Abstract: An optical head comprises a laser holder retaining a laser diode, and a holder support retaining the laser holder, and irradiates an information storage medium with laser light from the laser diode to perform recording/reproduction of information. In this optical head, the laser holder is a frame structure that fixes the laser diode, having an abutment portion protruding from a base side of the frame structure. Also, the holder support has a receiving surface that supports by abutment the abutment portion, and a through-hole that lets pass the laser light. The receiving surface is a plane approximately perpendicular to an optical axis of the optical head, the abutment portion being made as an arc surface having a central axis that passes through an emission point of the laser diode and is perpendicular to the optical axis.

Abstract: A tilt adjustment device K for objective lenses which comprises: a positioning stand 52 for supporting a holder 3 which fixedly holds a first objective lens 1; at least three pins 57a, 57b, and 57c for supporting an inferior surface of an edge of a second objective lens 2 by each tip of the pins; a pin fixedly supporting member 57 for fixedly supporting the ends of the pins; tilt adjusting means for tilting the pin fixedly supporting member 57 so that the second objective lens 2 is tilt-adjusted around a principal point center with respect to an inferior surface of an edge of the first objective lens 1; and a press member 54 for pressing a superior surface of the second objective lens 2, which can be removed after the second objective lens 2 is fixed.

Abstract: A tilt adjustment device K for objective lenses which comprises: a positioning stand 52 for supporting a holder 3 which fixedly holds a first objective lens 1; at least three pins 57a, 57b, and 57c for supporting an inferior surface of an edge of a second objective lens 2 by each tip of the pins; a pin fixedly supporting member 57 for fixedly supporting the ends of the pins; tilt adjusting means for tilting the pin fixedly supporting member 57 so that the second objective lens 2 is tilt-adjusted around a principal point center with respect to an inferior surface of an edge of the first objective lens 1; and a press member 54 for pressing a superior surface of the second objective lens 2, which can be removed after the second objective lens 2 is fixed.

Abstract: In an optical pickup apparatus of the present invention, an integrated optical unit including at least a light emitting element, a light receiving element, and an optical element is installed on a housing. The housing includes arrangement sections on which the respective elements of those at least the light emitting element, the light receiving element, and the optical element are to be rigidly mounted so that the respective elements are integral with the housing via the arrangement sections. In other words, the integrated optical unit is installed on the housing by use of a discrete method so that positional adjustment of respective optical components is simplified. The optical components are adjusted highly precisely in a simplified manner so that optical pickup apparatuses that are small, light, and high-quality are provided.

Abstract: A chuck portion provided to keep a fixed positional relation with respect to a housing, holds a light source unit detachably. This chuck portion is displaced from an advanced position to a retracted position to displace the light source unit which is in a provisional position with respect to the housing, in a direction being away from the housing along a reference axis and the light source unit is retracted from the housing. In a state where the light source unit which is in this position is held by the chuck portion, the light source unit is slid and displaced in a direction crossing the reference axis with respect to the housing, angularly displaced about the reference axis and an axis crossing the reference axis, and then fixed to the housing.

Abstract: An optical head comprises a laser holder retaining a laser diode, and a holder support retaining the laser holder, and irradiates an information storage medium with laser light from the laser diode to perform recording/reproduction of information. In this optical head, the laser holder is a frame structure that fixes the laser diode, having an abutment portion protruding from a base side of the frame structure. Also, the holder support has a receiving surface that supports by abutment the abutment portion, and a through-hole that lets pass the laser light. The receiving surface is a plane approximately perpendicular to an optical axis of the optical head, the abutment portion being made as an arc surface having a central axis that passes through an emission point of the laser diode and is perpendicular to the optical axis.

Abstract: A structure for optical axis adjustment of a laser diode is provided which makes it possible to easily perform optical axis adjustment and inclination adjustment of the optical axis and makes it possible to shorten the operation time necessary for the assembly of the apparatus. The structure for optical axis adjustment includes a housing; a base that is supported so as to be movable along one surface portion of the housing; a laser diode holder that is supported on the base so as to be tiltingly movable and supports a laser diode; and first and second pressing plates that press and movably support the base and the laser diode holder on the housing.

Abstract: A chuck portion provided to keep a fixed positional relation with respect to a housing, holds a light source unit detachably. This chuck portion is displaced from an advanced position to a retracted position to displace the light source unit which is in a provisional position with respect to the housing, in a direction being away from the housing along a reference axis and the light source unit is retracted from the housing. In a state where the light source unit which is in this position is held by the chuck portion, the light source unit is slid and displaced in a direction crossing the reference axis with respect to the housing, angularly displaced about the reference axis and an axis crossing the reference axis, and then fixed to the housing.

Abstract: An optical pickup in which an actuator base is fixed to an actuator base fixing section of a housing is arranged so that a rigid body ball is provided in a gap between a side face of the actuator base fixing section and the actuator base, the rigid body ball pressing both the side face of the actuator base fixing section and the actuator base. With this, it is possible to prevent the relative positions of the actuator base and the actuator base fixing section from being misaligned.

Abstract: The present invention provides an optical pickup device comprises at least:

Abstract: A machine for making an emulsified product from a mixture of a gas and a liquid milk product capable of forming a foam which comprises a fixed whipping barrel, having a substantially labyrinth passage defined therein, and to which the liquid milk product, after having sucked by and mixed with the gas in a suction pump, is supplied under pressure. The liquid milk product mixed with air is emulsified as it flows through the labyrinth passage in the fixed whipping barrel and then supplied towards a rotary whipping barrel having therein a stirring rod rotatable about its longitudinal axis. The emulsified milk product is, during its passage through the rotary whipping barrel, stirred by the rotary stirring rod so that it can be further emulsified to provide a highly homogenized emulsion which is subsequently discharged from a dispenser.