ENTIRE CELESTIAL SPHERE TYPE IMAGING DEVICE

• Main Authors: TANAKA TOMONORI, SAWAGUCHI SATOSHI, SHOHARA MAKOTO, TAKENAKA HIROICHI, IMAE NOZOMI, TERAO NORIYUKI, SATO HIROYUKI, IRINO YOSHIAKI, MASUDA KENSUKE, YAMAMOTO HIDEAKI, HARADA TORU, BESSHO DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2017
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To achieve a compact entire celestial sphere type imaging device by effectively solving the problem in imaging optical systems used in the entire celestial sphere type imaging device that an incident light flux is blocked by a substrate on which an imaging sensor is provided.SOLUTION: In an entire celestial sphere type imaging device, two imaging optical systems of the same structure including a wide-angle lens having a field angle larger than 180 degrees and an imaging sensor for imaging an image formed by the wide-angle lens are combined, and an image in a solid angle of 4π radian is obtained by synthesizing the images imaged by the imaging optical systems. In each of the imaging optical systems, the wide-angle lens is formed by arranging, in order from an object side to an image side, a front group, a reflection surface, and a rear group, and is configured to bend an optical axis of the front group by the reflection surface at 90 degrees toward the rear group. Size and a shape of a substrate are defined in such a way that a light beam from the wide-angle lens when the field angle is maximum is not blocked by the substrate.SELECTED DRAWING: Figure 1 【課題】全天球型撮像装置に用いられる撮像光学系の、撮像センサを設けた基板により入射光束が遮られる問題を有効に解決し、小型の全天球型撮像装置を実現する。【解決手段】１８０度より広い画角を持つ広角レンズと、この広角レンズによる像を撮像する撮像センサとによる同一構造の撮像光学系を２つ組み合わせ、各撮像光学系により撮像された像を合成して４πラジアンの立体角内の像を得る全天球型撮像装置における撮像光学系であって、広角レンズは、物体側から像側へ向かって、前群、反射面、後群を配してなり、前記反射面により前群の光軸を前記後群に向かって９０度折り曲げるものであり、基板が、広角レンズの最大画角光線を遮らないように、基板のサイズおよび形状が定められている。【選択図】図１