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Laser power control method and laser

A technology of lasers and emission power, applied in the field of lasers, can solve the problems of weak laser level, inability to disperse lasers, reduce beam energy, etc., and achieve the effect of improving reliability

Inactive Publication Date: 2019-02-01
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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Problems solved by technology

[0003] For example: infrared lasers are currently used in face recognition and 3D applications. Infrared lasers disperse the concentrated laser beams through diffractive optical elements (Diffractive Optical Elements, DOE) lenses. Under normal circumstances, the scattered laser beams of DOE can reduce the beam Energy, to a certain extent, protects the user from laser damage, but when the DOE lens is displaced or damaged, it will not be able to disperse the laser or the degree of dispersing the laser is very weak

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  • Laser power control method and laser
  • Laser power control method and laser
  • Laser power control method and laser

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Embodiment Construction

[0047] 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 this disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0048]As mentioned above, lasers have been widely used in the medical field, face recognition and other fields. The principle of the laser is: the light emitting element emits light, the grating lens breaks up the emitted light, and emits the scattered light. For example: infrared lasers are currently used in face recognition and 3D applications. Infrared lasers disperse the concentrated lase...

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Abstract

The invention relates to a laser power control method and a laser. The laser comprises a light transmitting element, a light receiving element, a grating lens and a processor, wherein the light transmitting element is used for transmitting light; the grating lens is used for dispersing the transmitted light; the light receiving element is used for receiving the reflected light generated during theprocess of dispersing the transmitted light by the grating lens and converting the reflected light to current signals; and the processor is used for controlling the light transmitting power of the light transmitting element according to the current signals. Thus, the reliability of an infrared laser is improved.

Description

technical field [0001] The present disclosure relates to the technical field of lasers, in particular to a method for controlling power of a laser and the laser. Background technique [0002] Lasers have been widely used in the medical field, face recognition and other fields. The principle of the laser is: the light emitting element emits light, the grating lens breaks up the emitted light, and emits the scattered light. [0003] For example: infrared lasers are currently used in face recognition and 3D applications. Infrared lasers disperse the concentrated laser beams through diffractive optical elements (Diffractive Optical Elements, DOE) lenses. Under normal circumstances, the scattered laser beams of DOE can reduce the beam Energy, to a certain extent, protects the user from laser damage, but when the DOE lens is displaced or damaged, it will not be able to disperse the laser or the degree of dispersing the laser is very weak. Contents of the invention [0004] Embo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S5/06
CPCH01S3/10H01S5/06
Inventor 郝宁
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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