Accession Number : ADD014535

Title :   Nonlinear Optical Protection against Frequency Agile Lasers.

Descriptive Note : Patent, Filed 4 Aug 88, patented 20 Mar 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : McDowell, Vaughn P

Report Date : 20 Mar 1990

Pagination or Media Count : 9

Abstract : An eye protection or equipment filter device protection from laser energy is disclosed. The device may be in the form of a telescope, binoculars, goggles, or constructed as part of equipment such as image intensifiers or range designators. Optical elements focus the waist of the beam within a nonlinear frequency-doubling crystal or nonlinear optical element or fiber. The nonlinear elements produce a harmonic outside the visible spectrum in the case of crystals, or absorb the laser energy in the case of nonlinear fibers. Embodiments include protectors for the human eye as well as filters for sensitive machinery such as TV cameras, FLIR systems or other imaging equipment. Patents. (jhd)

Descriptors :   *OPTICAL FILTERS, *PATENTS, *PROTECTIVE EQUIPMENT, BINOCULARS, CRYSTALS, ENERGY, EYE, FIBER OPTICS, FORWARD LOOKING INFRARED SYSTEMS, FREQUENCY AGILITY, GOGGLES, HUMANS, IMAGE INTENSIFIERS(ELECTRONICS), IMAGES, LASER SAFETY, NONLINEAR SYSTEMS, OPTICAL EQUIPMENT COMPONENTS, OPTICAL PROPERTIES, SENSITIVITY, TELEVISION CAMERAS, VISIBLE SPECTRA

Subject Categories : Protective Equipment
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE