Optical device and apparatus

A technology of optical devices and optical components, which is applied in the field of optics, can solve problems such as DOE damage and irreversible damage to the human eye with a single point of energy, and achieve the effect of improving safety

Active Publication Date: 2018-12-11
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The laser single-point intensity after the DOE is broken up is harmless, but the DOE has the risk of position shifting or damage during equipment use. Once the DOE is damaged or the position moves, the laser light is not uniformly dispersed, and the single-point energy is too high. irreversible damage

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  • Optical device and apparatus
  • Optical device and apparatus
  • Optical device and apparatus

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Embodiment Construction

[0046] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0047] figure 1 is a frame of an optical device shown according to an exemplary embodiment Figure 1 , figure 2 is a frame of an optical device shown according to an exemplary embodiment Figure II . Such as figure 1 and figure 2 As shown, the optical device of this embodiment may include: a surface-emitting laser (not shown), an impedance detection circuit 11, a controller 12, and an op...

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Abstract

The present disclosure relates to an optical device and apparatus. The optical device comprises a surface-emitting laser, an impedance detection circuit, a controller and an optical component positioned on the light-emitting path of the surface-emitting laser. The optical module comprises a bracket and a diffractive optical element DOE positioned inside the bracket. Pairs of conductive contacts are arranged on the inner side wall of the bracket. A conductive film formed of a preset material is attached to the light-emitting surface of the DOE. The edge of the conductive film and the pair of conductive contacts are connected with each other through a conductive material. The impedance detection circuit is respectively connected with a pair of conductive contacts and a controller. The controller is also connected to the surface emitting laser and is configured to control the surface emitting laser to be turned off when the impedance detected by the impedance detection circuit is not within a preset range. Irrecoverable damage to the human eye caused by too high single point energy since laser emitted by the surface itting laser is not emitted uniformly due to movement or damage of the DOE is avoided, and the safety is improved.

Description

technical field [0001] The present disclosure relates to the field of optical technology, in particular to an optical device and equipment. Background technique [0002] Currently, more and more devices support face recognition based on surface-emitting lasers. [0003] In the related art, due to the high energy of the laser, it is dangerous to directly irradiate the human eyes without breaking up and homogenizing the laser. Therefore, the surface emitting laser usually needs to be combined with a diffractive optical element (Diffractive Optical Elements, DOE) to disperse the gathered laser light and emit it as a uniform surface light source. The laser single-point intensity after the DOE is broken up is harmless, but the DOE has the risk of moving or being damaged during the use of the equipment. irreversible damage. Contents of the invention [0004] To overcome the problems in the related art, the present disclosure provides an optical device and equipment. [0005]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042G06K9/00
CPCH01S5/042G06V40/161
Inventor 郝宁
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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