Optical assembly and assembly method thereof, optical device and electronic equipment

Abstract

The invention provides an optical assembly and an assembly method thereof, an optical device and electronic equipment. The optical assembly includes a shell body. The shell body includes a side wall and a bottom wall. The bottom wall is connected to one end of the side wall. A first opening is formed in the other end of the side wall. The optical assembly further includes a collimating element arranged inside the shell body and a diffractive optical element arranged inside the shell body. The collimating element is used for collimating incident rays and generating collimating light. The diffractive optical element is arranged near the bottom wall relative to the collimating element. The diffractive optical element includes a diffraction section used for transforming the collimating light to structured light, a frame arranged around the diffraction section, a first adhesive layer and a second adhesive layer. The first adhesive layer is connected between the surface of oneside of the collimating element and the frame and extends to the side wall. A first slit is formed among the first adhesive layer, the side wall and the collimating element. An opening of the slit faces the first opening. The second adhesive layer is arranged in the slit.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to an optical component, an assembly method thereof, an optical device and electronic equipment. Background technique [0002] This section is intended to provide a background or context to a detailed description of the invention that is recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the development of science and technology, structured light technology is becoming more and more perfect. The 3D stereoscopic effect of depth images obtained based on structured light is stronger, and it has the advantages of stronger authenticity, high precision, and high safety factor. Therefore, structured light technology and application structure Devices such as depth cameras based on optical technology are gradually being applied to various mobile terminals. [0004] As an important component of the depth camera, the stru...

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Problems solved by technology

[0006] The structured light emission device includes a light source and a structured light emission component. In the prior art, the assembly process of the structured light emission component is as follows: figure 1 As shown, the collimation element 14 and the frame 15b of the DOE 15 are bonded through the first glue layer 16, and then the conductive glue 18 is placed on the edge of the bottom wall 11a of the housing 11 by local dispensing, and the bonded together The collimating element 14 and the DOE 15 are put into the casing 11, and the side of the frame 15b away from the collimating element 14 is bonded to the bottom wall 11a of the casing 11 by using the conductive adhesive 18, and the inner wall (mainly the side wall) of the casing 11 11b) The second colloid is injected into the slit x between other internal devices (collimation element 14, DOE15, etc.) to form the second glue layer 17, but the second colloid is easy to overflow to the diffraction part 105a of DOE15 facing the shell The surface of the bottom wall 11a of the body 11 causes the pattern of the structured light to be unexpected, thus affecting the imaging quality of the depth camera

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