To provided an object-detecting device for arbitrarily setting the zone shape of a detection zone formed by projection light that is outputted from a light projection part, an occupant detecting device, and an air bag- controlling device.
Two-dimensional projection light P nearly in a fan shape that is outputted from an LED part 14 is reflected by an object, and reflection light R enters a PSD part 16. Since the PSD part 16 is provided with PSDs 40A, 40B, 40C, and 40D, and the plurality of PSDs 40A, 40B, 40c, and 40D are arranged in a direction in parallel with the spreading direction of the projection light P, a detection zone S that is formed by the two-dimensional projection light P nearly in a fan shape that is outputted from a light projection part 11 is divided into detection zones SA, SB, SC, and SD in the spreading direction of the projection beam P. The size of the detection zones SA, SB, SC, and SD is prescribed by threshold positions SA1, SB1, SC1, and SD1 corresponding to the reference incident position since the reference incident position for detecting the entry of the object into the detection zones SA, SB, SC, and SD is arbitrarily set.
KURAHASHI AKIRA
ADACHI IZUMI
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