Abstract: The range-finding apparatus (1) includes a light source (200), an optical receiver (1103), a setting unit (100), a detector (1100), and a calculation unit (300). The light source (200) projects light with a first irradiation pattern in a first period and projects light with a second irradiation pattern in a second period. The optical receiver (1103) receives light to output a pixel signal. The setting unit (100) sets a reference signal on the basis of the pixel signal in the first period. The detector (1100) detects whether or not the pixel signal varies from the reference signal by a first value or more in the second period and outputs a first detection signal indicative of a result obtained by the detection. The calculation unit (300) calculates a distance to a to-be-measured object using the first detection signal.

Abstract: The range-finding apparatus (1) includes an optical receiver (110), a light source unit (200), a converter (134), and a calculation unit (300). The optical receiver (110) receives light to output a pixel signal. The light source unit (200) projects light with a first irradiation pattern in a first period and projects light with a second irradiation pattern in a second period. The converter (134) sequentially converts the pixel signal bit by bit using binary search to output a first digital signal and a second digital signal, the first digital signal being output by performing the conversion with a first bit width in the first period, the second digital signal being output by performing the conversion with a second bit width in the second period, the second bit width being less than the first bit width. The calculation unit (300) calculates a distance on the basis of the first digital signal and the second digital signal.