Optical system and assembling method of optical system

Details Optical system and assembling method of optical system Optical system and assembling method of optical system

1998-09-14

1999-11-02

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359676, 359822, 359557, 396 55, 356359, G02B 1514, G02B 702, G02B 2764, G01B 1100

Patent

active

059781513

ABSTRACT:
An optical system has a plurality of lens elements and a lens block including a single lens or multiple lenses included in the plurality of lens elements, wherein an extent of curvature of field asymmetricity in two or more directions is detected by an off-axial rays that have passed through a lens block constituting one or more lens elements in the optical system and wherein a position of the lens block is adjusted such that the curvature of field asymmetricity is reduced to a minimum, wherein the lens block fulfills the predetermined conditions.

REFERENCES:
patent: 4747677 (1988-05-01), Horikawa et al.
patent: 5453606 (1995-09-01), Hojo
patent: 5698841 (1997-12-01), Momoki
Ray, Sidney F., "Applied Photographic Optics," Focal Press: Linacre House, Jordan Hill, Oxford, England, chapter 11(pp. 77-92), 1994.

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