Patent ID: 11914075
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A distance measurement apparatus for applying laser light to an object to be measured and measuring a distance to the object to be measured, based on light reflected by the object to be measured, the distance measurement apparatus comprising:
a laser light source configured to emit the laser light;
a laser light source control circuit, the laser light source control circuit comprising a processor for executing a program, and a storage device in which the program is stored, the processor executing the program to perform the operation of controlling the laser light source;
scanning means for two-dimensionally scanning the object to be measured with the laser light;
a casing configured to store the scanning means;
an opening formed in the casing, the opening being opened toward the object to be measured, the opening allowing the object to be measured to be exposed to the scanning means;
a reflecting means fixed to the casing for covering a part of a scan region by the laser light or a periphery of the scan region and reflecting the laser light; and
a light receiving means for receiving first light reflected by the object to be measured and second light reflected by the reflecting means, and outputting a received light signal,
wherein the laser light source control circuit is configured to apply a feedback control to the laser light source based on a feedback of the second light reflected from the reflecting means.