Image magnification apparatus

Details Image magnification apparatus Image magnification apparatus

1997-02-21

1998-09-01

Epps, Georgia Y.

Optical: systems and elements

Lens

Selective magnification by exchanging or adding a lens...

359649, 359650, 359651, 359672, 359673, 359791, G02B 300, G02B 1502, G02B 912

Patent

active

058018867

ABSTRACT:
An image magnification apparatus, for use in a video display system that displays an image of an object, comprising a connecting module for connecting the image magnifying apparatus to a lens module of the video display system, and an objective lens system for forming an optical image of the object. The apparatus also includes a conversion optical system for magnifying the optical image formed by the objective lens system. The conversion optical system further includes a first biconvex lens unit having a positive refractive power, a second biconvex lens unit having a positive refractive power, and a third biconcave lens unit having a negative refractive power.

REFERENCES:
patent: 4154508 (1979-05-01), Nakamura
patent: 4206971 (1980-06-01), Hamanashi et al.
patent: 4239340 (1980-12-01), Ogino
patent: 4253736 (1981-03-01), Momiyama
patent: 5253112 (1993-10-01), Suzuki et al.

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