| CPC H04N 13/218 (2018.05) [H04N 13/229 (2018.05); H04N 2013/0088 (2013.01)] | 2 Claims |
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1. A non-blind-area multi-view panoramic stereo imaging device, comprising: a front lens assembly (18), an aspheric mirror (5), a middle lens assembly (6), a panoramic block (3), a rear lens assembly (4) and an image surface (7) which are longitudinally arranged along an optical axis;
the aspheric mirror (5) comprises a central hole (19) and an annular reflecting surface (8) which are arranged in the middle;
the panoramic block (3) comprises a front central circular transmission surface (13), a front reflecting surface (11), a front transmission surface (9), a rear reflecting surface (10) and a rear transmission surface (12); the front central circular transmission surface (13) is located at the front central position of the panoramic block (3), and the rear transmission surface (12) is located at the rear central position of the panoramic block (3); the front reflecting surface (11), the front transmission surface (9) and the rear reflecting surface (10) are all annular surfaces; the inner edge of the front reflecting surface (11) is connected with the edge of the front central transmission surface (13), the edge of the front transmission surface (9) is respectively connected with the outer edge of the front reflecting surface (11) and the outer edge of the rear reflecting surface (10), and the inner edge of the rear reflecting surface (10) is connected with the edge of the rear transmission surface (12);
the front reflecting surface (11) in the panoramic block (3) reflects a light path toward the image surface, and the rear reflecting surface (10) reflects the light path away from the image surface, so that a large-FOV (Large-Field-Of-View) light ray is reflected by the two reflecting surfaces of the panoramic block (3), exits from the panoramic block (3) at a small angle, enters the rear lens assembly (4), and is imaged on the image surface (7); and
the curvature radius of the front central circular transmission surface (13) is the same as that of the front reflecting surface (11), and is different from that of the front transmission surface (9); and the curvature radii of the rear reflecting surface (10) and the rear transmission surface (12) are the same;
wherein the imaging device comprises three light path channels, the first light path channel is configured to image a lateral field by using the panoramic block (3), and an image point P1 is located in an external annular area (15) of a detection image surface; the second light path channel is configured to reflect light by the aspheric mirror (5) and then image the lateral field by the front central circular transmission surface (13) of the panoramic block (3), and an image point P2 is located in an internal annular area (14) of a detection image surface; the third light path channel is configured to use the front lens assembly (18) to fold the light path; the light ray passes through the central hole (19) of the coaxially placed aspheric mirror (5) and the front central circular transmission surface (13) of the panoramic block (3) in turn, and finally reaches a central circular area (16) for imaging; the external annular area (15) of a detection image surface, the internal annular area (14) of a detection image surface and the central circular area (16) do not interfere with one another, so that non-blind-area large-FOV stereo imaging is realized;
wherein the third light path channel is configured to use the front lens assembly (18) to fold a light ray (17); wherein the light rays in the first light path channel and the second light path channel are emitted from a same object point, and the light ray (17) is from a different object point.
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