Holographic lens

Abstract

A panoramic imaging lens (20) having an annular incident surface (22) formed in a substantial convex lens form; a first reflective surface (23) formed in an annular concave mirror form to reflect light inside the lens; a second reflective surface (24) provided at a central part inside the annular light incident surface (22) to reflect the reflected light from the first reflective surface (23) toward an inner part of the annular first reflective surface (23); and a light outgoing surface (25) positioned at a central part inside the annular first reflective surface (23) and opposing the second reflective surface (24) to transmit light. A non-reflective part (26) exerting no regular reflection of light is provided on a light path toward the light incident surface amongst light paths of light proceeding to agree with a light path of imaging light incident on and refracted at the light incident surface (22) and proceeding inside the lens, which are light paths of light partly and inwardly reflected by the light incident surface (22) from the interior of the lens toward the interior (20) of the lens. <IMAGE>

Description

technical field [0001] The present invention relates to a panoramic photography lens which can capture a 360° side view as a ring image. Background technique [0002] At present, there are lenses disclosed in USP4566763 and USP5473474 as panoramic photography lenses capable of photographing a 360° field of view at one time. The panoramic photography lens 1 such as figure 1 As shown, it is formed rotationally symmetrically around the optical axis which is the central axis of the lens by a light-transmitting material such as optical glass or transparent resin. This panoramic photography lens 1 includes a ring-shaped light incident surface 2 that allows side light to enter from a 360° circumference; it is adjacent to the light incident surface 2 and forms a ring shape that is substantially opposed to the first reflector that reflects light into the lens 1. surface 3 ; the second reflective surface 4 provided at the center of the ring of the light incident surface 2 , and refl...

AI Technical Summary

Problems solved by technology

In addition, when the panoramic shooting system is used as a surveillance camera, etc., there are disadvantages such as that the flare or ghost affects the adjustment of the light quantity and deteriorates the quality of the captured image.

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