1
Walters Glenn A: Precision angle measuring device. January 2, 1973: US3708231 (69 worldwide citation)

A device for the precision measuring of angular movements. The device incorporates an optical lever utilizing a predetermined number of reflections to increase the displacement of a light beam to be read out by discrete sensors. Ambiguities resulting from the amplification of displacement are resolv ...


2
YuZhong Dai: Device for measuring an angle between pivotally-connected members. Brown & Sharpe Manufacturing Company, Wolf Greenfield & Sacks P C, April 1, 1997: US05616917 (3 worldwide citation)

A device for measuring an angle between pivotally connected, intersecting sides of a parallelogram includes a grating having a pattern of parallel, straight grating lines formed on a substrate, and a read head. The grating is mounted in a fixed position with respect to a first side of the parallelog ...


3
Blair A Frost: Angle setting device. May 28, 1991: US05018277 (2 worldwide citation)

A device is disclosed where, for various purposes, a substantial range of the angular relationship between two flat surfaces must be quickly, easily and accurately established and maintained. The device has three component corresponding ends of which are interconnected by a common pivot with each of ...


4
Dai Yuzhong: Precision angle measuring device. Brown & Sharpe Manufacturing Company, McCLELLAN William R, November 21, 1996: WO/1996/036849

A device (72) for measuring an angle between pivotally connected, intersecting sides,(40, 50) of a parallelogram (62) includes a grating (78) having a pattern (84) of parallel, straight grating lines (86) formed on a substrate (88) and a read head (80). The grating is mounted in a fixed position wit ...


5
Takagi Tomohito: Angle measuring device for minute plane. National Institute Of Advanced Industrial &Amp Technology, March 29, 2007: JP2007-078594

PROBLEM TO BE SOLVED: To provide a high precision angle measuring device for planes of several tens of micrometer (corresponding to a domain of micro Vickers test) by measuring angles of minute plane of samples using optical system installing two beam splitters in the middle of an ocular lens and an ...