Telescope

Details Telescope Telescope

1991-07-29

1994-05-10

Arnold, Bruce Y.

Optical: systems and elements

Compound lens system

Telescope

359399, 359407, 359425, 2502012, 2502018, G02B 2300, G01J 120

Patent

active

053113543

ABSTRACT:
In a telescope according to the present invention, defocus amount of an optical system constituting the telescope is calculated; whether or not the defocus amount is within a predetermined in-focus range obtained from a focal point adjusting ability of human eye is discriminated; and when the defocus amount exceeds the in-focus range as a result of the above discrimination, the optical system is driven. The optical system is driven in a shorter time than a time required for removing a defocus by human eye.

REFERENCES:
patent: 4262988 (1981-04-01), Ishibai et al.
patent: 4284325 (1981-08-01), Ishibai et al.
patent: 4470683 (1984-09-01), Nakajima
patent: 4557577 (1985-12-01), Shinoda
patent: 4650297 (1987-03-01), Ishibai
patent: 4816856 (1989-03-01), Hamada et al.
patent: 4870439 (1989-09-01), Tsuboi et al.
patent: 4967224 (1990-10-01), Hamada et al.
patent: 4998124 (1991-03-01), Ishida et al.
patent: 5005040 (1991-04-01), Norita et al.
patent: 5053800 (1991-10-01), Ishida et al.

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