Photon detector with an immobilisable photon-sensitive element, in particular spad, and distancing measuring device comprising said type of photon detector

A technology of photon detectors and sensitive components, applied in the field of photon detectors, can solve problems such as inability to provide measurement results

Inactive Publication Date: 2012-07-11
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It has of course been noted that distance measuring devices using SPADs to detect the returning light do not provide sufficiently reliable measurement results especially under extremely light-intensive measuring conditions

Method used

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  • Photon detector with an immobilisable photon-sensitive element, in particular spad, and distancing measuring device comprising said type of photon detector
  • Photon detector with an immobilisable photon-sensitive element, in particular spad, and distancing measuring device comprising said type of photon detector
  • Photon detector with an immobilisable photon-sensitive element, in particular spad, and distancing measuring device comprising said type of photon detector

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Embodiment Construction

[0030] figure 1 A photon detector 1 is shown, in which a movably suppressable photon-sensitive element 5 and a photon-transmissive element 7 are arranged in a housing 3 . A light beam 11 projected from the outside enters the housing 3 through the window 9 and first impinges on the photon-transmitting element 7 . The photon-transmitting element 7 is here an at least partially transparent optical component made of a photochromic material, wherein the material has a higher light absorption at higher light intensities. An example of a photochromic material may be Phenanthropyran. This makes it possible to achieve that the light beam 13 transmitted through the photon-transmitting element 7 and finally impinging on the movable-suppressible photon-sensitive element 5 does not have an excessively high photon intensity even though the incident light beam 11 should have a very high light intensity. strength. The result of the detection by the photon sensitive element 5 is output at ...

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Abstract

The invention relates to a photon detector (1) comprising, in addition to an immobilisable photon-sensitive element (5), a photon transmission element (7). Said photon detector is configured such that it can vary photon intensities impacting upon the photon-sensitive element (5) and transmitted by the photon transmission element (7), for example, by modifying an absorption property or a defocussing property of the photon transmission element (7). Also, the immobile photon-sensitive element, which can be, for example a SPAD (Single Photon Avalanche Diode), always operates close to the optimal operating range and below an immobilisation range. The invention also relates to a distancing device comprising said type of photo detector.

Description

technical field [0001] The invention relates to a photon detector having at least one photon sensitive element which can be suppressed in motion, wherein the photon sensitive element can be formed, for example, with a SPAD (Single Photon Avalanche Diode; Einzelphotonenlawineddiode; Single Photon Avalanche Diode). Furthermore, the invention relates to a distance measuring device with such a photon detector. Background technique [0002] Distance-measuring devices are known which align a time-modulated light beam in the direction of a target object whose distance is to be determined from the measuring device and which at least partially detect The target object reflects or scatters the returning light and uses it to determine the distance to measure. Typical measuring ranges here lie in the distance range from a few centimeters to several hundred meters. [0003] In order to be able to measure the distance to a target object, the propagation time of photons sent from the mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S7/497G01S17/10H01L31/107G01J1/44G01S7/489
CPCG01J1/0403G01S7/4816G01J1/04G01J1/42G02F2203/52G01J1/0418G01S17/10G01J1/0411G01S7/497G01S7/489G01J1/0437G01J1/22G01J1/0448
Inventor A.艾塞勒O.沃尔斯特B.施米特克
Owner ROBERT BOSCH GMBH
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