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US 6,307,636 B1Granted
Method for telemeasuring and telemeter
AssigneeLeica Microsystems Inc.
InventorRoger Spink
Life of this patent
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AssigneeLeica Microsystems Inc.
InventorRoger Spink
Estimating the term…
The invention relates to enhanced telemeasuring involving the use of laser beams which are initially directed onto a lens (18) in a parallel beam path and which are bundled by the lens (18) into focus. If the object plane is not located in focal point (A), two laser illuminated points (P) can be seen on the object plane. If these laser illuminated points are additionally coded, e.g. in the form of a horizontal or vertical line by corresponding additional lenses or masks in front of the lens (18), images of markings can be obtained. A time coding could also be included so that, for example, one time-delayed laser illuminates after another. The distance between both laser illuminated points serves a measure for the distance of the main lens (18) from the object plane, whereby this measure is computationally dependent upon the focal range of the lens (18) and the stereoscopic basis of both illumination sources in front of the lens (18).
Method for measuring a distance (Z) between an object (6) and a principal plane of a main objective (18) with the aid of an optical beam, characterized in that at least two component beams (2a, b), which can be distinguished from one another by coding, of the beam are directed in the parallel beam path upstream of the main objective (18) to pass through the latter onto the object (6), the component beams (2a, b) producing on the surface of the object (6) luminous points (20a, b;
Dependencies are inferred from the claim text.