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Title: Predicting threshold and location of laser damage on optical surfaces

Abstract

An apparatus useful in the prediction of the damage threshold of various optical devices, the location of weak spots on such devices and the location, identification, and elimination of optical surface impurities comprising, a focused and pulsed laser, an photo electric detector/imaging means, and a timer. The weak spots emit photoelectrons when subjected to laser intensities that are less than the intensity actually required to produce the damage. The weak spots may be eliminated by sustained exposure to the laser beam.

Inventors:
 [1]
  1. Berkeley, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
866260
Patent Number(s):
4667101
Assignee:
United States of America as respresented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
predicting; threshold; location; laser; damage; optical; surfaces; apparatus; useful; prediction; various; devices; weak; spots; identification; elimination; surface; impurities; comprising; focused; pulsed; photo; electric; detector; imaging; means; timer; emit; photoelectrons; subjected; intensities; intensity; required; produce; eliminated; sustained; exposure; beam; damage threshold; laser beam; pulsed laser; optical device; optical devices; optical surfaces; apparatus useful; laser intensities; surface impurities; laser damage; optical surface; various optical; age threshold; /250/

Citation Formats

Siekhaus, Wigbert. Predicting threshold and location of laser damage on optical surfaces. United States: N. p., 1987. Web.
Siekhaus, Wigbert. Predicting threshold and location of laser damage on optical surfaces. United States.
Siekhaus, Wigbert. Thu . "Predicting threshold and location of laser damage on optical surfaces". United States. https://www.osti.gov/servlets/purl/866260.
@article{osti_866260,
title = {Predicting threshold and location of laser damage on optical surfaces},
author = {Siekhaus, Wigbert},
abstractNote = {An apparatus useful in the prediction of the damage threshold of various optical devices, the location of weak spots on such devices and the location, identification, and elimination of optical surface impurities comprising, a focused and pulsed laser, an photo electric detector/imaging means, and a timer. The weak spots emit photoelectrons when subjected to laser intensities that are less than the intensity actually required to produce the damage. The weak spots may be eliminated by sustained exposure to the laser beam.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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