Abstract:
PROBLEM TO BE SOLVED: To solve the problem that a conventional projector apparatus has such constitution that a communication hole on an air intake side of a reflector is identical in size to a communication hole on an air discharge side provided opposite thereto, and cooling air is made to linearly circulate from one communication hole toward the other communication hole, as a result, there is a high air resistance at the communication hole on the air discharge side, and the resistance reduces the speed of the air flow, which results in the problem of low cooling efficiency and difficulty in keeping the life of a light-emitting tube sufficiently long. SOLUTION: A projector apparatus includes: a light-emitting tube 24 emitting illumination light; a reflector 25 covering the periphery of the light-emitting tube and reflecting the illumination light in a forward direction; a cooling fan 6; and an apparatus housing 2. The reflector 25 and the cooling fan 6 are accommodated in the apparatus housing 2. The cooling fan 6 is disposed beside the reflector 25 and sends cooling air to the light-emitting tube 24. The reflector 25 is provided with: an intake port 27 facing an exhaust port 38 of the cooling fan 6; and two discharge ports 28 and 29 made to be opened in a direction perpendicular to the intake port. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To easily manufacture, at a lower cost, an optical element, such as a lens, applicable in imaging apparatus used in various purposes. SOLUTION: In a method for manufacturing a meta-material member 10, first, a plurality of resonance elements 12, each of which has a resonator 1 of a prescribed shape, is produced (step S1). Then, a plurality of spherical microcapsules 20, each of which incorporates one resonator 1, is produced (step S2). Then, the microcapsules 20 are filled into a mold 33 of a prescribed shape together with a prescribed liquefied dielectric material 15 (step S4). Then, the liquefied dielectric material 15 is cured to form the meta-material member 10 (step S6). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an objective lens which prevents blurring of a beam spot by reducing chromatic aberration, and to provide an optical pickup and an optical disk device using the same. SOLUTION: In the objective lens used for the optical pickup for recording and/or reproducing an information signal with an optical beam of roughly 405 nm wavelength on an optical disk, both of the surfaces on an incident side and an outgoing side are aspheric, a numerical aperture is ≥0.8, and the wavelength dependency of the refractive index of material which constitutes the objective lens satisfies predetermined conditions. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain satisfactory optical characteristics by reducing aberration caused by inclination of an optical disk and inclination of an incident light beam. SOLUTION: An optical pickup 6 for recording and/or reproducing information to the optical disk 2 is provided with a light source 41 for emitting a light beam of a prescribed wavelength, an objective lens 27 for focusing the optical beam emitted from the light source 41 on a signal recording face of the optical disk, an inclination means 8 for inclining the objective lens 27, and an optical detector 44 for detecting return light reflected by the optical disk 2. A proportional constant (k) of the inclination of the objective lens 27 based on the optical disk 2 to the inclination of the light beam incident to the objective lens 27 based on the optical disk 2 is within a prescribed range. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To improve productivity, reduce production cost, and improve reliabil ity of a focusing error signal. SOLUTION: An optical pickup device is provided with a 1st diffraction grating 45 for dividing an output light beam emitted from the light reception/ emission integral type element 31 into a zero order light beam and ± 1st order light beams, a 2nd diffraction grating 46 for diffracting the optical path of a returned light beam from an optical disk 2, and a 3rd diffraction grating 47 for diffracting a + 1st order light beam diffracted by the 2nd diffraction grating 46 by being disposed at the location where the 1st order light beam is entered to correct variations in an optical path, wherein the light reception/ emission integral type element 31 is disposed at the location where the - 1st order light beam diffracted by the 3rd diffraction grating 47 is entered and receives the - 1st order light beam to generate a focusing error signal FE and also receives the returned light beams from the optical disk 2 of ± 1st order light beams divided by the 1st diffraction grating 45 to generate a tracking error signal. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To downsize an imaging apparatus for performing image formation and detection while switching between a transmission state and a blocking state of an electromagnetic wave entering an imaging element section.SOLUTION: Provided is an imaging apparatus including: an imaging element section including a plurality of pixels; and an imaging optical system allowing the imaging element section to form an image of an electromagnetic wave from the outside. A transmission/block section which transmits and blocks the electromagnetic wave to/against the imaging element section is disposed at an aperture stop position in the imaging optical system. An actuator drives the transmission/block section to repeatedly move for switching between a transmission state and a blocking state. A differential signal between an output of the pixels in the imaging element section in the transmission state and an output thereof in the blocking state is taken as a captured image signal output.
Abstract:
PROBLEM TO BE SOLVED: To accurately detect a tracking error by making the diffracted light intensity ratio of a wavelength to be subjected to 3-beam division appropriate and increasing laser utilization efficiency in an optical pickup using optical beams of three different wavelengths. SOLUTION: This pickup includes first to third light emitting parts for emitting optical beams of three different wavelengths, a first phase grating part 11a having a first phase height with respect to a reference surface, second phase grating parts 11b having second phase heights with respect to the reference surface on both sides of the first phase grating part thereby having 2-stage phase heights, a diffraction optical element 10 having a diffracted part 10a where optical beams emitted from the first to third light emitting parts are made incident while optical axes are aligned and the first to third optical beams are divided into 3 beams, an objective lens 7 for condensing the emitted optical beams on the signal recording surface of an optical disk 8, and a photodetector 10 for detecting return optical beams reflected on the optical disk 8. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To accurately perform tracking error detection by designing large a diffracted light intensity ratio of a 0th-light and 1st-light of a wavelength by which 3 beam division is performed and improving the use efficiency of a laser. SOLUTION: This apparatus is provided with a light emitting part emitting a plurality of laser beams having different wavelengths, a diffraction grating 4 of a surface relief type having two steps of phase heights by providing a first phase grating 11a and second phase gratings 11b provided to both sides of the first phase grating 11a, dividing a laser beam of one wavelength emitted from the light emitting part 3 into three beams, and transmitting most of laser beams of other wavelengths emitted from the light emitting part 3, an objective lens 7 converging the laser beam emitted from the light emitting part 3 on an optical disk 8, an optical element 9 diffracting an optical path of return light reflected by the optical disk 8, and a light receiving part 10 receiving the return light diffracted by the optical element 9. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To perform comatic aberration correction and astigmatic difference adjustment with a small number of planes, to reduce the number of components and manufacturing processes, and to make an optical system small. SOLUTION: An optical pickup is provided with: a light source 22 for emitting light of a prescribed wavelength; an objective lens 23 for converging an outgoing light emitted from the light source 22 on an optical disk 2 and converging a returned light from the optical disk 2; an optical path dividing means 24 for dividing the optical path of the returned light reflected at the optical disk 2; a photodetector 25 for receiving the returned light divided by the optical path dividing means 24; and an asymmetrical curved surface part 31b in the optical path of the returned light between the optical path dividing means 24 and the photodetector 25. COPYRIGHT: (C)2006,JPO&NCIPI