Abstract: An autonomous travelling vehicle that autonomously travels based on surrounding information includes an information processing unit that processes surrounding information obtained, a control unit that controls driving of the autonomous travelling vehicle based on the surrounding information, a surrounding information acquisition sensor that obtains surrounding information for the travelling direction of the car body, and a blind area determining unit that determines a blind area around the car body not covered by the surrounding information acquisition sensor. When the autonomous travelling vehicle travels in a blind area at the start of travel, the control unit controls the autonomous travelling vehicle so as to travel at a speed lower than a preset normal speed.

Abstract: An autonomous travelling vehicle that autonomously travels based on surrounding information includes an information processing unit that processes surrounding information obtained, a control unit that controls driving of the autonomous travelling vehicle based on the surrounding information, a surrounding information acquisition sensor that obtains surrounding information for the travelling direction of the car body, and a blind area determining unit that determines a blind area around the car body not covered by the surrounding information acquisition sensor. When the autonomous travelling vehicle travels in a blind area at the start of travel, the control unit controls the autonomous travelling vehicle so as to travel at a speed lower than a preset normal speed.

Abstract: A light-emitting device includes a substrate, a light-emitting element disposed on the substrate, and a sealing member for sealing the light-emitting element. The sealing member contains at least a particulate red phosphor. The red phosphor contains at least a Mn4+-activated fluoride complex phosphor. The sealing member has an upper surface with irregularities on at least part of the upper surface.

Abstract: A light-emitting device includes a substrate, a light-emitting element disposed on the substrate, and a sealing member for sealing the light-emitting element. The sealing member contains at least a particulate red phosphor. The red phosphor contains at least a Mn4+-activated fluoride complex phosphor. The sealing member has an upper surface with irregularities on at least part of the upper surface.

Abstract: Disclosed is a light-emitting device comprising a linear light source (21, 22, and 23) including a linear array of light-emitting elements (21a, 22a, and 23a) on a elongate board (10), the array extending in a direction parallel to a longer side of the board, wherein the light-emitting elements (21a, 22a, and 23a), which constitute the linear light source (21, 22, and 23), are connected in series, a protective element 31, 32, and 33 is connected in parallel with each group of series-connected light-emitting elements, and the protective element (31, 2, and 33) is located on the board (10) and external, with respect to the light-emitting element array direction, to one of the light-emitting elements that is at an end of the array.

Abstract: An optical pickup includes a blue laser source; a red laser source; an infrared laser source; a blue light objective lens focusing blue light emitted from the blue laser source onto an optical storage medium; and a red and infrared light objective lens focusing red light emitted from the red laser source and infrared light emitted from the infrared laser source onto the optical storage medium. The optical pickup contains a blue light startup mirror separating the blue light from the red and infrared light. The blue light startup mirror is disposed along optical paths extending from the blue laser source, the red laser source, and the infrared laser source to the blue light objective lens and the red and infrared light objective lens. The optical pickup also contains a low blue light transmittance plane and low blue light reflectance plane along an optical branch path extending from the blue light startup mirror to the red and infrared light objective lens.

Abstract: There is provided an inexpensive optical pickup device that is capable of accurately detecting light quantities of output laser beams on occasion of at least either of reproduction and recording on an information recording medium. A beam from a first light source 1 which beam does not pass through a wavelength selection film 6 of a light separation element 7 is reflected by a first reflection film 10 in a direction to an optical monitor 5. A beam from a second light source 2 which beam does not pass through the wavelength selection film 6 of the light separation element 7 is reflected by a second reflection film 11 in a direction to the optical monitor 5.

Abstract: An optical pickup includes a blue laser source; a red laser source; an infrared laser source; a blue light objective lens focusing blue light emitted from the blue laser source onto an optical storage medium; and a red and infrared light objective lens focusing red light emitted from the red laser source and infrared light emitted from the infrared laser source onto the optical storage medium. The optical pickup contains a blue light startup mirror separating the blue light from the red and infrared light. The blue light startup mirror is disposed along optical paths extending from the blue laser source, the red laser source, and the infrared laser source to the blue light objective lens and the red and infrared light objective lens. The optical pickup also contains a low blue light transmittance plane and a low blue light reflectance plane along an optical branch path extending from the blue light startup mirror to the red and infrared light objective lens.

Abstract: There is provided an inexpensive optical pickup device that is capable of accurately detecting light quantities of output laser beams on occasion of at least either of reproduction and recording on an information recording medium. A beam from a first light source 1 which beam does not pass through a wavelength selection film 6 of a light separation element 7 is reflected by a first reflection film 10 in a direction to an optical monitor 5. A beam from a second light source 2 which beam does not pass through the wavelength selection film 6 of the light separation element 7 is reflected by a second reflection film 11 in a direction to the optical monitor 5.

Abstract: An optical pickup apparatus is provided with two light sources; an objective lens for focusing light originating from each light source on an optical recording medium; a light separation optical element for transmitting or reflecting the light originating from each light source; a collimator lens for converting the light originating from each light source into a generally parallel beam; an upward-directing mirror for changing the optical path of the light originating from each light source by reflecting it; reflectors disposed between the light separation optical element and the respective light sources, for reflecting parts of light beams emitted from the light sources, respectively; photodetectors for detecting light beams reflected from the reflectors, respectively; and an APC circuit for controlling the power of the light beam emitted from each light source in accordance with a detection output of each photodetector.

Abstract: An optical pickup apparatus and an information recording and reproducing apparatus are provided. When a focused state is obtained on a first light receiving portion corresponding to a first laser beam, a relative position of a sensor lens to the first light receiving portion is regulated so that a first FES becomes zero, and light receiving regions of a second light receiving portion that receives light reflected from an optical recording medium corresponding to a second laser beam are defined so that a second FES outputted from the second light receiving portion becomes zero. Consequently, when the first FES outputted from the first light receiving portion becomes zero, the second FES outputted from the second light receiving portion can also become zero. Consequently, it is possible to prevent occurrence of a focus offset with respect to both one oscillation wavelength and the other oscillation wavelength.

Abstract: In correspondence to a hologram element of a hologram unit, on a light-path between the hologram element and an optical recording medium, a light blocking aperture for blocking, of a laser beam emitted from a light source, unnecessary lights other than an application light applied from the light source to an information recording surface of the optical recording medium and a reflection light reflected by the information recording surface of the optical recording medium and received by a light receiving element is formed. The light blocking aperture is provided with an unnecessary light guiding surface for guiding the unnecessary lights other than the application light and the reflection light in a direction other than a direction of the light receiving element. The unnecessary lights other than the application light and the reflection light can be securely prevented from entering into the light receiving element, and signals can be stably detected.

Abstract: An optical pickup apparatus is provided with two light sources; an objective lens for focusing light originating from each light source on an optical recording medium; a light separation optical element for transmitting or reflecting the light originating from each light source; a collimator lens for converting the light originating from each light source into a generally parallel beam; an upward-directing mirror for changing the optical path of the light originating from each light source by reflecting it; reflectors disposed between the light separation optical element and the respective light sources, for reflecting parts of light beams emitted from the light sources, respectively; photodetectors for detecting light beams reflected from the reflectors, respectively; and an APC circuit for controlling the power of the light beam emitted from each light source in accordance with a detection output of each photodetector.