Method and apparatus for the determination of the position...

Details Method and apparatus for the determination of the position... Method and apparatus for the determination of the position...

G - Physics

08

C

340/136, 33/32,

G08C 21/00 (2006.01)

Patent

CA 1182187

ABSTRACT OF DISCLOSURE Method for the determination of 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 photo- electric receiver, comprises providing a Laser as the radiant source, aiming said Laser at an angle of inclina- tion 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, which surface extends approximately perpendi- cularly of the optical axis and is subject to positional variations along the said optical axis, and conducting the beam from the irradiated point to the photoelectric receiver through a narrow-band optical filter of which the band pass width includes the Laser wavelength.

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