Published March 26, 1985 | Version v1
Patent Metadata-only

Non-contact X Y digitizer using two dynamic ram imagers

Creators

Description

Apparatus is disclosed for detecting the position of an object within a viewing field, such as a CRT display screen. The apparatus includes point sources of radiation arranged at spaced locations around the edge of the viewing field and a retro-reflective surface disposed around the perimeter of the viewing field. The retro-reflective surface reflects radiation received from its originating source back toward this source. A radiation receiver is arranged adjacent to each to receive the radiation reflected back from the retro-reflective surface and to determine the angular position of an object within the viewing field which interrupts the path of radiation

Availability note (English)

U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.

Additional details

Publishing Information

Imprint Pagination
v p.
IPC:
Int. Cl. G01S 5/16; G01S 7/50.
IPC
Int. Cl. G01S 5/16; G01S 7/50.
Patent number
US patent document 4,507,557/A/

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
17009835
Subject category
S42: ENGINEERING;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
CATHODE RAY TUBES; DISPLAY DEVICES; LIGHT SOURCES; REFLECTION
Descriptors DEC
COMPUTER-GRAPHICS DEVICES; ELECTRON TUBES; RADIATION SOURCES

Optional Information

Notes
PAT-APPL-468104.