Optical ranging device and optical ranging method
AssigneeNEC Corporation
InventorHidemi Noguchi
Life of this patent
Estimating the term…
Abstract
An optical ranging device (10) according to the present disclosure includes a light pulse generation unit (11) that generates a light pulse with a phase change point between a first phase modulation portion and a second phase modulation portion, a light-transmitting unit (12) that transmits the generated light pulse, a light-receiving unit (13) that receives a light pulse reflected from a measurement object by the transmitted light pulse, and a distance calculation unit (14) that calculates a distance to the measurement object, based on a phase change point of the transmitted light pulse and a phase change point of the received light pulse.
Claims19
An optical ranging device comprising:
- a light pulse generator configured to generate a light pulse with a phase change point between a first phase modulation portion and a second phase modulation portion;
- a light-transmitter configured to transmit the generated light pulse;
- a light-receiver configured to receive a light pulse reflected from a measurement object by the transmitted light pulse;
- and
- a distance calculator configured to calculate a distance to the measurement object, based on a phase change point of the transmitted light pulse and a phase change point of the received light pulse,
- wherein a phase of the first phase modulation portion changes with a first inclination with respect to time, and
- a phase of the second phase modulation portion changes with a second inclination different from the first inclination with respect to time.
An optical ranging method comprising:
- generating a light pulse with a phase change point between a first phase modulation portion and a second phase modulation portion;
- transmitting the generated light pulse;
- receiving a light pulse reflected from a measurement object by the transmitted light pulse;
- and
- calculating a distance to the measurement object, based on a phase change point of the transmitted light pulse and a phase change point of the received light pulse,
- wherein a phase of the first phase modulation portion changes with a first inclination with respect to time, and
- a phase of the second phase modulation portion changes with a second inclination different from the first inclination with respect to time.
Dependencies are inferred from the claim text.