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Laser module comprising micro-lens array

A micro-lens array, micro-lens technology, used in lasers, laser parts, semiconductor lasers, etc.

Active Publication Date: 2017-08-15
HEXAGON TECH CENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such non-uniformly generated arrays are a general problem, they become particularly pronounced when designing measurement equipment with such components

Method used

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  • Laser module comprising micro-lens array
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  • Laser module comprising micro-lens array

Examples

Experimental program
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Embodiment Construction

[0070] figure 2 A lighting unit 10 according to the invention is shown. The light emitting unit 10 includes a light source 11 and a microlens array 14 . The light source 11 can here be designed as a light emitting diode (LED), a laser diode or a broad bar laser (BAL) (for example with a collimating lens) or any other kind of suitable light source.

[0071] Broad stripe lasers (BALs) (also known as "broad stripe", "slab" or "broad emitter" laser diodes) have a much wider gain along one lateral direction (x-direction) volume. BALs emit very high optical power (approximately 1-10W) compared to single-mode laser diodes which have a smaller gain region in both directions. BALs can be used in pulsed mode with pulses typically below 100 ns, but in some cases also with longer pulses or even in continuous mode.

[0072] In the wide direction, many spatial modes and longitudinal modes can coexist. In the narrow direction, preferably only one spatial ground mode propagates, and the...

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Abstract

The invention discloses a laser module comprisinga micro-lens array. Light emitting unit, in particular of or for a triangulation-based distance measuring device, for providing defined measuring light, in particular laser light, is disclosed. The light emitting unit comprising a light source for emitting light, in particular a laser light source for emitting laser light, and a beam forming assembly for shaping the light by affecting propagation of the light emitted by the light source, wherein the beam forming assembly is arranged and designed so that measuring light is provided in form of a light line having a midpoint and two opposite ends. The beam forming assembly comprises at least one micro-lens array, the at least one micro-lens array comprises a plurality of micro-lenses, wherein the micro-lenses are designed and arranged in joint manner next to each other with algebraic signs for curvatures of successive micro-lenses being opposite and so that a periodic structure is provided.

Description

technical field [0001] The present invention generally pertains to apparatus for providing defined light rays, preferably for triangulation-based measurements of object surfaces using improved light emission methods. Background technique [0002] It is common practice to inspect workpieces after production on a coordinate positioning device such as a coordinate measuring machine (CMM) in order to check the correctness of predetermined object parameters, such as the size and shape of the object. Furthermore, the detection of surfaces of unknown objects is of interest in many industrial applications. Such measurements may also typically be provided using a coordinate measuring machine or any other suitable type of scanning device. [0003] In a conventional 3D coordinate measuring machine, the support probe (probe head) moves along three mutually perpendicular axes (along directions X, Y, Z). In this way, the probe can be guided to any point in the measuring volume of the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/18G01B11/25G02B27/09G02B3/00G02B27/30H01S5/00
CPCG01B11/2518G01C3/18G02B3/005G02B27/0961G02B27/0966G02B27/30H01S5/0071G02B27/0927
Inventor J·斯蒂格瓦尔彼得·基佩弗托马斯·延森
Owner HEXAGON TECH CENT GMBH