Varifocal imaging optical system having moire eliminating functi

Details Varifocal imaging optical system having moire eliminating functi Varifocal imaging optical system having moire eliminating functi

1990-04-30

1991-04-16

Henry, Jon W.

350427, G02B 1514

Patent

active

050077198

ABSTRACT:
An imaging optical system suitable for imaging an object having a large spectral component at a certain spatial frequency. The imaging optical system includes an imaging lens system for forming an image of an object on a given image plane. The imaging lens system can have different magnifications without changing the positional relationship between the object and the image plane and includes a varifocal lens portion and a front lens portion arranged on the object side of the varifocal lens portion. The imaging lens system satisfies the following condition:

REFERENCES:
patent: 4408841 (1983-10-01), Arai et al.
patent: 4701033 (1987-10-01), Masumoto
patent: 4756609 (1988-07-01), Estelle
patent: 4832465 (1989-05-01), Arai et al.

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