04453083 is referenced by 16 patents and cites 3 patents.

Apparatus is disclosed for determining the position of a surface in which radiation from an optical radiant source is applied to the surface and, by means of a lens system, an image of the radiation is produced on a photoelectric receiver. A laser serves as the radiant source, and is aimed at an angle of inclination relative to an optical axis of the lens system at a point of a surface which, by virtue of its temperature, emits visible radiation in the same wavelength range as the Laser. The surface extends approximately perpendicularly of the optical axis and is subject to positional variations along the said optical axis. The beam is directed from the irradiated point to the photoelectric receiver through a narrow-band optical filter of which the pass band includes the laser wavelength.

Title
Apparatus for the determination of the position of a surface
Application Number
6/315039
Publication Number
4453083
Application Date
October 26, 1981
Publication Date
June 5, 1984
Inventor
Heinz Peter Hippler
Dortmund-Dorstfeld
DE
Peter Bohlander
Dusseldorf
DE
Agent
Holman & Stern
Assignee
Betriebsforschungsinstitut VDEh Institut fur angewandte Forschung
DE
IPC
G01C 3/08
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