Imaging optical system including optical element having...

Details Imaging optical system including optical element having... Imaging optical system including optical element having...

2005-09-01

2009-02-17

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Single component with multiple elements

C359S741000, C359S742000, C359S743000, C359S718000, C359S719000

Reexamination Certificate

active

07492534

ABSTRACT:
An imaging optical system capable of moving a meridian image plane further closer to an ideal imaging plane vertical to an optical axis with the number of lenses kept constant. At least one plane of at least one optical element and including at least one optical element is divided into at least one zonal area surrounding an optical axis and a center area including the optical axis. When the first area of a meridian image plane, on which a meridian ray of light passing through one of the at least one zonal area and the center area images, displaces to an image side from the reference image plane of the imaging optical system and the second area of a meridian image plane, on which a meridian ray of light passing through the other of the at least one zonal area and the center area images, displaces to an object side from the reference image plane of the imaging optical system, the boundary between the at least one zonal area and the center area is made discontinuous so that the first and second areas approach the reference image plane.

REFERENCES:
patent: 6934094 (2005-08-01), Kojima et al.
patent: 5-014602 (1993-01-01), None
patent: 11-249007 (1999-09-01), None
patent: 2000-171705 (2000-06-01), None
patent: 2002-055273 (2002-02-01), None
International Search Report for International Appln No. PCT/IB2005/016040 dated Nov. 8, 2005.

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