Patterned Coatings for Aerospace

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Opto-Line’s coatings have withstood the test of time and the elements of space.  Opto-Line has provided various custom patterns typically utilizing our low-reflecting black chrome. For Aerospace applications, our precision pattern and coatings are often found in systems created by the most well-known companies.   Many of our aerospace reticles are used in sun angle sensor systems on satellites.  Our durable black chrome has a Rave <5% over the visible spectrum and has been a tried-and-true coating for decades.  But it is not only the coating that separates Opto-Line from other companies but the precision we can accomplish in the detailed patterns.  Please contact us to find out how we can partner with you on your next project.


A sun sensor is a device to measure the incident angle of the sun rays when they go through a small window. Thanks to this characteristic, the sensor can measure the Sun position or other light sources regarding to the sensor position.

The sun sensor is operated based on the entry of light into a thin slit on top of a rectangular chamber whose bottom part is lined with a group of light-sensitive cells. The chamber casts an image of a thin line on the chamber bottom. The cells at the bottom measure the distance of the image from a centerline and determine the refraction angle by using the chamber height.

The cells are operated based on the photoelectric effect. They convert the incoming photons into electrons and hence voltages which are in turn converted into a digital signal. When two sensors are placed perpendicular to each other, the direction of the sun with reference to the sensor axes can be calculated.

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