A light-guiding structure with multiple reflective surfaces and an ultra-macro imaging module including the same

Abstract

This invention discloses a multi-reflective surface light guide structure. The image-side end face has a first groove facing the illuminator, with the bottom of the groove forming a focusing surface. Multiple reflective surfaces are arranged inside, including: a beam-splitting reflective surface formed by the bottom of a second groove on the object-side end face in front of the first groove; a back-reflective surface formed by the bottom of a third groove on the image-side end face to the side of the first groove; and an exit-front reflective surface formed by the object-side wall in front of the third groove, outside the exit-front reflective surface. The light path includes light from the illuminator entering through the focusing surface, then sequentially passing through the beam-splitting reflective surface, the back-reflective surface, and the exit-front reflective surface, finally exiting from the exit-front reflective surface and striking the object surface. Through optimized structural design, the imaging module is compact, lightweight, highly reliable, and produces good image quality. By constructing multiple reflective surfaces, multiple light guide paths are formed, ensuring sufficient and uniform illumination from the portable imaging device illuminator, while also facilitating manufacturing and assembly.

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