Optical: systems and elements – Lens – With field curvature shaping
Reexamination Certificate
2008-05-06
2008-05-06
Thompson, Timothy J. (Department: 2873)
Optical: systems and elements
Lens
With field curvature shaping
C359S641000, C359S242000
Reexamination Certificate
active
07369320
ABSTRACT:
A projection system having a prescribed relationship between the condenser and the projection lens is disclosed, where an imager gate normally coinciding with a projection object plane is between and spaced away from a condenser back focal plane and a condenser image plane. The condenser images an extended source onto the condenser image plane. A pixilated panel or film defining a graphic image is located at the imager gate. The magnification of the condenser is chosen so the image of the source is essentially the same size as the pixilated panel. Positioning the imager gate away from the condenser image plane provides blurring of any brightness non-uniformities across the area of the source, providing a relatively uniform illumination pattern whose outer shape matches the shape of the imager gate.
REFERENCES:
patent: 4519694 (1985-05-01), Kashiwagi et al.
patent: 5084807 (1992-01-01), McKechnie et al.
patent: 5355187 (1994-10-01), Ogino et al.
patent: 5438379 (1995-08-01), Kurematsu
patent: 5537171 (1996-07-01), Ogino et al.
patent: 5868481 (1999-02-01), Conner et al.
patent: 5882774 (1999-03-01), Jonza et al.
patent: 5940152 (1999-08-01), Wilson et al.
patent: 6038064 (2000-03-01), Kanao et al.
patent: 6335838 (2002-01-01), Kasai et al.
patent: RE37578 (2002-03-01), Gleckman
patent: 6592224 (2003-07-01), Ito et al.
patent: 6595648 (2003-07-01), Woodgate et al.
patent: 6639733 (2003-10-01), Minano et al.
patent: 6816234 (2004-11-01), Tsuji
patent: 6868223 (2005-03-01), Shinoda
patent: 6916440 (2005-07-01), Jackson et al.
patent: 6936209 (2005-08-01), Jackson et al.
patent: 6939499 (2005-09-01), Merrill et al.
patent: 6949212 (2005-09-01), Merrill et al.
patent: 6961115 (2005-11-01), Hamatani et al.
patent: 7046338 (2006-05-01), McGuire
patent: 2004/0080938 (2004-04-01), Holman et al.
patent: 2005/0036119 (2005-02-01), Ruda et al.
Born, Max and Emil Wolf,Principles of Optics; Electromagnetic Theory of Propagation, Interference and Diffraction of Light,Table of Contents, pp. 522-526, Sixth Edition, Pergamon Press, Oxford, 1980.
Sterrenburg, Frithjof A.S., Microscopy Primer, Chapter 7, http://www.microscopy-uk.org.uk/index.html?http://www/microscopy-uk.org.uk/primer/illumin.htm.
Abbe Illumination Definition, The Photonics Directory, www.photonics.com.
Bruzzone et al., “High-Performance LCoS Optical Engine Using Catesian Polarizer Technology”, SID Symposium Digest vol. 34, pp. 126-129, Issue 1, May 2003.
Keuper et al., “RGB LED Illuminator for Pocket-Sized Projectors”, SID Symposium Digest of Technical Papers, pp. 943-945, vol. 35, Issue 1, May 2004.
Kingslake, Rudolf, “Applied Optics and Optical Engineering”, Table of Contents, pp. 223-226, vol. 2, Academic Press, New York, 1965.
Koehler Illumination Definition, The Photonics Directory, www.photonics.com.
Light Prescriptions Innovators, “Technology Review”, www.lpi-llc.com.
Spindler & Hoyer, “Generating Parallel Beams”, p. 25, Precision Optics, 1990.
U.S. Application entitled “Method for Making Polarizing Beam Splitters”, filed on Jul. 29, 2005, Having U.S. Appl. No. 11/192,681.
U.S. Application entitled “LED with Compound Encapsulant Lens”, filed on Dec. 30, 2005, having U.S. Appl. No. 11/322,801.
U.S. Application entitled “Fresnel Lens Combination”, filed on Dec. 30, 2005, having U.S. Appl. No. 11/322,981.
U.S. Application entitled “Polarizing Beam Splitter”, filed on Jul. 29, 2005, having U.S. Appl. No. 11/192,655.
3M Innovative Properties Company
Thompson Timothy J.
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