Abstract:
PROBLEM TO BE SOLVED: To simplify the positioning of a photodetector light-receiving surface or component, to reduce a manufacturing cost, and to enhance reliability. SOLUTION: This device comprises a light source 22 which emits a light of predetermined wavelength, an objective lens 27 which focuses an outgoing light emitted from the light source 22 on an optical disk 2, and which focuses a return light from the optical disk 2, and a beam splitter 25 which splits an optical-path of the return light reflected from the optical disk 2, and which makes the return light of which the optical-path has been split parallel to the outgoing light from the light source 22. Further, the device comprises a composite optical element having a dividing prism 30 which is located at the position where the return light of which the optical-path has been split enters and which spatially divides the return light, and light-receiving sections which obtains a focusing error signal by receiving a plurality of return lights spatially divided by the dividing prism 30, respectively. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide the device capable of eliminating effects due to static electricity in the press forming and producing a good quality optical element. SOLUTION: This device 10 has a glass material receiver 40 for receiving a glass material to be formed, a press section 60 for forming the glass material into a formed body having a prescribed shape; a glass material holder 51 for holding the glass material, a conveyer 50 for conveying the glass material from the glass material receiver 40 to the press section 60, and a forming chamber 11 within which the glass material receiver 40, press section 60, conveyor 50 and glass material holder 51 are placed, wherein the glass material holder 51 consists of an electric conductor and also, is electrically grounded.
Abstract:
PROBLEM TO BE SOLVED: To enable mounting position of a BGA to be ascertained without complicating a manufacturing process by a method, wherein a BGA position recognition line is printed around the BGA through silk printing method. SOLUTION: A BGA 3 is mounted on the front of a board 2, which forms a printed wiring board 1. A large number of solder balls 4 are arranged in an array on the rear of the board 2 and jointed to a land pattern formed on the board 2. A position recognition line 5 is formed on the board 2 surrounding the BGA 3 through silk printing method. The position recognition line 5 has a prescribed width and is formed outside the outer edge of the BGA 3 distant from it by an allowable positional deviation maximum value b. At this point, a width a and an allowable maximum value b are each set at 0.3 mm and 0.2 mm, respectively. With this setup, the peripheral edge of the BGA 3 is observed visually, and it can be decided that the BGA is correctly positioned, when the peripheral edge of the BGA 3 does not overlap with the position recognition line and is located within a range of the position recognition line. However, if a part of the peripheral edge of the BGA 3 overlaps with the position recognition line 5, it is decided that the BGA shifted out of the position, exceeding the allowable value.
Abstract:
PROBLEM TO BE SOLVED: To make it possible to exactly and stably supply the light quantity contributing to recording and reproducing by providing an optical lens with diaphragm forming grooves on an outer peripheral surface toward a direction approximately perpendicular to an optical axis. SOLUTION: A collimator lens 24 is provided with the diaphragm forming grooves 24a over the entire periphery in the direction approximately perpendicular to the optical axis. These two diaphragm forming grooves 24a are formed nearly to a V shape. As a result, the laser beam passing the outer peripheral surface of the optical lens is no longer emitted from the optical lens by the diaphragm forming part. The stray light quantity of the laser beam emitted from the objective lens is thereby suppressed and the exact and stable control of the light quantity passing the objective lens is made possible. The diaphragm forming grooves 24a are formed in such positions where the distance L2 from an incident surface 24c attains D1
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for producing a press-molded glass product without the need of any post-process, i.e., centering process and grinding process and for surely withdrawing the resultant product from the molding die. SOLUTION: This apparatus comprises: a fixed molding die 3 provided with a stationary side die 13 to be butted on a movable molding die and an ejector pin 19 to be inserted into an inserting hole 18 and supported slidably by the stationary die 13; the inserting hole 18 opened at a butting surface (hereinafter, referred to parting surface) 13a butted against the movable molding die; a cavity defined by the movable molding die, the stationary die 13 and the end surface of the ejector pin 19 positioned at the side of the movable molding die; a rod member 26 disposed at the tip end of the ejector pin 19 opposite to the other tip end thereof at the side of the movable molding die; and a movable removing means 28 for removing a glass molded product from the fixed molding die 3 when the movable molding die moves to make both the dies open. Thus, the withdrawing means pushes the solidified molded glass product out of the parting surface of the stationary die toward the movable molding die and withdraws the product from the stationary die.
Abstract:
PROBLEM TO BE SOLVED: To avoid a fault apt to be caused in an adhering process by integrally constituting a lens and a holding body made of synthetic resin material which holds the peripheral part of the lens in a lens bobbin to dispense with the adhering process adhering the lens with respect to the holding body. SOLUTION: A lens 1 and a holding body 2 made of synthetic resin material which holds the peripheral part of the lens 1 are integrally constituted by an insert molding. Material of the lens 1 is made to be material whose heat resistance temp. is higher than the molding temp. of the synthetic resin material making the holding body 2. Then, it is not needed for the lens 1 to provide a part for exclusively positing and holding the lens 1 like a flange part protruded at the peripheral part. Here, a through hole 3 for allowing a luminous flux to be made incident on the lens 1 to pass is formed in the holding body 2. Moreover, the lens 1 is held by the holding body 2 in a state where the outer peripheral part of the lens 1 is entered the inner wall part of the through hole 3 a little and the through hole 3 is closed.
Abstract:
PROBLEM TO BE SOLVED: To eliminate the need for pattern space for precision control. SOLUTION: Marks 6A to 6D are formed in the four corners of a printed circuit board 30. Marks 1 for positioning of the printed circuit board 30 are placed in the center of the marks 6A to 6D. Copper foil patterns 2 in the form of a square loop are formed around the marks 1. Solder resist does not cover the marks 6A to 6D. The space between the copper pattern 2 and the edge of the solder resist 3 is set to a predetermined value. The precision of position of the copper foil patterns can be judged according to the position relation between registration holes 5 and the center of the marks 6A to 6D. The precision of distance between the copper foil patterns can be judged according to the distance between the centers of the four marks. The precision of width of the copper foil pattern is judged according to the measurement of the width of the copper foil pattern 2. The precision of space between the copper foil pattern and the solder resist is judged by measuring the space between the copper foil pattern 2 and the border 3.
Abstract:
PROBLEM TO BE SOLVED: To improve the defect in soldering and to prevent the generation of the expansion and explosion of solid flux in resin core solder. SOLUTION: The device comprises: a guide part 2 of guiding resin core solder 1 obtained by incorporating solid flux 1b into the core of linear solder 1a; and working means 4a, 4b, 4c, 4d of performing working in such a manner that the prescribed part in the resin core solder 1 is easily melted with the heat of a soldering iron 20. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enhance quality of product and serviceability of market by adding arbitrary information unique to a component, as character information, to the basic information of a component read out from the name of the component or an allotted number. SOLUTION: New character information indicative of information unique to a component is added to a basic information of the component, i.e., a symbol indicative of the basic function of the component, such that the character information can be retrieved. The character information is added to the basic information in order to indicate that even an identical component has a different indication depending on the function thereof. Consequently, a larger number of pieces of information can be attained easily. Furthermore, quality of product can be enhanced because corcern of persons pertaining to the work of trial manufacture or production concentrates naturally to an important point.
Abstract:
PURPOSE: To obtain a thin, lightweight optical pickup. CONSTITUTION: The optical pickup comprises a carriage 15 made of synthetic resin for supporting an optical disc 17 movably while facing thereto, a coil exciting member 27 where a magnetic body is embedded in the carriage 15, and a focus driving coil 2 and a tracking drive coil 3 disposed oppositely to the coil exciting member 27. Since the coil exciting part is formed integrally with the carriage, a thin lightweight optical pickup can be realized and the access time can be shortened when the optical pickup is applied to an optical recorder/reproducer.