Image-inverting prism device with double uses for a telescope

Details Image-inverting prism device with double uses for a telescope Image-inverting prism device with double uses for a telescope

2007-08-21

2007-08-21

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Compound lens system

Telescope

C399S404000, C399S016000

Reexamination Certificate

active

11081902

ABSTRACT:
An image-inverting prism device with double use for a telescope includes a prism contained in a housing formed of two semi-housings. The housing has a first end for connecting a lens, the first end being provided with three different diameter threaded stepped surfaces. The housing has a second end provided with a male threaded surface. The prism device further has a small lens tube, a changeover tube, a large lens tube, so when the image-inverting prism device is to be combined with a telescope with a large lens or a small lens, the changeover tube is used for connecting a large cylinder or a small cylinder of a telescope, and a large lens or a small lens respectively engaging with different diameter threaded stepped surfaces so that the image-inverting prism device may be use with both a telescope of a large lens and a small lens.

REFERENCES:
patent: 5682264 (1997-10-01), Cleveland et al.
patent: 5898519 (1999-04-01), Palmer
patent: 5959770 (1999-09-01), Perkins et al.
patent: 6020996 (2000-02-01), Perkins et al.

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