MULTIPLE OPTICAL AXIS PHOTOELECTRIC SENSOR UNIT

• Main Authors: SUGA TAKAHIRO, NISHIUCHI SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 13.02.2020
• Subjects: BASIC ELECTRIC ELEMENTS; DETECTING MASSES OR OBJECTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; RELAYS; SELECTORS; TESTING

To provide a long distance between a light projecting/receiving unit and a mirror unit.SOLUTION: A multiple optical axis photoelectric sensor unit (1A) comprises: a light projecting/receiving unit including a light projecting element and a light receiving element; and a mirror unit including a first mirror structure (21) reflecting light from the light projecting element and a second mirror structure reflecting the light reflected on the first mirror structure (21) toward the light receiving element. The first mirror structure (21) is configured by arranging a plurality of V-shaped mirror parts (30) each including a first reflection surface (31) and a second reflection surface (32) provided perpendicular to the first reflection surface (31). A straight line (L) formed by V-shaped troughs of each V-shaped mirror part (30) is parallel to a plane including an optical path emitted from the light projecting element, reflected on the first mirror structure (21) to the second mirror structure.SELECTED DRAWING: Figure 4 【課題】投受光ユニットとミラーユニットとの間の距離を長くする。【解決手段】多光軸光電センサユニット（１Ａ）は、投光素子および受光素子を備える投受光ユニットと、投光素子からの光を反射させる第１ミラー構造（２１）、および、第１ミラー構造（２１）で反射された光を受光素子に向けて反射させる第２ミラー構造を備えるミラーユニットとを備える。第１ミラー構造（２１）は、第１反射面（３１）および第１反射面（３１）に垂直に設けられる第２反射面（３２）からなるＶ字形状ミラー部（３０）が複数並列された構造となっており、各Ｖ字形状ミラー部（３０）におけるＶ字の谷による直線（Ｌ）が、投光素子から出射し、第１ミラー構造（２１）において反射され、第２ミラー構造に至る光路を含む平面に平行となっている。【選択図】図４