Sterling Precision Optics, Inc.

Optical Filters transmit light of different wavelengths to attenuate or enhance an image and to transmit or reflect specific wavelengths. All Optical Filters pass, absorb, andor reflect light. There is a large variety of Optical Filters available from Sterling Precision Optics, Inc. Here is a listing of the most commonly used in the optical industry today

Sterling Precision Optics, Inc. is an industry leader for the supply of NVG filters to the Night Vision Industry; Sterling offers a wide range of monolithic glass Night Vision Filters which meet the U.S. Military specification MIL-STD-3009. Sterling also offers NVG Filters for the new and expanding Light Emitting Diode (LED) technology which is being adopted for military and aerospace applications. The new NVG Filter Glass meets MIL-STD-3009 at a reduced weight through decreased thickness of the filter. Night vision, also known as image intensification, allows humans to see in low to zero light conditions. Night vision is made possible by a combination of two approaches; sufficient spectral range, and sufficient intensity range. A device (NVD) works by collecting photons through a lens (NVIS). Then they pass through a photocathode which converts the photons into electrons. These electrons then pass through a microchannel plate, consisting of millions of closely spaced channels. In here the electrons can hit the walls so they will release thousands of additional electrons. Finally, the multiplied electrons will hit a phosphor screen where they get turned back into light. This light is thousands of times brighter than the original light and is in the visual spectrum of the human eye. The intensified light is in the same orientation as it came in providing a clear view of objects in the dark.