Monocular telescope having a focusing unit whose mechanical sens

Details Monocular telescope having a focusing unit whose mechanical sens Monocular telescope having a focusing unit whose mechanical sens

1993-09-15

1995-09-26

McGraw, Vincent P.

Optical: systems and elements

Compound lens system

Telescope

359405, 359410, G02B 2700, G02B 2308

Patent

active

054538750

ABSTRACT:
A monocular telescope having a constant length includes a lens mounted in a tube and interchangeable eyepieces to vary the magnification. Focusing is performed using a positioning member to move a focusing unit axially in the tube. The rate of focus adjustment is adaptable to the selected magnification due to the provision of a transmission gear having different diameter gear wheels arranged along the positioning member. The transmission gear can be operatively coupled to the interchangeable eyepiece.

REFERENCES:
patent: 1088494 (1914-02-01), Warner
patent: 3028792 (1962-04-01), Krajowsky et al.
patent: 4249793 (1981-02-01), Uehara
patent: 4600277 (1986-07-01), Murray, Jr.
Nefodov et al., "Telescope with two magnifications", Sov. J. Opt. Technol. vol. 43, #6, Jun. 1976 pp. 360-361.
Optolyth-Femrohre und Spektive (Jul. 1993).

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