Light detection apparatus to include an exposure time period determination unit configured to determine a noise level base on first dark current and second dark current

摘要

A light detection apparatus includes an image sensor, a signal obtaining unit, an exposure-time-period determination unit, and an exposure controller. The signal obtaining unit is configured to obtain a first dark current being a dark current of the image sensor in a first exposure time period, and a second dark current being a dark current of the image sensor in a second exposure time period. The exposure-time-period determination unit is configured to determine an optimal exposure time period of the image sensor based on the first dark current and the second dark current. The exposure controller is configured to control the image sensor to be exposed to light for the optimal exposure time period.

主权项

1. A light detection apparatus, comprising:
an image sensor; a signal obtaining unit configured to obtain
a first dark current being a dark current of the image sensor in a first exposure time period, anda second dark current being a dark current of the image sensor in a second exposure time period; an exposure-time-period determination unit configured to determine a noise level based on the first dark current and the second dark current and a signal level based on a measurement current or by estimation, and to compute an optimal exposure time period based on the noise level and the signal level; and an exposure controller configured to control the image sensor to be exposed to light for the optimal exposure time period.