Predicting threshold and location of laser damage on optical surfaces

Patent · Thu Jan 01 00:00:00 EST 1987

OSTI ID:866260

Siekhaus, Wigbert ^[1]

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1. Berkeley, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as respresented by United States (Washington, DC)
• Patent Number(s): US 4667101
• OSTI ID: 866260
• Country of Publication: United States
• Language: English

Related Subjects

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/