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Stephen P Obenschain

from Springfield, VA
Age ~75

Stephen Obenschain Phones & Addresses

  • 7520 Hamlet St, Springfield, VA 22151 (703) 569-7453
  • Greenbelt, MD

Work

Position: Executive, Administrative, and Managerial Occupations

Education

Degree: Associate degree or higher

Publications

Us Patents

Controllable Spatial Incoherence Echelon For Laser

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US Patent:
45210756, Jun 4, 1985
Filed:
Mar 7, 1983
Appl. No.:
6/472690
Inventors:
Stephen P. Obenschain - Springfield VA
Robert H. Lehmberg - Alexandria VA
International Classification:
G02B 518
H01S 313
G21B 100
US Classification:
35016211
Abstract:
A system for achieving very uniform illumination of a target. A beam of broadband spatially-coherent light is converted to light with a controlled spatial incoherence and focused on the target. An echelon-like grating breaks the beam up into a large number of differently delayed beamlets with delay increments larger than the coherence time of the beam, and a focusing lens overlaps the beamlets to produce at the target a complicated interference pattern modulated by a smooth envelope that characterizes the diffraction of an individual beamlet. On time scales long compared to the coherence time, the interference pattern averages out, leaving only the smooth diffraction envelope.
Stephen P Obenschain from Springfield, VA, age ~75 Get Report