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Beam splitter and method for generating equal optical path length beams

Patent ·
OSTI ID:1174467
;
The present invention is a beam splitter for splitting an incident beam into first and second beams so that the first and second beams have a fixed separation and are parallel upon exiting. The beam splitter includes a first prism, a second prism, and a film located between the prisms. The first prism is defined by a first thickness and a first perimeter which has a first major base. The second prism is defined by a second thickness and a second perimeter which has a second major base. The film is located between the first major base and the second major base for splitting the incident beam into the first and second beams. The first and second perimeters are right angle trapezoidal shaped. The beam splitter is configured for generating equal optical path length beams.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-98CH10886
Assignee:
Brookhaven Science Associates LLC (Upton, NY)
Patent Number(s):
6,611,379
Application Number:
09/768,597
OSTI ID:
1174467
Country of Publication:
United States
Language:
English

References (5)

Interferometry of wave fronts reflected off conical surfaces journal January 1983
Precise angle monitor based on the concept of pencil-beam interferometry conference July 2000
Sub-μrad angular stability measurements by use of long-trace-profiler-based systems
  • Qian, Shinan; Takacs, Peter Z.
  • SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.370088
conference November 1999
Improvements in the accuracy and the repeatability of long trace profiler measurements journal January 1999
Design Of A Long Trace Surface Profiler conference April 1987

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