Re-imaging optical system

Details Re-imaging optical system Re-imaging optical system

1995-02-17

1996-08-13

Epps, Georgia Y.

Optical: systems and elements

Lens

Eyepiece

359645, 359646, 359659, 359744, G02B 2500, G02B 2102, G02B 308

Patent

active

055462286

ABSTRACT:
A re-imaging objective optical system provides superior optical performance while having a short overall length and a relatively simple composition. The system has, in order from the object side of the optical system, a front lens group (G1) composed of a first lens group having a positive lens component (L1), a second lens group having a biconcave negative lens component (L2) and a third lens group having a positive lens component (L3); and a back lens group G2 composed of a cemented double lens element with components (L4 and L5) and a positive lens component (L6). The spatial or primary image I.sub.1 from the objective optical system is formed on the optical path between the first lens group and the second lens group.

REFERENCES:
patent: 3671099 (1972-07-01), Shoemaker et al.
patent: 4027951 (1977-06-01), Mori et al.
patent: 4479695 (1984-10-01), Neil
patent: 4501474 (1985-02-01), Kimura

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