Optical system, and electronic equipment that incorporates...

Details Optical system, and electronic equipment that incorporates... Optical system, and electronic equipment that incorporates...

2006-10-03

2006-10-03

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

Reexamination Certificate

active

07114818

ABSTRACT:
The invention relates to a compact, slimmed-down, low-cost optical system and electronic equipment that incorporates the same. The optical system at least comprises a stop2,at least one object-side reflecting surface12located on the object side with respect to the stop2and inclined from the optical axis of the optical system, at least one image-side reflecting surface22, 23located on the image side of the optical system with respect to the stop2and inclined from the optical axis, and an image pickup device3.Regarding all reflecting surfaces inclined from the optical axis in the optical system, the reference plane for each reflecting surface is given by a plane defined by an entrance-side axial chief ray and a reflection-side axial chief ray regarding each reflecting surface. In the invention, the reference plane for at least one object-side reflecting surface12and the reference plane for at least one image-side reflecting surface22, 23cross at any angle, and at least one object-side reflecting surface12and at least one image-side reflecting surface22, 23have a rotationally asymmetric aspheric shape.

REFERENCES:
patent: 6268963 (2001-07-01), Akiyama
patent: 6335837 (2002-01-01), Aratani et al.
patent: 6388827 (2002-05-01), Nagata et al.
patent: 6671099 (2003-12-01), Nagata
patent: 2002/0097497 (2002-07-01), Kamo
patent: 2002/0105734 (2002-08-01), Kimura et al.

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