Polar-axis telescope and equatorial telescope mount...

Details Polar-axis telescope and equatorial telescope mount... Polar-axis telescope and equatorial telescope mount...

2006-03-28

2006-03-28

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Compound lens system

Telescope

C359S422000

Reexamination Certificate

active

07019896

ABSTRACT:
The polar-axis telescope has an objective lens, a focal plate, an eyepiece, a zoom optical system, and a zoom optical system driver. The objective lens forms an object image, and the focal plate is arranged on a focal plane of the objective lens. The eyepiece is arranged backward of the focal plate and forms an observed image. The zoom optical system is arranged between the objective lens and the eyepiece. The zoom optical system makes the observed image appear gradually bigger while maintaining an in-focus situation. The zoom optical system driver shifts the zoom optical system along a polar-axis, corresponding to an optical axis of the polar-axis telescope, so as to change a magnification.

REFERENCES:
patent: 4842395 (1989-06-01), Sato et al.
patent: 5956177 (1999-09-01), Nishikata et al.
patent: 6778330 (2004-08-01), Abe
patent: 36-8859 (1961-04-01), None
patent: 9-281408 (1997-10-01), None

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