摘要:
An optical pickup device includes a first laser element that emits first laser light, a second laser element that emits second laser light of which the wavelength is longer than that of the first laser light, an optical path composition element that composes the first laser light and the second laser light to one optical path, a wavelength selective element that acts on the composed first or second laser light; and an objective lens that condenses the first laser light and the second laser light on an optical disk. The magnitude of the power of the wavelength selective element as a lens with respect to the second laser light is larger than the magnitude of the power of the wavelength selective element as a lens with respect to the first laser light. Accordingly, it may be possible to reduce the optical pickup device and the optical disk apparatus in size.
摘要:
An optical pickup device has a first light source and a second light source each adapted for outputting a laser beam of a predetermined wavelength, a photodetector for detecting an intensity of the laser beam outputted from the first light source or the second light source to control the power of the laser beam to be outputted from the first light source or the second light source, a wideband quarter wavelength plate for converting the laser beam outputted from the first light source or the second light source into a circularly polarized laser beam, and a first rise-up mirror and a second rise-up mirror for guiding a P-polarized component in the laser beam converted by the wideband quarter wavelength plate to the photodetector, and guiding an S-polarized component in the laser beam different from the P-polarized component to an optical recording medium. With this arrangement, provided are an optical pickup device and an optical recording medium driving device capable of accurately controlling the power of the light source.
摘要:
An optical pickup device has a first light source and a second light source each adapted for outputting a laser beam of a predetermined wavelength, a photodetector for detecting an intensity of the laser beam outputted from the first light source or the second light source to control the power of the laser beam to be outputted from the first light source or the second light source, a wideband quarter wavelength plate for converting the laser beam outputted from the first light source or the second light source into a circularly polarized laser beam, and a first rise-up mirror and a second rise-up mirror for guiding a P-polarized component in the laser beam converted by the wideband quarter wavelength plate to the photodetector, and guiding an S-polarized component in the laser beam different from the P-polarized component to an optical recording medium. With this arrangement, provided are an optical pickup device and an optical recording medium driving device capable of accurately controlling the power of the light source.
摘要:
An optical pickup apparatus includes a light source emitting a light, an objective lens collecting the light on an optical disk, a collimate lens that is moved in an optical axis direction along a light path of the light to change a divergent angle or a convergent angle of the light, a starting prism that expands a spot shape of an incident light in a first predetermined direction to emit the light, and a beam shaping prism that expands a spot shape of an incident light in a second predetermined direction to emit the light, and the collimate lens, the beam shaping prism, and the starting prism are disposed in order from the light source side toward the objective lens on a light path connecting the light source and the objective lens, and the first predetermined direction is perpendicular to the second predetermined direction. Thereby, it is possible to make an attempt to thin the optical pickup apparatus and an optical disk apparatus using the optical pickup apparatus.
摘要:
A drive plate includes a disk-shaped plate portion; and a tooth-shaped portion formed at an outer peripheral end of the plate portion. The plate portion and the tooth-shaped portion are integrally shaped from a single steel plate material. The plate portion and the tooth-shaped portion include a carburized layer provided over an entire surface layer of the plate portion and the tooth-shaped portion, the carburized layer having a carbon concentration higher than that of a center portion of the plate portion and the tooth-shaped portion in a thickness direction. The carburized layer of the plate portion is higher in hardness than the center portion of the plate portion in the thickness direction. The carburized layer of the tooth-shaped portion has been subjected to a quenching process, and is further higher in hardness than the carburized layer of the plate portion.
摘要:
A manufacturing method and device for a drive plate that make it possible to obtain well-tensioned teeth at a ring gear portion while extending the life of a shaping die. A preferred embodiment provides a manufacturing device including: a compression punch that compresses a side wall portion of a raw material in an axial direction, the raw material including a bottom surface portion and the side wall portion which is cylindrical and provided to extend upright from an outer peripheral end portion of the bottom surface portion. A compression die disposed to face the compression punch in the axial direction and having a toothed shape formed on an inner peripheral surface. The compression punch contacts the compression die, and thereafter the compression die is pushed by the compression punch to form a toothed shape on the side wall portion while moving in the axial direction.
摘要:
The present invention provides a cooling device for rack-type electronic equipment. The rack-type electronic equipment is provided with electronic circuit devices having different heating quantities inside an enclosure, and the cooling device has multiple heat pipes for cooling the rack-type electronic equipment. A condenser unit is provided on the upper surface of the enclosure, an evaporator is provided on the back surface of the enclosure, and each electronic circuit device having a different heating quantity is cooled by means of the heat pipes.
摘要:
Computer readable instructions cause the server to generate, in response to receiving a request, first specific data. The first specific data comprises a first location information for location of first web data configured to display a message screen for specifying new setting information including the first setting information for the communication device. The first specific data is configured to be in a format for transmission using the protocol. The computer readable instructions further cause the server to generate, in response to receiving new setting information, a second specific data. The second specific data comprises second location information for location of second web data configured to display one or more instructions for transmitting the new setting information from the terminal device to the communication device using a short-range wireless communication. The second specific data is configured to be in a format for transmission using the protocol.
摘要:
A main body case containing therein an air blower for circulating ambient air and a heat exchanger for exchanging heat between the ambient air circulated by the air blower and inside air, flange provided in main body case and having wall surface joining surface joined to wall surface where main body case is arranged, and cover attached to flange, having a louver in a side of the inside air, and a plurality of opening holes in a side of the ambient air and covering the ambient air side of main body case, thereby making an attachment and a detachment of cover easy, and achieving a reduction of a maintenance work.
摘要:
A manufacturing method for a toothed member includes a thickened tooth shaping process in which a toothed shape is formed on a side wall portion while making a thickness of the side wall portion larger than a thickness of a bottom surface portion by relatively moving the compression die with respect to the restraint die and the pressure receiving member in the axial direction from the side of the opening end of the cup-shaped raw material toward the bottom surface portion. The manufacturing method being such that the thickened tooth shaping process includes applying a load against the restraint die such that the restraint die restrains the first surface and the second surface.