Compact telescope

Details Compact telescope Compact telescope

1996-08-28

1998-03-17

Henry, Jon W.

Optical: systems and elements

Compound lens system

Telescope

359407, 359399, G02B 2300, G02B 2318

Patent

active

057293848

ABSTRACT:
A telescope has an objective lens system, an eyepiece optical system, and a third lens system between the objective lens system and the eyepiece optical system. The objective lens system is provided with a circular shape lens whose upper and lower portions are cut off. The eyepiece optical system is also provided with a circular shape lens whose upper and lower portions are cut off. The third lens system is provided with a circular shape lens which is disposed in a position where a light beam formed by the objective lens system has a smaller cross-sectional area.

REFERENCES:
patent: 3062098 (1962-11-01), Dowling et al.
patent: 3076382 (1963-02-01), Dowling et al.
patent: 3244072 (1966-04-01), Dowling et al.
patent: 4013341 (1977-03-01), Riley
patent: 4986644 (1991-01-01), Yang
Catalogue of Minolta's flat binoculars with translation; Mar. 1, 1995.

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