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Projection module, depth camera and method for adjusting focal length of projection module

A projection module and focal length technology, applied in the optical and electronic fields, can solve the problem that the projection module cannot be satisfied, and achieve the effect of simple operation

Inactive Publication Date: 2019-09-20
SHENZHEN ORBBEC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a projection module, a depth camera and a method for adjusting the focal length of the projection module, aiming at solving the problem that the projection module in the prior art cannot meet the requirements of the projection module to project projection patterns to different distances technical problem

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  • Projection module, depth camera and method for adjusting focal length of projection module

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Embodiment Construction

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. Attached below by reference Figure 1-7 The described embodiments are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0042] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or...

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Abstract

The invention belongs to the field of optical and electronic technologies, and particularly relates to a projection module, a depth camera and a method for adjusting the focal length of the projection module. The projection module comprises a fixed lens barrel, a light source, a moving lens barrel, a lens and an optical diffraction unit. The light source is arranged on the fixed lens barrel. The lens and the optical diffraction unit are arranged in the moving lens barrel. The moving lens barrel is movably arranged on the fixed lens barrel and moves along the axis of the fixed lens barrel. The light source, the lens and the optical diffraction unit are sequentially arranged along the axial direction of the fixed lens barrel. According to the invention, the projection module can meet the requirement that the projection module needs to project a projection pattern to different distances; and at the same time, the focal length of the projection module is adjustable, which can realize layout of products of different models and diversified needs of the projection module.

Description

technical field [0001] The invention belongs to the technical field of optics and electronics, and in particular relates to a projection module, a depth camera and a method for adjusting the focal length of the projection module. Background technique [0002] Existing laser projection modules usually include a laser light source, a projection lens, and an optical diffraction unit arranged along the optical path, and the above-mentioned optical elements are generally fixedly installed on the lens barrel. Once assembled and put into production, the laser projection module The focal length has been determined, and the laser projection module has a working range of depth of field. At a focal position far away from the laser projection module, the image formed by it will be blurred; at present, before the laser projection module is put into use, it must be adjusted first. focus so that its projected pattern is imaged on the focal plane. For the existing laser projection modules,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/42G03B21/14G02B7/04
CPCG02B27/4205G03B21/14G03B21/142G02B7/04
Inventor 罗乐华
Owner SHENZHEN ORBBEC CO LTD
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