A vcsel array, manufacturing method, flat-top far-field generation method, and lighting module

An array, flat-top technology, applied in the field of vertical cavity surface emitting lasers (VCSELs), can solve the problem that the thickness and volume of mobile phones and other equipment are difficult to further reduce, and achieve the effect of reducing the cost of modules
CN110649466BActive Publication Date: 2021-07-13VERTILITE CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
VERTILITE CO LTD
Publication Date
2021-07-13

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Abstract

The invention provides a VCSEL array, a manufacturing method, a flat-top far-field generation method, and an illumination module. Compared with the traditional VCSEL array, a uniform flat-top far-field can be easily realized without installing optical elements such as a diffuser. field, thereby significantly reducing the cost of the array and the corresponding modules while meeting the needs of TOF measurement. At the same time, due to the cancellation of the diffuser, the corresponding parts such as the side wall column and the diffuser cover are also omitted, so that the thickness of the module is significantly reduced, and it has many beneficial effects that are not available in the prior art.
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Description

technical field

[0001] The invention relates to the technical field of vertical cavity surface emitting lasers (VCSEL), in particular to a lensless VCSEL unit and a corresponding illumination field generation method. Background technique

[0002] At present, in many smart devices such as smart phones, there is a huge market demand for flat-top infrared illumination (IR) projection modules, which play a vital role in specific applications such as TOF measurement and security camera equipment. The vertical cavity surface emitting laser (VCSEL) is the core device in the flat-top infrared illumination projection module.

[0003] Existing flat-top infrared lighting projection modules generally include a combination of VCSEL arrays and optical devices such as diffusers in structure. The emission hole of a typical VCSEL array is usually rectangular or circular, and the spatial light distribution (far field) is usually Gaussian or circular. This kind of far field is non-uniform and...

Claims

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