LASER RADAR DEVICE
1 Assignment
0 Petitions
Accused Products
Abstract
A laser radar device mounted on a vehicle includes a first laser emission part configured to generate a measuring laser beam by using a laser beam emitted from a laser source and to illuminate a predetermined area in a front traveling direction and a second laser emission part configured to generate a measuring laser beam by using the laser beam emitted from the laser source. A beam spread angle, viewed from a side of the vehicle, of the measuring laser beam generated by the second laser emission part is larger than a beam spread angle, viewed from a side of the vehicle, of the measuring laser beam generated by the first laser emission part.
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Citations
8 Claims
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1-4. -4. (canceled)
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5. A laser radar device mounted on a vehicle, comprising:
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a first laser emission part configured to generate a measuring laser beam by using a laser beam emitted from a laser source and to illuminate a predetermined area in a front traveling direction; and a second laser emission part configured to generate a measuring laser beam by using the laser beam emitted from the laser source and to illuminate a predetermined area on a road surface; wherein a road-surface beam spread angle, viewed from a side of the vehicle, of the measuring laser beam generated by the second laser emission part is larger than a front beam spread angle, viewed from a side of the vehicle, of the measuring laser beam generated by the first laser emission part, and wherein the number of irradiations per unit time by the laser radar device is a sum of the number of irradiations per unit time by the first laser emission part and the number of irradiations per unit time by the second laser emission part, wherein, if the number of irradiations per unit time by the laser radar device is limited to a predetermined number, a larger number of irradiations is allocated to the first laser emission part for the first laser emission part to illuminate the predetermined area in the front traveling direction, compared with a case where the road-surface beam spread angle is smaller than or equal to the front beam spread angle, because the number of irradiations necessary for illuminating the predetermined area on the road surface by the second laser emission part decreases, and wherein the road-surface beam spread angle is set so that the illuminated area per unit time by the second laser emission part, in a case where the number of scans per unit time by the second laser emission part is a predetermined value, may include the illuminated area per unit time by the second laser emission part in a case where the road-surface beam spread angle is equal to the front beam spread angle and where the number of scans per unit time by the second laser emission part is larger than the predetermined value. - View Dependent Claims (6, 7, 8)
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Specification