Anti-Reflective Coatings Round Rock

sales@opticalfiltersource.com

sales@opticalfiltersource.com
16920 Joe Barbee Dr. Bldg. 2, Round Rock, TX 78664
512-248-0605

sales@opticalfiltersource.com

16920 Joe Barbee Dr. Bldg. 2, Round Rock, TX 78664

512-248-0605

Be sure to visit us at Booth 4158 in the North Hall

2/4/2020 Thru 2/6/2020

Band Pass Filter

ITO and Silver

Patterned ITO

Viewports

Anti-Reflective Coatings

Anti-Reflective coatings (AR coatings) increase the light throughput of an optic by decreasing the light reflected from an optical surface. This type of coating is critical in optical systems to increase the transmission and contrast of the image while reducing stray light and ghost images.

Most AR coatings are durable, cleanable, and resistant to environmental and physical damage. These coatings will meet the durability requirements in MIL-C-675C or MIL-PRF-13830B.

Optical Filter Source can provide AR coatings to service the UV – MWIR wavelengths with special emphasis on the visible, NIR, and SWIR wavelength ranges.

Applications: LIDAR, Cameras, Laser Systems, Scopes, Various Windows, Optical Setups, Glare Reducing Windows

OFS Terms of Purchase

OFS Terms of Sale

High Reflector

High reflector coatings can be used to efficiently move light through a system while keeping the optical layout contained to a manageable size. High reflectors come in three basic flavors. The first is an all metal coating or first surface mirror. The second is an all dielectric stack. The third is some sort of hybrid coating with both metal and dielectric layers.

Applications: LIDAR, Cameras, Laser Systems, Optical Setups, Laser Cavity Mirrors

Metal High Reflectors

Metal high reflector coatings are widely used due to their high reflectance, cost effectiveness, and broad band efficiency. Metals like aluminum, silver and gold work well in the UV, Visible, and IR. These coatings usually perform well over most of the spectrum and the reflectance they can achieve is often acceptable in most applications. These coatings can be used as first surface mirrors or internal mirrors. These coatings can be protected with a small dielectric layer to improve cleanability and durability.

Metal reflectors lose very little reflectance over various angles of incidence and they are fairly polarization independent.

Dielectric High Reflectors

Multilayer high reflector coatings provide a useful alternative to metal reflectors. In general, dielectric reflectors will have a narrower bandwidth, but the reflectance will be much greater. These coatings are ideal for systems that require high efficiency through the whole system, or high fluence systems where light absorption could result in damage or failure of the optic. These coatings will often meet the durability requirements in MIL-C-675C or MIL-PRF-13830B.

Dielectric reflectors are more sensitive to changes in angles of incidence and they are more polarizing. This can be used to create polarizing high reflectors as steeper angles.

Hybrid Reflectors

Sometimes the best approach is to use the benefits from both metal and dielectric coatings. This allows for high reflectance and good durability with a relatively low number of layers. This will also allow the metal layer to be protected by one or more dielectric layers. This includes everything from protected to enhanced metal coatings.

Because the final layers are dielectric, hybrid reflectors are more sensitive to changes in angles of incidence and they are more polarizing.

Partial Reflector

Like the high reflector coatings, partial reflector coatings can be done with metal, dielectrics, or both. These coatings are used to reflect some fraction of the incident light and pass or absorb the rest.

Applications: Beam Splitters, Augmented Reality Lenses, Optical Setups

Edge Filters

Long Wave Pass Filters

Long Wave Pass (LWP) filters block or reflect light up to a certain cut on wavelength and then they pass the light beyond that point. A simple example might be a filter that blocks blue and green light and passes red light. These can be used to filter out undesired short-wave light or pass it elsewhere in the optical system. Another use of this technology is filtering out UV, Vis, and NIR light while passing SWIR light.

Applications: UV Blocking for Vision Applications, NIR Imaging, SWIR Imaging, Optical Setups

Short Wave Pass Filters

Short Wave Pass (SWP) filters pass light up to a certain cut off wavelength and then they block or reflect light beyond that point. A simple example might be a filter that passes blue and blocks green light and red light. These can be used to filter out undesired long-wave light or pass it elsewhere in the optical system.

Applications: IR blocking Filter for Heat Reduction (Hot Mirror), Optical Setups

Band Pass Filter

Band Pass (BP) filters only allow a specified band of light to pass and light outside of that range is rejected. These filters are useful for purging a system of all unwanted light and ensuring the output spectrum is clean.

Applications: Laser Systems, Signal to Noise Boosting, Optical Setups

Gain Flattening and Spectral Matching Filters

These are both custom shaped filters. These are usually specified to OFS with either a desired spectrum for the coating, or a desired output for the system. An example might be attempting to match the output spectrum from the sun with a light bulb while considering the quantum efficiency of the camera in the system. The key to these coatings is careful communication and ensuring that the design work makes sense before moving forward.

Applications: Spectral Conversion, Spectral Flattening, Optical Setups

Gain Flattening Filters

These filters usually require a desired spectral output along with the performance of the other elements in the system. OFS has done several of these systems, along with custom metrics to ensure that the desired performance is achieved.

Spectral Matching Filters

Spectral matching filters also have a desired spectral performance, but it is only for the optic itself. We will supply a coating design to match the specifications given.

ITO

OFS specializes in Transparent Conductive Oxides (TCOs) and especially Indium Tin Oxide (ITO). We have thousands of hours of run time on ITO and a robust data set to match it. We have coated static dissipative coatings, EMI coatings, solderable heater windows, patterned transparent circuits, index matched ITO and more. We have experience putting ITO on a variety of substrates as well including glass, metal, filter glass, and sapphire. In combination with our solderable gold OFS can create fully solderable heater windows or hermetically sealable windows with a gold annulus on the exterior rim.

Applications: EMI/RFI Window, Biomedical, Displays, Camera Heater Window, Optical Setups

Bare ITO

OFS can deposit bare ITO for static dissipation, Electro Magnetic Interference (EMI), and optical windows that do not have strict requirements on optical performance. Bare ITO is relatively robust and is usually specified with a transmission requirement and a resistivity requirement.

Index Matched ITO

Index Matched ITO (IMITO) is frequently used to increase the optical performance of the ITO coated part. This can be used with a heater window to have a high transmission window with a closed loop heater package, or any application where the optic needs more transmission, but ITO is still required.

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Neutral Density Coatings

Neutral density filters use a special metal blend that is spectrally neutral across a broad band. This in turn creates spectrally flat coatings with a specified amount of transmittance. This can range from an optical density of 0.04 to 4. In general OFS specifies a target wavelength and a target transmittance.

Applications: Signal Reduction, Optical Setups, Laser Safety

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Durable Scatter Coating

An OFS exclusive coating, the Durable Scatter Coating (DSC) is a cleanable, patternable, diffuse white coating. This can be used to diffusely reflect any light incident on it, and it is particularly useful for targets and reticles.

Applications: Recitals, Targets

Solderable Gold

Due in most part to the success of our ITO, OFS has an excellent solderable gold coating. OFS has a few unique steps to ensure adhesion, and the result is a solderable gold coating which has extremely good adhesion and conductivity.

Applications: Buss Bars, Bonding

Optical Filter Source, LLC

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512-248-0605

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16920 Joe Barbee Dr. Bldg. 2, Round Rock, TX 78664

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