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

Active Publication Date: 2021-07-13
VERTILITE CO LTD
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Problems solved by technology

The above-mentioned existing module structure, due to the arrangement of optical devices such as diffusers, on the one hand has extremely strict requirements on the precision of assembly between the components, which increases the complexity of the structure and production process, and at the same time for Supporting this optical system also requires a rigid frame with sidewalls to support the VCSEL array and optics to provide a minimum spacing (typically 0.3-0.5mm) between the two components, and the total thickness of the module is usually close to 1mm , and ultimately make it difficult to further reduce the thickness and volume of mobile phones and other devices that it is specifically applied to

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

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Embodiment Construction

[0065] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0066] attached figure 2 , 7 - The purpose of the optical field distribution imaging and waveform schematic diagrams in 8 and 12 is to reflect the effect achieved by the solution of the present invention and the comparison with the prior art, and the specific coordinate values ​​are not the key points to be presented.

[0067] The present invention provides a lensless VCSEL array that does not require a diffuser, and the array includes:

[0068] A p...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/40H01S5/42G03B21/20
CPCG03B21/2013G03B21/2033H01S5/4025H01S5/423
Inventor 梁栋张成
Owner VERTILITE CO LTD
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