Optical Filters

OPTICAL FILTERS WHITE PAPERS AND CASE STUDIES

Specifying Surface Figure And Wavefront Distortion For Multi-layer Optical Filters
Specifying Surface Figure And Wavefront Distortion For Multi-layer Optical Filters Optical filters are used in many applications and the surface figure and wavefront distortion requirements of filters are dependent on where and how they are used. If filters are only used in sensing applications with very tolerant detector geometries, there may be no need, in practice, to put any constraints on the surface figure or wavefront distortion. This white paper helps the reader understand where, when, how, and how much to specify...  Continue Reading...
Large-Format, Narrow Band Pass Filters (NBPF) – A Uniformity Challenge
Large-Format, Narrow Band Pass Filters (NBPF) – A Uniformity Challenge Within so many diverse optical filtering applications, large-format (>100 mm diameter), narrow bandpass filters (NBPF) are required to be used alongside large collection optics in order to facilitate specific and selective analysis of a phenomena or the substance of interest.  Continue Reading...
Specifying Optical Filters for Sensor Applications Each sensor application has its own subtleties that need to be addressed in order to choose the appropriate optical filters for each sensing task. This application note discusses the critical parameters for bandpass filters that are to be used for sensor applications, including considerations on in-band transmission, band edge placement, and out-of-band blocking.  Continue Reading...
Using Next-Generation Thin-Film Optical Filters For Fluorescence Imaging And Detection Systems
Using Next-Generation Thin-Film Optical Filters For Fluorescence Imaging And Detection Systems Within any fluorescence application, there are three basic filters that are needed for operation – the excitation filter, the emission filter, and the beamsplitter. Hard-coated, thin-film optical filters are the best choice for these filters in that they provide the highest standards such as improvements in transmission, blocking, and both transmitted and reflected wavefront properties, which translates into bright, high-contrast images,...  Continue Reading...
Enhancing Endoscopy With Optical Filters
Enhancing Endoscopy With Optical Filters While white-light reflectance (WLR) imaging has become the standard for in vivo diagnosis using “conventional endoscopy,” this white paper details three alternatives — or supplements — to WLR that leverage the wavelength selectivity provided by optical filters.  Continue Reading...
BOROFLOAT & Optical Mirrors: A Union of Inspiration & Quality
BOROFLOAT & Optical Mirrors: A Union of Inspiration & Quality This white paper introduces BOROFLOAT, the world’s first borosilicate glass by SCHOTT, explains how it is used in the Hobby Eberly Telescope (HET), and describes its exceptional optical and thermal properties.  Continue Reading...
Clear The Air: New Optical Filters For Sensors And Detectors
Clear The Air: New Optical Filters For Sensors And Detectors Environmental air quality; proximity control; crowd counting; climate change; the “Internet of Things”.  Our world has become an increasingly monitored place where the proliferation of sensors and detectors allows us, and our devices, to better understand and interact with our environments.    Continue Reading...
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OPTICAL FILTERS PRODUCTS

Optical Filters For LiDAR Laser Sensors Optical Filters For LiDAR Laser Sensors

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.

Space And Specialty Optical Filters For Earth Observation Space And Specialty Optical Filters For Earth Observation

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.

Satcom Optical Filters And Coatings Satcom Optical Filters And Coatings

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.

Imaging Color Filters Imaging Color Filters

Iridian Spectral Technologies has designed and manufactured a wide range of dielectric optical filters for imaging and machine vision applications. Featuring steep edges, high transmission values, and high durability, these color filters can be used to improve contrasts, and isolate spectral regions and colors in images.

Specialized Coating Processes Specialized Coating Processes

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.

Test, Measurement And Support Services Test, Measurement And Support Services

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.

Glass Machining Glass Machining

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.

Optical Filters Optical Filters

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.

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OPTICAL FILTERS NEWS

  • Remote Sensing With LiDAR Requires Optical Filter Trade-Offs
    Remote Sensing With LiDAR Requires Optical Filter Trade-Offs

    Engineers and designers working on LiDAR applications should consider critical filter issues early on.

  • LiDAR And Optical Filters – Helping Autonomous Vehicles See More Clearly
    LiDAR And Optical Filters – Helping Autonomous Vehicles See More Clearly

    The evolution of sensing and imaging systems, combined with the desire to create safer, more efficient transportation systems, is driving the development of autonomous vehicles. LiDAR is a key technology that will eventually help carry this growth through to “Level 5” autonomy.

  • The Right Filter Is Key To Lower-Cost And Faster Time-To-Market MWIR Equipment
    The Right Filter Is Key To Lower-Cost And Faster Time-To-Market MWIR Equipment

    Midwave (MWIR) infrared light is important in many hardware applications and optical filters are critical to success. Some simple practices can help avoid over specifying filter characteristics and driving up costs.

  • How To Specify A Filter
    How To Specify A Filter

    In general, typical filter optical specifications will include the wavelength ranges over which to reflect and transmit light, clear aperture of the filter, the polarization state of light for non-normal angles of incidence, light coherency (laser or white light), optical beam size and cone angle of light, and more. 

  • Opto Diode Introduces 13.5 nm Directly-Deposited  Thin-Film Filter Photodetectors
    Opto Diode Introduces 13.5 nm Directly-Deposited Thin-Film Filter Photodetectors

    Opto Diode Corporation, an ITW company, introduces the SXUV100TF135 and SXUV100TF135B photodiodes with integrated thin-film filters. The detectors each feature a 100 mm2 active area and a directly-deposited thin-film filter for detection between 12 nm and 18 nm. Both detectors have typical responsivity of 0.09 A/W at 13.5 nm and are optimized for different electrical performance. The photodiodes are ideal for use in applications such as laser power monitoring, semiconductor photolithography, and metrology systems that utilize extreme ultraviolet light.

  • Frequently Asked Questions: Optical Thin Film Filters
    Frequently Asked Questions: Optical Thin Film Filters

    This article answers an array of frequently asked questions about optical thin film filters. It provides in-depth information on what they are, how they are created, how they perform, and what to look for when selecting an optical thin film filter supplier.

  • Modified Double-Slit Experiment Achieves Widest Degree Of Optical Spatial Coherence
    Modified Double-Slit Experiment Achieves Widest Degree Of Optical Spatial Coherence

    Researchers at Brown University have demonstrated a new method of modulating the coherence of light by using surface plasmon polaritons in metal films. This technique represents an alternative way to engineer flat optical elements that could be applied in optical communication, beam shaping, and microscopic imaging.

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OPTICAL FILTERS VIDEOS

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