Miniature biology intelligent-structure optical 3D image module and manufacturing process thereof

Abstract

The invention discloses a miniature biology intelligent-structure optical 3D image module and a manufacturing process thereof. The module comprises a laser diode, a lens, a copper piece base, a flexible circuit board, a heat sink, a plastic base and a diffractive optical component, wherein the copper piece base is integrally formed and is a hollow cylinder, the laser diode and the lens are respectively embedded into two ends of the copper piece base, a cylindrical copper piece base accommodating cavity is formed in a middle part of the plastic base, a diffractive optical component accommodating groove is formed in a top end and is used for accommodating the diffractive optical component, a heat sink accommodating groove is formed in a bottom end and is used for accommodating the heat sink,a pin of the laser diode is welded onto the flexible circuit board, the heat sink is arranged below the laser diode and the flexible circuit board, and flexible circuit board avoidance grooves are respectively formed in the copper piece base and the plastic base. The module is reasonable in structure, product focusing and assembly can be rapidly performed, the product quality is effectively ensured, material waste is prevented, and the production efficiency and the product yield are improved.

Description

technical field [0001] The invention relates to a miniature biological intelligent structured light module and a manufacturing process thereof, belonging to the technical field of camera module manufacturing. Background technique [0002] The laser light is emitted from the laser and then converged into a narrow band of light through the lens, which is called structured light. Structured light is a mainstream technology of depth cameras, which can be used in multiple application scenarios such as human-computer interaction, intelligent biometric identification, 3D modeling, AR, security and assisted driving. At present, during the processing of micro-biological intelligent structured light modules (with a size below 5.0mm×5.0mm×4.7mm), especially when the laser diode (LD) and the lens are focused, it is easy to cause the collimated spot to become larger or smaller. As a result, the focus is blurred and the imaging quality is affected. Since the focus effect of the two compo...

AI Technical Summary

Problems solved by technology

At present, during the processing of micro-biological intelligent structured light modules (with a size below 5.0mm×5.0mm×4.7mm), especially when the laser diode (LD) and the lens are focused, it is easy to cause the collimated spot to become larger or smaller. As a result, the focus is blurred and the imaging quality is affected. Since the focus effect of the two components cannot be confirmed during the assembly process, it leads to defects and scrapped materials.

Secondly, after the laser diode and the lens are focused, and then assembled with the diffractive optical element (DOE), it is easy to produce image shift from the focused laser diffracted by the DOE, which affects the imaging quality. The final imaging effect of the two components cannot be determined during the assembly process, resulting in Image offset and material scrap issues

Therefore, in the manufacturing process of biological intelligent structured light modules, materials are often scrapped due to focus blur and image offset problems, and new materials need to be continuously purchased for production, which affects customer delivery

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