Optical detection device, optical distance measurement device, and non-transitory computer readable medium

Abstract

An optical detection device includes a light emitter that irradiates an area of interest; a light receiver that receives reflected light that has been emitted by the light emitter and reflected on a detection object, the light receiver including plural light-receiving elements divided into plural light reception sections; and a processor configured to perform at least one of full irradiation for irradiating the whole area of interest and full light reception for outputting all light reception results and at least one of partial irradiation for irradiating part of the area of interest and partial light reception for outputting part of the light reception results one part by one part and perform an object detection process for detecting the detection object in accordance with light received by the light receiver. The processor is configured to, based on a difference between an amount of received light received at each of the light reception sections at a time when the light emitter performs the full irradiation and an amount of received light received at each of the light reception sections at a time when the light emitter performs the partial irradiation, perform an indirect light detection process for detecting that at least one of the plural light reception sections receives indirect light when the light emitter performs the full irradiation.