Imaging optical system

Details Imaging optical system Imaging optical system

2007-03-06

2007-03-06

Perkey, W. B. (Department: 2851)

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Shutter

C396S506000, C348S340000, C348S342000, C348S362000

Reexamination Certificate

active

10444982

ABSTRACT:
An imaging optical system includes an image forming optical system forming an image of an object, an imaging device placed in the proximity of the image of the object, a liquid crystal element placed at a preset position on the optical path between the object and the imaging device; and an optical element placed on the object side of the liquid crystal element. The optical element is constructed of a medium in which the transmittance of light at a wavelength of 500 nm is 20% or more and which exhibits different refractive indices with respect to light, the directions of vibrations of which are perpendicular to each other.

REFERENCES:
patent: 3890628 (1975-06-01), Gurtler
patent: 4190343 (1980-02-01), Wagensonner
patent: 5619266 (1997-04-01), Tomita et al.
patent: 06-046324 (1994-02-01), None

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