Image-forming optical system

Details Image-forming optical system Image-forming optical system

2006-04-11

2006-04-11

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

Reexamination Certificate

active

07027234

ABSTRACT:
The present invention is directed to an image-forming optical system. The image-forming optical system according to the present invention contains, in order from an object side: an iris diaphragm; a first lens having a positive refractive power and at least one aspheric surface; and a second lens having a negative refractive power and at least one aspheric surface. In accordance with the present invention, there is provided an image-forming optical system for cameras using an image pickup device that has a small number of lenses to easily realize the compactness and satisfies a requirement for a high optical performance.

REFERENCES:
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patent: 6833968 (2004-12-01), Do
patent: 2003/0081330 (2003-05-01), Do et al.
patent: 2004/0036983 (2004-02-01), Ninomiya et al.
patent: 2002-296496 (2001-03-01), None
patent: 2002-372666 (2001-06-01), None
patent: 2003-075719 (2001-09-01), None

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