Optical: systems and elements – Glare or unwanted light reduction – Directional or angular discrimination
Reexamination Certificate
2007-07-20
2010-11-09
Pritchett, Joshua L (Department: 2872)
Optical: systems and elements
Glare or unwanted light reduction
Directional or angular discrimination
C359S601000
Reexamination Certificate
active
07828451
ABSTRACT:
Methods and apparatus are disclosed for occulting light. The occulter shape suppresses diffraction at any given size or angle and is practical to build because it can be made binary to avoid scatter. Binary structures may be fully opaque or fully transmitting at specific points. The diffraction suppression is spectrally broad so that it may be used with incoherent white light. An occulter may also include substantially opaque inner portion and an at least partially transparent outer portion. Such occulters may be used on the ground to create a deep shadow in a short distance, or may be used in space to suppress starlight and reveal exoplanets.
REFERENCES:
patent: 2009/0153938 (2009-06-01), Arenberg et al.
Cash, Webster, “Detection of Earth-Like Planets Around Nearby Stars Using a Petal-Shaped Occulter,” Nature, vol. 442, pp. 51-53, Jul. 6, 2006.
Cash, Webster et al., “Direct Studies of Exo-Planets With the New Worlds Observer,” Proceedings of SPIE, vol. 5899, 12 pages, 2005.
Copi, Craig J. et al., “The Big Occulting Steerable Satellite (Boss),” The Astrophysical Journal, vol. 532, pp. 581-592, Mar. 20, 2000.
Marchal, C., “Concept of a Space Telescope Able to See the Planets and Even the Satellites Around the Nearest Stars,” Acta Astronautica, vol. 12, No. 3, pp. 195-201, 1985.
Purcell, J. D. et al., “Coronagraph With Improved Scattered-Light Properties,” J. Opt. Soc. Am., vol. 47, pp. 596-597, 1957.
Seager, S., “The Search for Extrasolar Earth-Like Planets,” Earth and Planetary Science Letters, vol. 208, pp. 113-124, 2003.
Spitzer, Jr., Lyman, “The Beginnings and Future of Space Astronomy,” American Scientist, pp. 473-484, 1962.
Pritchett Joshua L
The Regents of the University of Colorado, a body corporate
Towsend and Townsend and Crew LLP
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