Laser projection apparatus comprising Fresnel lens

A Fresnel lens and laser projection technology, used in the fields of optics and electronics to improve beam quality

Pending Publication Date: 2017-11-17
SHENZHEN ORBBEC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problem of how to improve the beam quality in the laser projection devic

Method used

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  • Laser projection apparatus comprising Fresnel lens
  • Laser projection apparatus comprising Fresnel lens
  • Laser projection apparatus comprising Fresnel lens

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Embodiment Construction

[0018] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] It should be understood that the terms "first distance", "second distance", "upper", "lower", "front", "rear", "upright", "horizontal", "inner", "outer", The orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiment of the present inven...

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Abstract

The invention discloses a laser projection apparatus. The laser projection apparatus comprises a light source, a collimation unit and a diffraction optical element, wherein the light source is used for emitting laser; the collimation unit is used for focusing the laser emitted by the light source so as to project parallel light beams to the diffraction optical element; the diffraction optical element is used for performing beam expansion on the parallel light beams to form laser patterns; and the collimation unit comprises a combination of multiple Fresnel lenses or a combination of a common lens and at least one Fresnel lens. By virtue of the laser projection apparatus, spherical aberration is eliminated and light beam quality is improved, and the laser projection apparatus is mainly applied to a depth camera.

Description

technical field [0001] The invention relates to the fields of optics and electronics technology, in particular to a laser projection device. Background technique [0002] Laser projection devices are used in various fields. For example, in the field of optical-based three-dimensional measurement, laser projection devices can be used to emit coded or structured optical patterns to the target space to achieve calibration of the target space and provide preparations for later three-dimensional measurement. A laser projection device generally consists of a substrate, a light source, a controller, a collimation unit, and a diffractive optical element. The collimation unit can be a single lens or a combination of multiple lenses. [0003] As an important part of the laser projection device, the collimation unit directly affects the volume and performance of the laser projection device. Generally, the collimation unit uses a spherical lens as the collimation lens. This type of le...

Claims

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Application Information

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IPC IPC(8): G03B21/20
CPCG03B21/2033G03B21/208
Inventor 王兆民邓想全
Owner SHENZHEN ORBBEC CO LTD
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