Optical: systems and elements – Prism – With reflecting surface
Patent
1989-12-08
1991-10-01
Brown, Brian W.
Optical: systems and elements
Prism
With reflecting surface
354286, 354295, 359819, 359830, G03B 2900
Patent
active
050537946
ABSTRACT:
Presented is a universal adapter ring for use in interconnecting a camera of the single lens reflex type to an optical device in a manner that maintains the alignment of the optical axes of the camera and optical device and secures the two together. Sets of coaxially arranged threads are formed on the spaced faces of the ring, and a resiliently deformable spring-steel band is coaxially arranged within the ring in association with adjustable screws that may be digitally manipulated to deform the spring-steel band into tight engagement with the cylindrical eyepiece of an optical device. A centrally apertured protective shield plate is also provided extending diametrically across the adapter ring to form an abutment against which the optical device may abut surrounding the aperture to prevent the optical device from impinging on the lens of the camera, or dropping into the camera when the lens is removed and for preventing stray light from entering the camera.
REFERENCES:
patent: 2765718 (1956-10-01), Beecher
patent: 3924786 (1975-12-01), Duquette
patent: 4723864 (1988-02-01), Umeda
patent: 4893143 (1990-01-01), Sheng-Huei
Blankenship Howard B.
Brown Brian W.
Leavitt John J.
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