Narrow bandpass filter assemblies for solar telescopes

Details Narrow bandpass filter assemblies for solar telescopes Narrow bandpass filter assemblies for solar telescopes

2008-07-08

2008-07-08

Allen, Stephone B. (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C359S589000, C359S260000, C359S261000

Reexamination Certificate

active

07397604

ABSTRACT:
The invention relates to the combination of lower transmittance etalons with higher transmittance filters, including use of a single circular polarizer with high efficiency and optical performance for its filtered polarization, to achieve necessary throughput of a narrow bandpass region. The lower transmittance etalons can be achieved by using lower transmittance solid-state etalon materials, or by control of the coatings on the etalon. Alternate configurations are described that reduce the optical assembly's footprint, and/or include additional filters to remove stray light. An innovative option to heat the etalon directly is disclosed to actively stabilize and maintain the etalon's bandpass.

REFERENCES:
patent: 3938877 (1976-02-01), Strumia et al.
patent: 4092070 (1978-05-01), Smithline et al.
patent: 4204771 (1980-05-01), Shull et al.
patent: 4731881 (1988-03-01), Geller
patent: 5125743 (1992-06-01), Rust et al.
patent: 5287214 (1994-02-01), Robertson et al.
patent: 5291332 (1994-03-01), Siebert et al.
patent: 5574286 (1996-11-01), Huston et al.
patent: 5710655 (1998-01-01), Rumbaugh et al.
patent: 5781268 (1998-07-01), Liu et al.
patent: 5801831 (1998-09-01), Sargoytchev
patent: 5882774 (1999-03-01), Jonza et al.
patent: 6075597 (2000-06-01), Olshausen
patent: 6181726 (2001-01-01), Lunt
patent: 6215802 (2001-04-01), Lunt
patent: 6269202 (2001-07-01), Lee et al.
patent: 6452646 (2002-09-01), Sharp et al.
patent: 6452725 (2002-09-01), Sterling et al.
patent: 6459533 (2002-10-01), Clapp et al.
patent: 6543153 (2003-04-01), Weber et al.
patent: 6610356 (2003-08-01), Kausch et al.
patent: 6635337 (2003-10-01), Jonza et al.
patent: 6700706 (2004-03-01), Chang et al.
patent: 2005/0078906 (2005-04-01), Lunt et al.
patent: 2005/0207014 (2005-09-01), Sidorin et al.
Rainer Beck, Solar Astronomy Handbook, 1995 (First published in German, 1982), pp. 57-61; pp. 318-320, Willmann-Bell, Inc., Richmond, VA.
J. A. Dobrowolski, Coatings and Filters, chapter in Handbook of Optics, Walter Driscoll, editor, 1978, p. 8-81; pp. 8-84 to 8-85,McGraw-Hill Book Company, New York, NY.
Donald G. Carson, L. Dean Canfield, and Marshall L. Ogne, Final Report: An Evaluation of Interference Fitlers for Hydrogen-alpha Telescopes for the Apollo Telescope Mount, LMSC-680238, Nov. 1967, pp. 66-70, 73-76, Lockheed Missiles & Space Company.
Edwin Hirsch, Photographing the Sun in H-Alpha, Astronomy magazine, Jan. 1978, pp. 37-39, AstroMedia Corp.

Affiliated with

Also associated with

Rating

Narrow bandpass filter assemblies for solar telescopes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Narrow bandpass filter assemblies for solar telescopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Narrow bandpass filter assemblies for solar telescopes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2798571