Object detection device

An object detection device for detecting an object in a measurement space, the device comprising:

• an optical scanning unit configured to scan the measurement space by measurement light emitted from a light emission unit and to guide reflected light from a reflector for the measurement light to a light receiving unit;
• a reflector detection unit configured to detect reflector information, the reflector information including a distance from the object detection device to the reflector calculated based on physical characteristics of the measurement light and the reflected light, a reflected light intensity detected by the light receiving unit, and a scanning direction of the measurement light;
• a region defining unit configured to define a plurality of object detection regions that at least partially overlaps each other;
• and
• an object determination unit configured to determine whether a target object is present in any one of the overlapping object detection regions, based on the reflector information detected by the reflector detection unit, wherein
• the object determination unit is configured to switch between a first determination mode and a second determination mode, the object determination unit under the first determination mode determining that the target object is present in each one of the overlapping regions, the object determination unit under the second determination mode determining that the target object is present only in a particular one of the overlapping regions.