Patent application number | Description | Published |
20090051997 | LASER RADAR AND BEAM IRRADIATION APPARATUS THEREFOR - A laser radar according to an embodiment of the invention includes a beam irradiation head which emits a laser beam and a control circuit which controls the beam irradiation head to perform scan in a two-dimensional direction with the laser beam. In the laser radar, the beam irradiation head includes a laser beam source; a mirror to which the laser beam emitted from the laser beam source is incident; and a driving mechanism which rotates the mirror in first and second directions about a first rotating axis and a second rotating axis perpendicular to the first rotating axis respectively. The control circuit controls the rotation of the mirror in the first direction and the second direction such that a scan region of the laser beam becomes a rectangular shape. | 02-26-2009 |
20100321751 | MIRROR ACTUATOR AND BEAM IRRADIATION DEVICE - A mirror actuator includes a base block; a first pivot shaft fixedly attached to the base block; a first pivot portion pivotally supported on the first pivot shaft; a second pivot shaft fixedly attached to the first pivot portion and perpendicularly intersecting with the first pivot shaft; a second pivot portion pivotally supported on the second pivot shaft; and a mirror attached to the second pivot portion. In the above arrangement, the first pivot portion and the second pivot portion respectively have a first bearing portion and a second bearing portion for bearing the first pivot shaft and the second pivot shaft at one position. | 12-23-2010 |
20110222064 | OBJECT DETECTING DEVICE AND INFORMATION ACQUIRING DEVICE - An information acquiring device includes a laser light source which emits light in a predetermined wavelength region; a projection lens which projects the light from the laser light source toward a targeted area; an image sensor which receives reflected light reflected from the targeted area to output a signal; and an imaging lens which guides the reflected light to the image sensor; a filter which transmits the light from the laser light source; and an actuator which inclines the filter. A filter controlling circuit inclines the filter in such a direction as to approximate a transmissive wavelength region of the filter to the wavelength region of the light from the laser light source. | 09-15-2011 |
20120326006 | OBJECT DETECTING DEVICE AND INFORMATION ACQUIRING DEVICE - An information acquiring device is provided with a light emitting device, a light receiving device, and a base member on which the light emitting device and the light receiving device are mounted side by side. The light emitting device is provided with a laser light source, a collimator lens, a light separating element which reflects a part of laser light and transmits a part of the laser light, a diffractive optical element which converts the reflected laser light into laser light having a dot pattern, a photodetector which receives the transmitted laser light, and a laser controller which controls a light emission amount of the laser light source based on a detection signal from the photodetector. The laser light source, the collimator lens and the light separating element are linearly arranged, and the diffractive optical element faces a target area. | 12-27-2012 |
20120327223 | OBJECT DETECTING DEVICE AND INFORMATION ACQUIRING DEVICE - An information acquiring device is provided with a light emitting device, a light receiving device, and a base plate having a heat conductivity. The light emitting device has a laser light source, a collimator lens, a diffractive optical element, a mirror which reflects laser light in a direction toward the diffractive optical element, and a housing having a heat conductivity. A side surface of the housing opposite to a reflecting direction of laser light by the mirror is formed into a flat surface, and the housing is mounted on a support plate in such a manner that the flat surface is placed on a top surface of the support plate. Heat generated in the laser light source is efficiently transferred to the support plate via the housing. | 12-27-2012 |
20130002859 | INFORMATION ACQUIRING DEVICE AND OBJECT DETECTING DEVICE - Laser light emitted from a laser light source is converted into light having a dot pattern by a projection optical system for projection onto a target area. The projection optical system is configured such that the density of dots in a peripheral portion of the dot pattern is smaller than that in a center portion of the dot pattern in the target area. A dot pattern captured by irradiating a dot pattern onto a reference plane is divided into segment areas. A distance to each segment area is acquired by matching between dots in each segment area, and a dot pattern acquired by capturing an image of the target area at the time of distance measurement. The segment areas are set such that a segment area in the peripheral portion of the dot pattern is larger than a segment area in the center portion of the dot pattern. | 01-03-2013 |
20130002860 | INFORMATION ACQUIRING DEVICE AND OBJECT DETECTING DEVICE - An information acquiring device is provided with a projection optical system which projects laser light onto a target area with a predetermined dot pattern, and a light receiving optical system which captures an image of the target area. Segment areas are set on a reference dot pattern reflected on a reference plane and captured by the light receiving optical system. A distance to each segment area is acquired by matching between a dot pattern captured at the time of distance measurement and dots in each segment area. The segment area sizes differ depending on regions of the reference dot pattern. | 01-03-2013 |
20130003069 | OBJECT DETECTING DEVICE AND INFORMATION ACQUIRING DEVICE - An information acquiring device has a laser light source which emits laser light of a predetermined wavelength band; a collimator lens which converts the laser light emitted from the laser light source into parallel light; an image sensor which receives reflected light reflected on a target area for outputting a signal; and a CPU which acquires three-dimensional information of an object in the target area based on the signal to be outputted from the image sensor. A light diffractive portion for converting the laser light into laser light having a dot pattern by diffraction is integrally formed on a light exit surface of the collimator lens. | 01-03-2013 |