Abstract: A laser radar includes: a projector configured to project laser light in a direction having an acute angle with respect to a rotation axis; a light receiver configured to condense reflected light of the laser light onto a photodetector; a rotary part to rotate the projector and the light receiver to form an object detection surface having a conical shape; and a controller configured to detect entry of an object into a three-dimensional monitoring region. The object detection surface is set so as to widen toward the monitoring region. The controller sets a detection range corresponding to the monitoring region, on the object detection surface, and detects entry of the object into the monitoring region by a position of the object on the object detection surface, which is detected on the basis of emission of the laser light and reception of the reflected light, being included in the detection range.

Abstract: A laser radar includes: a projection optical system configured to project laser light emitted from a laser light source, to a target region; and a light-receiving optical system configured to condense reflected light that is the laser light reflected by an object existing in the target region, onto a photodetector. The projection optical system and the light-receiving optical system are disposed such that optical axes thereof are separated from each other. The photodetector includes a plurality of sensor portions aligned in a direction perpendicular to a separation direction of these optical axes. The plurality of sensor portions each have a shape that is long in the separation direction of the optical axes.

Abstract: A laser radar includes: a base member; a drive part configured to rotate the base member about a rotation axis; and a plurality of optical units arranged on the base member at a predetermined interval in a circumferential direction about the rotation axis and each configured to project laser light in a direction away from the rotation axis. Here, projection directions of the laser lights from the plurality of optical units are different from each other in a direction parallel to the rotation axis.

Abstract: An object detection device for detecting an object using light includes: a light source configured to emit light; a splitting element configured to split the light emitted from the light source into a plurality of light beams; a mirror configured to reflect the light beams obtained through the splitting by the splitting element; a holder integrally holding the splitting element and the mirror; a drive unit configured to rotate the holder; a photodetector configured to receive reflected light beams, of the respective light beams, reflected from an object; and a condensing lens configured to condense the reflected light beams of the respective light beams onto the photodetector.

Abstract: A mirror driving device includes a rotating shaft, a first driving source, a mirror holder, a mirror, a rotating body, a guide, a moving mechanism, and a second driving source. The first driving source rotates the rotating shaft. The mirror holder is supported on the rotating shaft by a support shaft extending perpendicular to the rotating shaft and is rotatable about the support shaft. A holding part is provided at an edge of the mirror holder. The mirror holder is placed on the rotating body at a position located away from the support shaft. The guide is disposed at the holding part, and guides the holding part so as to be capable of changing a distance between the holding part and the rotating shaft. The moving mechanism moves the rotating body in a direction parallel to the rotating shaft in a state where the rotating body is rotatable with the rotating shaft. The second driving source moves the rotating body via the moving mechanism.

Abstract: The present invention provides a boron diffusion layer forming method capable of sufficiently oxidizing a boron silicide layer formed on a silicon substrate to remove it and obtaining a high-quality boron silicate glass layer. The present invention is a boron diffusion layer forming method of forming a boron diffusion layer on a silicon substrate by a boron diffusion process, the process including a first step of thermally diffusing boron on the silicon substrate and a second step of oxidizing a boron silicide layer formed on the silicon substrate at the first step, wherein the second step has a state at a temperature of 900° C. or higher and a treatment temperature at the first step or lower, for 15 minutes or more.

Abstract: A mirror driving device includes a rotating shaft, a first driving source, a mirror holder, a mirror, a rotating body, a guide, a moving mechanism, and a second driving source. The first driving source rotates the rotating shaft. The mirror holder is supported on the rotating shaft by a support shaft extending perpendicular to the rotating shaft and is rotatable about the support shaft. A holding part is provided at an edge of the mirror holder. The mirror holder is placed on the rotating body at a position located away from the support shaft. The guide is disposed at the holding part, and guides the holding part so as to be capable of changing a distance between the holding part and the rotating shaft. The moving mechanism moves the rotating body in a direction parallel to the rotating shaft in a state where the rotating body is rotatable with the rotating shaft. The second driving source moves the rotating body via the moving mechanism.

Abstract: A method of producing a solar cell, including: a first coating step in which a pre-wet composition is spin-coated on a surface of a semiconductor substrate; a second coating step in which a diffusing material including a solvent and a diffusing agent containing a first impurity element is spin-coated on the surface where the pre-wet composition has been spin-coated, so as to form a coating film of the diffusing agent; and a first impurity diffusion layer forming step in which the semiconductor substrate having the coating film formed thereon is heated, so as to form a first impurity diffusion layer in which the impurity element contained in the diffusing agent is diffused.

Abstract: The present invention provides a boron diffusion layer forming method capable of sufficiently oxidizing a boron silicide layer formed on a silicon substrate to remove it and obtaining a high-quality boron silicate glass layer. The present invention is a boron diffusion layer forming method of forming a boron diffusion layer on a silicon substrate by a boron diffusion process, the process including a first step of thermally diffusing boron on the silicon substrate and a second step of oxidizing a boron silicide layer formed on the silicon substrate at the first step, wherein the second step has a state at a temperature of 900° C. or higher and a treatment temperature at the first step or lower, for 15 minutes or more.

Abstract: [Problem] To provide a solar battery cell such that higher conversion efficiency than ever before is achieved and conversion efficiency of its front surface and conversion efficiency of its rear surface become almost equivalent in a double-sided light-receiving type solar battery cell. [Solution] There is provided a solar battery cell including: an n-type silicon substrate having a thickness of not less than 100 ?m nor more than 250 ?m; a p-type diffusion layer formed on a first light-receiving surface being a front surface of the silicon substrate; an n-type diffusion layer formed on a second light-receiving surface being a rear surface of the silicon substrate; an anti-reflection film formed on the p-type diffusion layer and the n-type diffusion layer; a plurality of grid electrodes and a plurality of busbar electrodes that are formed on part of the p-type diffusion layer; and a plurality of grid electrodes and a plurality of busbar electrodes that are formed on part of the n-type diffusion layer.

Abstract: A method of producing a solar cell, including: a first coating step in which a pre-wet composition is spin-coated on a surface of a semiconductor substrate; a second coating step in which a diffusing material including a solvent and a diffusing agent containing a first impurity element is spin-coated on the surface where the pre-wet composition has been spin-coated, so as to form a coating film of the diffusing agent; and a first impurity diffusion layer forming step in which the semiconductor substrate having the coating film formed thereon is heated, so as to form a first impurity diffusion layer in which the impurity element contained in the diffusing agent is diffused.

Abstract: A lens fixing device includes a lens holder having a lens (lens area) made of a resin, and a mounting portion. The lens holder has two projections. Each of the two projections is formed with a guide surface and a mounted surface. A line of intersection of an extension of the guide surface of the projections and an extension of the mounted surface of the projections in a plane direction is aligned with an optical axis of the lens area. The lens holder is positioned with respect to a plane direction orthogonal to the optical axis by contact of the guide surfaces with receiving surfaces of the mounting portion. The lens holder is fixedly attached by an adhesive.

Abstract: [Problem] To provide a large solar battery cell capable of realizing sufficient conversion efficiency and a method of manufacturing the same. [Solution] There is provided a solar battery cell including: a p-type diffusion layer and an n-type diffusion layer formed on one surface and another surface of a silicon single crystal substrate; one electrode or more formed on part of the p-type diffusion layer; and one electrode or more formed on part of the n-type diffusion layer, wherein: a plurality of high-concentration p-type diffusion regions and low-concentration p-type diffusion regions each located between the high-concentration p-type diffusion regions are formed in the p-type diffusion layer; a plurality of high-concentration n-type diffusion regions and low-concentration n-type diffusion regions each located between the high-concentration n-type diffusion regions are formed in the n-type diffusion layer.

Abstract: A semiconductor laser emits infrared laser light for CD and red laser light for DVD. A collimator lens and a CD/DVD objective lens have optical axes thereof aligned with an optical axis of the infrared laser light. The CD/DVD objective lens is mounted on a holder to be inclined in such a direction as to suppress inherent coma aberration of the CD/DVD objective lens, and to suppress astigmatism generated in the red laser light from a state in parallel to a reference plane of the holder.

Abstract: A lens fixing device includes a lens holder having a lens (lens area) made of a resin, and a mounting portion. The lens holder has two projections. Each of the two projections is formed with a guide surface and a mounted surface. A line of intersection of an extension of the guide surface of the projections and an extension of the mounted surface of the projections in a plane direction is aligned with an optical axis of the lens area. The lens holder is positioned with respect to a plane direction orthogonal to the optical axis by contact of the guide surfaces with receiving surfaces of the mounting portion. The lens holder is fixedly attached by an adhesive.

Abstract: A half-wave plate is attached to a lens holder holding a collimator lens, and a servo operation to the collimator lens and insertion and retraction of the half-wave plate in and from an optical path of a laser beam are performed by a common actuator. When the lens holder is moved to a servo position, the half-wave plate is inserted in and retracted from the optical path of the laser beam. Therefore, the laser beam is formed in S-polarized light or P-polarized light with respect to a polarization beam splitter, and the laser beam is guided to a first objective lens or a second objective lens.

Abstract: A half-wave plate is attached to a lens holder to integrally drive a collimator lens and the half-wave plate. When the lens holder is moved to a servo position, the half-wave plate is inserted in and retracted from an optical path of a laser beam. Therefore, the laser beam is formed in S-polarized light or P-polarized light with respect to a polarization beam splitter, and the laser beam is guided to a first objective lens or a second objective lens.

Abstract: A quarter-wave plate and a polarization beam splitter are used as means for guiding a laser beam to first and second objective lenses. A half of the circularly-polarized laser beam incident to the polarization beam splitter is reflected in the form of an S-polarized light component by the polarization beam splitter and guided to a first objective lens, and the other half is transmitted through the polarization beam splitter in the form of a P-polarized light component and guided to a second objective lens. The whole of light quantity of the laser beam reflected from an optical disk through the first or second objective lens passes substantially through the polarization beam splitter. Therefore, the light quantity of the laser beam guided to a photodetector can be enhanced.

Abstract: A half-wave plate is attached to a lens holder holding a collimator lens, and a servo operation to the collimator lens and insertion and retraction of the half-wave plate in and from an optical path of a laser beam are performed by a common actuator. When the lens holder is moved to a servo position, the half-wave plate is inserted in and retracted from the optical path of the laser beam. Therefore, the laser beam is formed in S-polarized light or P-polarized light with respect to a polarization beam splitter, and the laser beam is guided to a first objective lens or a second objective lens.