal interference.

  • Fiber Optics Can Do That?

    Rigid and flexible fiber optic image guides offer a powerful way to manipulate image planes and achieve remote viewing.

  • Hybrid Gain Flattening Filters In Optical Fiber Amplifiers

    Hybrid GFFs save space, simplify system layouts, cost less than a two-filter setup, and offer unparalleled reliability. Meet the new standard in optical fiber amplifier components.

  • What Is A UV Filter?

    A UV blocking filter or ultraviolet optical filter prevents ultraviolet light transmission. UV filters are commonly used in photography to reduce the level of ultraviolet light that strikes the recording medium.

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