Abstract:
The present invention includes an imager 1 having an automatic exposure stopping function, which are implemented therein, and includes an exposure time measuring unit 24 to measure the exposure time from the start of exposure to the stopping of exposure in the imager 1, a measurement distance calculating unit 21 to calculate the measurement distance to an object M on the basis of a displacement of the light receiving position in the imager 1, and a data output/storage unit 25 to output and/or store , as data related with acquisition of a distance actual value, which is an actual distance to the object, in a condition in which the measured exposure time and the measurement distance calculated with this exposure time are associated with each other.
Abstract:
A projected light pulse generating circuit (6a, 6b) generates the plural pairs of the projected light pulses, which are projected light pulses having respective predetermined pulse widths and which have at least two type of different pulse intervals. A projected light pulse selector circuit (7) periodically selects and outputs each pair of the projected light pulses having different pulse intervals. A distance determining circuit (15) compares the farness or nearness of each of the measured distance, where the plural distances each measured for the projected light pulses of the pulse interval, and determines a detected distance on the basis of one of a far measured distance and a near measured distance, which is excluded in dependence on the timing of the pulse detection.
Abstract:
The present invention includes an imager 1 having an automatic exposure stopping function, which are implemented therein, and includes an exposure time measuring unit 24 to measure the exposure time from the start of exposure to the stopping of exposure in the imager 1, a measurement distance calculating unit 21 to calculate the measurement distance to an object M on the basis of a displacement of the light receiving position in the imager 1, and a data output/storage unit 25 to output and/or store , as data related with acquisition of a distance actual value, which is an actual distance to the object, in a condition in which the measured exposure time and the measurement distance calculated with this exposure time are associated with each other.
Abstract:
An optical wave distance measurement device shifts a binarizing threshold value, used during binarization of a received light signal, at a light projecting period and a non-light projecting period for a light projecting circuit (1). In addition, the optical wave distance measurement device: arranges measurement and reference laser diodes (LD1, LD2) for the light projecting circuit (1) together in near vicinity and measurement and reference dual gate MOSFETs (Q1 Q2) that drive same together in near vicinity, such that temperatures for the same type become similar; drives both the measurement and reference laser diodes (LD1, LD2) using the same drive current determined by the monitor current for one of the measurement and reference laser diodes (LD1, LD2); and causes a common light receiving circuit (2) to receive both the projected measurement light signal and the projected reference light signal.