Eyepiece modification for astronomical telescopes

Details Eyepiece modification for astronomical telescopes Eyepiece modification for astronomical telescopes

1996-06-21

1997-12-09

Ben, Loha

Optical: systems and elements

Lens

With support

359819, 359433, G02B 702

Patent

active

056966350

ABSTRACT:
The eyepiece of a telescope is provided with a plano-convex eye lens that adjustably pivots about the geometric center of its convex surface, inducing prism while maintaining the optical axis and focal plane of the eyepiece. The prism effect is adjusted to offset atmospheric optical dispersion when viewing celestial bodies near the horizon. Simple and inexpensive mechanical means for tilt adjustment are disclosed.

REFERENCES:
patent: 4088396 (1978-05-01), Edelstein
patent: 4672458 (1987-06-01), McKechnie
patent: 4961627 (1990-10-01), Swain et al.
patent: 5228051 (1993-07-01), Matthews
patent: 5490128 (1996-02-01), Ogata
Off Axis Parabloids, Kastner 1994.
Auggie 80.degree. Widefield Eyepieces, Kastner 1995.

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