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Light projection calibration device

A correction device, light projection technology, applied in the direction of using optical devices, projection devices, measuring devices, etc., can solve problems such as difficulty, deterioration of three-dimensional detection quality, etc.

Inactive Publication Date: 2020-05-05
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although when assembling the light-emitting components and optical components, the light-emitting components and optical components can be placed on the auxiliary frame jig in order to align the two components, but it is still very difficult to reduce the alignment error to an acceptable level
If the lighting components and optical components are not properly aligned, the quality of the subsequent 3D inspection will deteriorate

Method used

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Embodiment Construction

[0035] figure 1 It is a schematic diagram of a light projection correction device 100 in an embodiment. The light projection correction device 100 may include a light emitting component 110 , an optical component 120 and a far field plane 130 . The light-emitting component 110 can be used to emit at least a first light L1, and includes a plurality of first light-emitting points P11. The first light-emitting points P11 can be used to emit at least a first light L1 and be arranged in order to form a predetermined pattern PT. The optical component 120 can be disposed according to the position of the light emitting component 110, and is used to diffract at least the first light L1 to generate the diffracted light Ld1. The diffracted light Ld1 can be projected onto the far-field plane 130 to generate at least a plurality of fan-out points P21 on the far-field plane 130 . The fan-out point P21 can be analyzed to obtain (described later) the light intensity waveform. The light in...

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Abstract

A light projection calibration device includes a light emission element and an optical element. The light emission element is used to emit light and includes a plurality of light emission points. Theplurality of light emission points are used to emit the light and orderly arranged to form a predetermined pattern. The optical element is disposed according to position of the light emission elementand used to diffract the light to generate diffracted light. The diffracted light is projected to a far field plane to generate a plurality of fan-out points on the far field plane. The fan-out pointsare analyzed to obtain a light intensity waveform used to determine whether the light emission element and the optical element are aligned to an acceptable level.

Description

【Technical field】 [0001] The present invention relates to a light projection correction device, in particular to a light projection correction device for judging whether the light-emitting component and the optical component are aligned to an acceptable level. 【Background technique】 [0002] In the field of 3D detection, there are solutions that emit light points and diffract the light points to the surface of the detected object (such as the user's face) through optical components, and then observe the distribution of light points on the detected object , so as to establish a three-dimensional model of the surface of the detected object. In order to achieve the above purpose, the light-emitting component and the above-mentioned optical component must overlap to generate light spots. However, aligning light-emitting components and corresponding optical components is not an easy task. Although when assembling the light-emitting component and the optical component, the light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25G02B27/42
CPCG01B11/2504G01B11/2513G02B27/4205G02B27/62G03B43/00G01J1/4257G02B27/0944G02B27/30G03B21/204
Inventor 刘逸秾纪政宏萧名淑
Owner HIMAX TECH LTD
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