OPTICAL SENSOR AND LIGHT-RECEIVING MODULE

To provide an optical sensor capable of securing a dynamic range while achieving resolution.SOLUTION: An optical sensor comprises: a light-receiving system that, with a first reference surface S1 and a second reference surface S2 which are orthogonal to each other as reference, applies positive power different each other on the reference surfaces S1, S2 to a longitudinal reflection beam along the first reference surface S1, and the more attenuates transmittance of the reflection beam, the farther from an optical axis ROA along the second reference surface S2; an aperture unit forming along the first reference surface S1, an optical aperture positioned at a focal point on the second reference surface S2 by the light-receiving system and transmitting the reflection beam subjected to optical action by the light-receiving system; and a light-receiving unit receiving the reflection beam transmitting through the optical aperture by a plurality of light receiving elements positioned at a focal point on the first reference surface S1 by the light-receiving system and arrayed two-dimensionally along the reference surfaces S1, S2.SELECTED DRAWING: Figure 6 【課題】解像度と両立させてダイナミックレンジを確保する光学センサの提供。【解決手段】光学センサは、互いに直交する第一基準面Ｓ１及び第二基準面Ｓ２を基準として、基準面Ｓ１，Ｓ２上で相異なる正パワーを、第一基準面Ｓ１に沿って長手の反射ビームに作用させる受光光学系であって、第二基準面Ｓ２に沿って光軸ＲＯＡから離間するほど反射ビームの透過率を減衰させる受光光学系と、受光光学系による第二基準面Ｓ２上の焦点に位置合わせされ、受光光学系から光学作用を受けた反射ビームを透過させる光学開口を、第一基準面Ｓ１に沿って形成するアパーチャユニットと、受光光学系による第一基準面Ｓ１上の焦点に位置合わせされ、基準面Ｓ１，Ｓ２に沿う二次元方向に配列される複数の受光素子により、光学開口を透過した反射ビームを受光する受光ユニットとを、備える。【選択図】図６