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Products

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Anti-Reflection (AR)

These coatings reduce the reflection from the surface of an optic. They are used to increase the throughput of the optical system and to reduce ‘ghosting’ and parasitic back reflections in an optical system.

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Ball Lenses

Ball lenses are spheres of optical glass ranging in size from 0.250 mm to 25 mm. They are used as fiber interconnects in telecom and expanded beam connectors. Large ball lenses have been successfully used as collectors in LED lighting systems and medical devices.

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Bandpass Filters

A filter that has high transmission in one spectral region and low transmission at longer and shorter wavelengths. Bandpass filters are commonly used to trim the output of a light source or the input of a detector.

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Beamsplitters

Beamsplitters selectively reflect a percentage of light and transmit a percentage of light.

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CCD Filters

These filters are designed to improve the performance of CCD (charge-coupled device) chips. They act to trim the input to a CCD chip, reducing noise in a system.

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Coatings on Plastics

DSI offers extremely durable, non-absorbing, and complex thin film coatings on plastics. Single band, multi-band, and wide band multi-layer, anti-reflection coatings on engineered plastics are utilized in medical optics, UAV sensor suites, telecom, CPV solar systems, and more.

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Color Control

These filters are used to change the color of a light source.

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Covert Filters

Covert filters transmit infrared (IR) wavelengths and reflect or absorb visible light. They allow an area to be illuminated with infrared light so it can be viewed with night vision equipment or IR cameras.

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Dark Mirrors

A dark mirror is a low reflective, low transmissive filter. Dark mirrors are used as the base for DSI Spectral Metal.

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Dichroic Filters

Dichroic, meaning two color, filters reflect certain wavelengths of light and transmit other wavelengths of light. These filters can be manufactured to reflect short wavelengths of light and transmit the longer wavelengths or transmit the shorter wavelengths and reflect the longer wavelengths.

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DSI Sunshade

A thermally insulating, broadband electromagnetic transmitting shield for satellite systems.

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Edge Filters

These are dichroic filters with specific requirements for the placement and slope of the band edge.

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Heat Resistant Coatings

Coatings that can withstand either high temperature spikes or high continuous operating temperatures. DSI calls this line of coatings by the trade name Heatbuster®.

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Heatbuster® Cold Mirrors

A cold mirror reflects short wavelengths and transmits longer wavelengths. It functions as a mirror to the ‘cold’ or short wavelengths.

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Heatbuster® Hot Mirrors

A hot mirror reflects long wavelengths and transmits shorter wavelengths. It functions as a mirror to the ‘heat’ or long wavelengths.

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High Laser Damage Threshold Coatings

DSI’s new line of high laser damage threshold (LDT) coatings is designed for use with lasers and other high energy systems. They are ideal for use in diode, diode-pumped solid-state (DPSS), and gas lasers.

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Infrared (IR) Coatings

Coatings that operate beyond the visible spectrum, typically from 800 nm to 50 µm.

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ITO & IM ITO

A family of indium tin oxide (ITO) coatings that transmit wavelengths of light and are electrically conductive. IM ITO (index-matched ITO) coatings are matched into the exit medium to yield higher transmission. Common applications are electro-static discharge and window heaters.

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Long Wavelength Infrared (LWIR) Filters

DSI has had many years of experience making LWIR filters that operate at any temperature between ambient and 10°K. These coatings are durable and robust optical filters, made using physical vapor deposition. The band edge placement can be held with great precision.

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Low Temperature Shift IR Bandpass Filters

Infrared coatings experience a shift in spectral placement with changes in temperature. For example, a relative center wavelength (CWL) shift of 100 ppm / ˚C is common for narrow bandpass (NBP) filters in the 3 to 18μm wavelength region. DSI’s “Low Temperature Shift” IR coatings shift approximately half the amount of “Standard” IR coatings.

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Metal Coatings

Coatings comprised of metals. Commonly deposited metals include, gold, silver, nickel, chrome, and aluminum.

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Multispectral Optical Filter Assembly

DSI is offering optical assembly technology that combines individually coated filter substrates into an array assembly. These array assemblies range from a two-filter stack to an eight-filter stack or more and can employ a variety of adhesives, including space-qualified adhesives.

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Neutral Density Coatings

A coating that has a relatively flat absorption curve throughout a section of the spectrum.

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Notch Filters

A coating that has high reflection in a narrow portion of the spectrum and high transmission at shorter and longer wavelengths. A common application is laser eye protection.

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Optical Mirror

A reflective optical device.

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Patterned Dichroic Filters

Optical filters that have a pattern in the filter. Patterned optical filters are typically manufactured using photolithography. Patterned dichroic filters are used in multispectral and hyperspectral systems.

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Rugate Filters

A type of notch filter that contains multiple notches. Rugate filters are used primarily for laser eye protection.

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Spectral Metal Coatings

The DSI trade name for a family of coatings on metal that selectively reflect and absorb light. Spectral Metal can be cut and formed after coating, allowing the system designer to use complex concave shapes within a low cost system. Spectral Metal is used in the UV printing and curing industry, medical imaging and LED systems.

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UV Blocking Filters

These filters block the ultraviolet (UV) and transmit the visible spectrum. These filters are used to prevent UV adhesives from curing prematurely, to slow spoilage in fresh produce, and to protect fine artwork.

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Very Long Wavelength Infrared Filters

DSI’s very long wavelength infrared (VLWIR) filters provide high transmittance over the 12μm to beyond 22μm wavelength region. These coatings readily pass all standard environmental tests, and can be repeatedly cycled between ambient and cryogenic temperatures without degradation.

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Visible Filters

These are filters that operate in the visible spectrum between 400 nm and 780 nm.

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