OPTICAL DEVICE AND RANGE-FINDING DEVICE

To enable a pair of light projection/reception systems to range-find a broad range in a TOF method range-finding device.SOLUTION: An optical device is provided with a pair of light projection/reception systems having a light projection part and a light reception part provided side by side. Each light projection/reception system is arranged in a housing so that non-measurement surfaces face squarely. When viewing each light projection/reception system with the non-measurement surfaces caused to face squarely in a two-dimensional plane, a light projection part and a light reception part of one light projection/reception system, and a light projection part and a light reception part of other light projection/reception system are arranged in the housing so as to be in a point symmetrical position relation. Then, a ratio of a light projection range of each light projection part and a ratio of a light reception range of each light reception part are adjusted respectively so that an entire light projection range adding the light projection ranges of each light projection part corresponds to an entire light reception range adding the light reception ranges of each light reception part.SELECTED DRAWING: Figure 5 【課題】ＴＯＦ方式の測距装置において、一対の投受光系で広範囲の測距を可能とする。【解決手段】投光部及び受光部が並設された投受光系を一対備え、各投受光系を、非測定面部同士が相対向するように筐体に配置する。また、非測定面部同士を相対向させた状態の各投受光系を二次元平面上で見た場合に、一方の投受光系の投光部及び受光部と、他方の投受光系の投光部及び受光部は、点対称の位置関係となるように筐体に配置する。そして、各投光部の投光範囲を合わせた全投光範囲が、各受光部の受光範囲を合わせた全受光範囲に相当するように、各投光部の投光範囲の割合及び各受光部の受光範囲の割合をそれぞれ調整する。【選択図】図５