RANGING APPARATUS AND RANGING METHOD
First Claim
1. A ranging apparatus comprising:
- a light-emitting unit for emitting a modulated light which is intensity-modulated;
a light-detecting unit for detecting a reflected light from an object that is irradiated with said modulated light;
a calculating unit for calculating a distance up to said object based on a phase difference between said modulated light and said reflected light;
an intermittent emission control unit for controlling said light-emitting unit to intermittently emit said modulated light to said object; and
an intermittent detection control unit for controlling said light-detecting unit to intermittently detect said reflected light based on the intermittent emission of said modulated light under the control of said intermittent emission control unit;
wherein said calculating unit includes a corrector for correcting the distance up to said object based on information produced by intermittently detecting said reflected light.
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Accused Products
Abstract
A first ranging apparatus includes a light emitter for emitting a modulated light which is intensity-modulated, a light detector for detecting a reflected light from an object that is irradiated with the modulated light, a distance calculator for calculating the distance up to the object based on the phase difference between the modulated light and the reflected light, and a gate controller. The gate controller outputs gate pulses to control a light emission controller to intermittently emit the modulated light to the object and also control an electrooptical shutter or an electronic shutter of an image capturing device to intermittently detect the reflected light from the object based on the intermittent emission of the modulated light.
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Citations
20 Claims
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1. A ranging apparatus comprising:
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a light-emitting unit for emitting a modulated light which is intensity-modulated; a light-detecting unit for detecting a reflected light from an object that is irradiated with said modulated light; a calculating unit for calculating a distance up to said object based on a phase difference between said modulated light and said reflected light; an intermittent emission control unit for controlling said light-emitting unit to intermittently emit said modulated light to said object; and an intermittent detection control unit for controlling said light-detecting unit to intermittently detect said reflected light based on the intermittent emission of said modulated light under the control of said intermittent emission control unit; wherein said calculating unit includes a corrector for correcting the distance up to said object based on information produced by intermittently detecting said reflected light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A ranging method comprising the steps of:
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a) emitting a modulated light which is intensity-modulated; b) detecting a reflected light from an object that is irradiated with said modulated light; c) calculating a distance up to said object based on a phase difference between said modulated light and said reflected light; d) controlling the emission of said modulated light to intermittently emit said modulated light to said object; and e) controlling the detection of said reflected light to intermittently detect said reflected light based on the intermittent emission of said modulated light in said step d); wherein said step c) comprises the step of correcting the distance up to said object based on information produced by intermittently detecting said reflected light. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification