Measuring device including light source that emits at least one light pulse group, photodetector, and control circuit
First Claim
1. A measuring device comprising:
- a light source that emits at least one light pulse group toward a target part of an object, the at least one light pulse group each including light pulses emitted sequentially;
a photodetector that detects at least a part of at least one reflected light pulse group, the at least one reflected light pulse group including reflected light pulses sequentially returning from the target part; and
a control circuit that controls the light source and the photodetector, wherein;
the control circuit causes the light source to emit the at least one light pulse group within a first period,the control circuit causes the photodetector to extract a first component within the first period, the first component being a component of light included in at least a part of a leading reflected light pulse of the reflected light pulses, andthe control circuit causes the photodetector to output a first electric signal corresponding to the first component.
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Accused Products
Abstract
A measuring device includes: a light source that emits, toward a target part of an object, at least one light pulse group each including light pulses emitted sequentially, a photodetector that detects at least a part of at least one reflected light pulse group and including reflected light pulses sequentially returning from the target part, and a control circuit that controls the light source and the photodetector. The control circuit causes the light source to emit the at least one light pulse group within a first period, causes the photodetector to extract, within the first period, a first component that is a component of light included in at least a part of a leading reflected light pulse of the reflected light pulses, and causes the photodetector to output a first electric signal corresponding to the first component.
20 Citations
17 Claims
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1. A measuring device comprising:
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a light source that emits at least one light pulse group toward a target part of an object, the at least one light pulse group each including light pulses emitted sequentially; a photodetector that detects at least a part of at least one reflected light pulse group, the at least one reflected light pulse group including reflected light pulses sequentially returning from the target part; and a control circuit that controls the light source and the photodetector, wherein; the control circuit causes the light source to emit the at least one light pulse group within a first period, the control circuit causes the photodetector to extract a first component within the first period, the first component being a component of light included in at least a part of a leading reflected light pulse of the reflected light pulses, and the control circuit causes the photodetector to output a first electric signal corresponding to the first component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A measuring device comprising:
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a light source that emits at least one light pulse group and at least one second light pulse toward a target part of an object, the at least one light pulse group each including first light pulses emitted sequentially; a photodetector that detects at least a part of at least one reflected light pulse group and at least a part of at least one second reflected light pulse returning from the target part, the at least one reflected light pulse group including first reflected light pulses sequentially returning from the target part; and a control circuit that controls the light source and the photodetector, wherein; the control circuit causes the light source to emit the at least one light pulse group within a first period, the control circuit causes the photodetector to extract a first component within the first period, the first component being a component of light included in at least the part of the at least one reflected light pulse group, the control circuit causes the photodetector to output a first electric signal corresponding to the first component, the control circuit causes the light source to emit the at least one second light pulse at a timing within the first period or within a second period that is different from the first period, the timing being different from a timing at which the at least one light pulse group is emitted, the control circuit causes the photodetector to extract a second component within the first period or within the second period, the second component being a component of light included in the at least one second reflected light pulse during a falling period, the falling period being a period from a point in time at which the at least one second reflected light pulse starts decreasing in light power to a point in time at which the at least one second reflected light pulse finishes decreasing in light power, and the control circuit causes the photodetector to output a second electric signal corresponding to the second component. - View Dependent Claims (17)
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Specification