DISTANCE MEASURING SYSTEM AND MOVING OBJECT SYSTEM

• Main Authors: AIHARA MASAYUKI, HACHITSURI SEIKO, MATSUMURA YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 28.02.2019
• 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; GYROSCOPIC INSTRUMENTS; HOLOGRAPHY; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SURVEYING; TESTING

To divide an imaging region of one imaging element into a high distance measurement accuracy region and a relatively low region and set a region in which a distance is measured with high accuracy.SOLUTION: The present invention comprises an imaging device 120 including an optical system 122 and a distance measurement unit 105 for calculating a distance to a target on the basis of the image data acquired from an imaging element 121. The optical system 122 is provided with a free-form surface lens 123 which is rotationally asymmetrical and has such a shape that an image can be formed on an imaging plane so that resolution of a first region that is the region of a front portion is higher than resolution of a second region that is the region of a lateral portion. With an arrangement direction of the first and second regions defined as a horizontal direction and a direction orthogonal to the arrangement direction defined as a vertical direction, the free-form surface lens 123 is shaped to allow an image to be formed in such a way that the resolution at a position apart by a prescribed first distance from a center of the first region in the vertical direction and the resolution at a position apart by the first distance from the center of the first region in the horizontal direction are different from each other.SELECTED DRAWING: Figure 11 【課題】一つの撮像素子における撮像領域を測距精度の高い領域と比較的低い領域に分け高精度に測距を行う領域を設ける。【解決手段】光学系１２２を有する撮像装置１２０と、撮像素子１２１から取得した画像データに基づき対象物までの距離を算出する測距部１０５とを備え、光学系１２２は、正面部分の領域である第一領域の解像度が側方部分である第二領域の解像度よりも高くなるように撮像面に結像させることのできる形状を有し、回転非対称な自由曲面レンズ１２３を備え、第一領域と第二領域の並び方向を水平方向とし、前記並び方向と直交する方向を垂直方向とした場合、自由曲面レンズ１２３は、垂直方向において、第一領域の中心から所定の第一距離の位置における解像度と、水平方向において、第一領域の中心から前記第一距離の位置における解像度とが異なるように結像させることのできる形状である。【選択図】図１１