Composite prism module, image capturing module and assembling method of composite prism module

Abstract

The invention discloses a composite prism module which comprises a first prism, a second prism and a prism frame. The first prism is provided with a first light incident surface, a first reflecting surface and a first light emergent surface which are connected with each other, and the first light incident surface and the first light emergent surface are connected with each other at a first side edge. The second prism is provided with a second light incident surface, a second reflecting surface and a second light emergent surface which are connected with each other. The second light incident surface and the second light emergent surface are connected with each other at a second side edge. The prism frame is provided with a bottom surface, a first inclined side surface and a second inclined side surface, wherein the first inclined side surface and the second inclined side surface extend from two opposite sides of the bottom surface. The first reflecting surface is fixed on the first inclined side surface, and the second reflecting surface is fixed on the second inclined side surface, so that the first incident surface and the second incident surface are mutually connected and coplanar, and the first side edge and the second side edge are mutually parallel and far away from each other.

Description

technical field [0001] The present invention relates to a double prism structure, in particular to a compound prism module, an image capture module using the compound prism module and an assembly method of the compound prism module. Background technique [0002] In the case where wide-angle photography is required, in order to avoid image distortion caused by a single large field of view, a dual prism structure will be used for image acquisition. After two prisms are used to obtain small field of view images, they will be spliced ​​into a large field of view through back-end processing. image. [0003] In order to make the light incident surfaces of the double prisms coplanar, the corresponding corners between the two prisms will be cut, and the two prisms will be connected with optical glue to form a suture line between the two prisms, so as to pass through the two prisms. A stitching method ensures that the light incident surfaces of the double prisms are coplanar. Durin...

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