CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2018-173543, filed on Sep. 18, 2018 the entire contents of which are incorporated herein by reference.

FIELD

Embodiments of the present invention relate to a distance measuring device and a distance measuring method.

BACKGROUND

There is known a distance measuring device called LIDAR (Light Detection and Ranging, Laser Imaging Detection and Ranging). The distance measuring device irradiates laser light on a measurement target object and converts the intensity of reflected light reflected by the measurement target object into a time-series measurement signal on the basis of an output of a sensor. Consequently, the distance to the measurement target object is measured on the basis of a time difference between a point in time of emission of the laser light and a point in time corresponding to a peak of a signal value of the measurement signal.

However, when the number of input photons per unit time to a sensor increases, an output signal value of the sensor is sometimes saturated. Measurement accuracy is likely to be deteriorated.

