Color separation optical system and image pickup apparatus

Details Color separation optical system and image pickup apparatus Color separation optical system and image pickup apparatus

2008-09-11

2011-10-18

Pinkney, Dawayne (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S831000, C348S338000

Reexamination Certificate

active

08040611

ABSTRACT:
It is disclosed that a color separation optical system improves color reproducibility by obtaining a characteristic which approximates an ideal spectral characteristic in view of influence of polarization separation caused according to the magnitude of an incidence angle. In the color separation optical system, a curve representing a characteristic of a green-reflecting dichroic film DG has a shape along the characteristic curve representing an ideal spectral characteristic corresponding to green light. Further, the characteristic of the blue-reflecting dichroic film DB is associated with that of the green-reflecting dichroic film DG. A part, in which the transmittance of the blue-reflecting dichroic film DB changes from a low transmittance to a high transmittance, in the transmittance characteristic curve representing the characteristic of the blue-reflecting dichroic film DB is included in a predetermined wavelength region associated with the characteristic of the green-reflecting dichroic film DG.

REFERENCES:
patent: 2945413 (1960-07-01), Kelly
patent: 3602637 (1971-08-01), Katsuta et al.
patent: 3802763 (1974-04-01), Cook et al.
patent: 3905684 (1975-09-01), Cook et al.
patent: 3932027 (1976-01-01), Cook et al.
patent: 4084179 (1978-04-01), Sekiguchi
patent: 4589015 (1986-05-01), Nakata et al.
patent: 6078429 (2000-06-01), Lyon
patent: 6404552 (2002-06-01), Manabe
patent: 6698893 (2004-03-01), Takimoto et al.
patent: 7165846 (2007-01-01), Sannohe
patent: 7411734 (2008-08-01), Magarill et al.
patent: 7518803 (2009-04-01), Sawai et al.
patent: 7575325 (2009-08-01), Suzuki et al.
patent: 2006/0279846 (2006-12-01), Ring et al.
patent: 2009/0086324 (2009-04-01), Saita et al.
patent: 1251482 (1971-10-01), None
patent: 2005-208256 (2005-08-01), None
patent: WO 02/102087 (2002-12-01), None
Extended European Search Report in European Application No. 08015956.9 mailed Apr. 5, 2011.
U.S. Office Action issued Mar. 11, 2010, in co-pending application U.S. Appl. No. 12/049,902.

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