Optical rangefinder
AssigneeLeica Geosystems AG
InventorsBernhard Gachter, Urs Vokinger
Life of this patent
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Abstract
In order to improve target illumination a light emitter comprises several partial light sources (3a, 3b, 3c, 3d), the partial beams (5a, 5b, 5c, 5d) of which are collected by means of a beam collector optic (2) and directed to the aperture of a collimator (1). The beam collector optic (2) comprises two half-mirrored sheets (12a, 12b), which each direct two similarly polarised partial beams (5a, b; 5c, d) side by side onto a polarisation cube (13), where the pairs of partial beams which are polarised perpendicular and orthogonal to each other are overlaid.
Claims13
Optical rangefinder having an emitter which comprises a collimator (1) and a light source arranged before said collimator, and having a receiver and a control and evaluation unit, characterized in that the light source comprises a plurality of partial light sources (3a, 3b, 3c, 3d) having in each case a laser diode, all laser diodes emitting at the same wavelength, and has a beam-collecting optical system (2) which is arranged after said partial light sources and collects the partial beams (5a, 5b, 5c, 5d) emitted by the partial light sources (3a, 3b, 3c, 3d) and directs them into the aperture of the collimator (1).
Optical rangefinder according to claim 6 [sic], characterized in that a separate collecting optical system (4a;
- 4b;
- 4c;
- 4d) is arranged immediately after each partial light source (3a, 3b, 3c, 3d).
Dependencies are inferred from the claim text.