Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent
1996-03-21
1998-06-02
Font, Frank G.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
359623, 359626, G02B 2710
Patent
active
057609632
ABSTRACT:
A fly-eye lens in accordance with the present invention comprises a plurality of lens elements which are arranged in two-dimensionally close contact with each other so as to connect light-entering and light-exit surfaces of the lens elements to each other, while at least three refractive surfaces with a predetermined refractive power are disposed between the light-entering and light-exit surfaces in each of the lens elements. Here, each of the plurality of lens elements has an identical focal length f and, concering a bundle of rays which enters each of the lens elements in parallel to its optical axis with a maximum incident height h.sub.max and then is emitted therefrom with an exit angle .theta..sub.max, substantially satisfies a conditional expression:
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Font Frank G.
Lester Evelyn A.
Nikon Corporation
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