Binocular telescope with internal focusing

Details Binocular telescope with internal focusing Binocular telescope with internal focusing

1980-05-20

1982-05-11

Henry, Jon W.

350 47, 350 77, G02B 706, G02B 712, G02B 2300

Patent

active

043290132

ABSTRACT:
Disclosed is a binocular telescope with internal focusing, comprising two telescope tubes, each having an ocular end and an objective end; a double joint bridge connecting the two telescope tubes; a central focusing element rotatably connected to the bridge; an internal focusing mechanism located in at least a first of the telescope tubes and including a first focusing lens axially movable within the first tube; a mechanism for transforming rotational movement of the central focusing element into axial adjustment of the focusing lens; and a mechanism including an annular bushing rotatably mounted near the objective end of the first telescope tube for independently varying the axial position of the first focusing lens, in order to make diopter focusing adjustments.

REFERENCES:
patent: 1324448 (1919-12-01), Greiner
patent: 2811895 (1957-11-01), Hensen
patent: 4030808 (1977-06-01), Hornschu et al.
patent: 4080042 (1978-03-01), Hornschu et al.
patent: 4087153 (1978-05-01), Hengst

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