Structured light projector, three-dimensional camera module and terminal equipment

A projector and structured light technology, applied in the field of image processing, to achieve the effect of reducing the length of the optical path, low production cost, and reducing the height

Inactive Publication Date: 2019-05-14
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] It can be seen from the above that because the existing structured light projector needs a relatively long optical path to make the projection area of ​​the light beam emitted by the light source reach the predetermined projection diameter, that is, the diameter of the lens, the height of the existing structured light projector is relatively high. The development trend of mobile terminals is light and thin development, so the height of structured light projectors has become the biggest factor restricting the application of structured light projectors in mobile terminals

Method used

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  • Structured light projector, three-dimensional camera module and terminal equipment
  • Structured light projector, three-dimensional camera module and terminal equipment
  • Structured light projector, three-dimensional camera module and terminal equipment

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] The structured light projector provided by the embodiment of the present invention is applied to a 3D camera module, such as figure 2 As shown, the structure of a 3D camera module provided by the embodiment of the present invention is as follows figure 2 shown, including:

[0050] The structured light projector 201 is configured to project a preset structured light image. Among them, structured light is light with a specific pattern, which has pattern im...

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Abstract

The invention discloses a structured light projector, a three-dimensional camera module and terminal equipment, and the structured light projector comprises a light source array which is used for emitting at least two light beams; The lens array is used for collimating the at least two beams of light emitted by the light source array so as to obtain at least two collimated independent coherent light beams; And the diffractive optical element array is used for modulating the at least two collimated independent coherent light beams to obtain at least two diffracted light beams. By using the structured light projector, the light path length between the light source array and the lens array can be reduced, so that the height of the structured light projector can be reduced, and the structuredlight projector can be light and thin.

Description

technical field [0001] The invention relates to image processing technology, in particular to a structured light projector, a three-dimensional camera module and terminal equipment. Background technique [0002] Distance information has important applications in object recognition, path planning, and scene restoration. Humans can easily determine how far away an obstacle is, but for clumsy robots, this task becomes quite difficult. As distance information becomes more and more important in various application fields, depth detection naturally becomes the focus of research. In order to obtain the depth information of an object, a common method is to obtain a depth image, where the pixel value of the depth image can reflect the distance from the object in the scene to the camera. Methods for acquiring depth images can be divided into two categories: passive ranging sensing and active depth sensing. [0003] Among them, the most commonly used method in passive ranging sensin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/243G03B21/20G03B17/54
CPCG02B27/42G01B11/2513G03B21/00G03B21/2033H04N23/56H04N23/60G02B27/4222G03B21/145G03B21/2013
Inventor 李安刘迎春
Owner HUAWEI TECH CO LTD
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