Abstract: A molding machine includes a fixed mold and a movable mold. The molding machine is a so called micro molding machine which provides less than 150 KN of the mold clamping force for clamping the fixed mold and the movable mold. A positional shift length between both molds is preset at ±20 gm or less. Further, cavities are inserted in base molds of both molds respectively. Furthermore, cores are inserted in the cavities. The position of each cavity is adjustable with respect to each associated base mold. The position of each core is also adjustable with respect to each associated cavity. Moreover, the molding machine can simultaneously mold a plurality of optical components.

Abstract: Taper portions 151 and 161 are provided in the cavity of a stationary side die 110 and the cavity of a movable side die 120 in an injection molding apparatus, respectively, and a floating mechanism 170 is provided so that one taper portions are able to freely follows the other taper portions while die clamping. This configuration makes it possible to correct axial misalignment in each of the cavities.

Abstract: A purpose is to provide an optical component molding apparatus for producing a small-size and high-precision optical component and achieving good transferability and stability of a molded product. A multi-cavity molding machine 100 has a gate 51, a runner 52, and a sprue 53 each having the shape determined to meet conditions (1) to (5): (1) “Miminum gate thickness”/“Maximum runner thickness” is in a range of more than 0.2 to less than 1.0; (2) “Gate length”/“Maximum runner thickness” is in a range of more than 0.4 to less than 4.0; (3) “Outlet diameter of sprue” is in a range of more than 1.0 mm to less than 5.5 mm; (4) “Sprue length” is in a range of more than 10 mm to less than 40 mm; and (5) “Outlet diameter of sprue”/“Inlet diameter of sprue” is in a range of more than 1 to less than 8.

Abstract: A mold assembly that is adapted to clamp fixed mold and movable mold together while making temperature adjustment and inject a molding material into a molding cavity provided therebetween, thereby producing an optical part. The mold assembly is one including fixed platen supporting fixed mold, provided on a part of its mold-side surface with locating hole and including ring of configuration with external and internal surfaces, fitted at its external surface in the locating hole, wherein the fixed mold is provided with a locating projection protruding toward the fixed platen, fitted in the internal surface of the locating hole, and wherein the ring consists of a material whose linear expansion coefficient is smaller than those of the material of the fixed platen and the material of the locating projection.

Abstract: A device to manufacture an optical component, wherein a fixed metal mold 5 and a movable metal mold 6 are clamped to each other while controlling a temperature, and a molding material is injected into the cavity therebetween. In the device, there are disposed electrothermal conversion elements 15 and 25 to control the temperature by electrothermal conversion in response to an electric input, and a medium temperature control section 8 to control the temperature through heat exchange by circulating a heating medium in medium flow paths 16 and 26 in the device from an outside of the device.

Abstract: A die having a plurality of cavities and a temperature sensor for acquiring a temperature value in which the number of the cavities is larger than that of electrothermal conversion elements. When viewed from a direction perpendicular to the surface of a parting line, all cavities and a temperature sensor are arranged in a region occupied by the electrothermal conversion elements. Interval between the outlines of the cavities is smaller than the minimum interval between the outline of the cavity and the electrothermal conversion element, and the shortest distance between the electrothermal conversion element and the temperature measuring portion of a temperature measuring element is shorter than the minimum interval between the outline of the cavity and the electrothermal conversion element.

Abstract: A mold assembly that is adapted to clamp fixed mold and movable mold together while making temperature adjustment and inject a molding material into a molding cavity provided therebetween, thereby producing an optical part. The mold assembly is one including fixed platen supporting fixed mold, provided on a part of its mold-side surface with locating hole and including ring of configuration with external and internal surfaces, fitted at its external surface in the locating hole, wherein the fixed mold is provided with a locating projection protruding toward the fixed platen, fitted in the internal surface of the locating hole, and wherein the ring consists of a material whose linear expansion coefficient is smaller than those of the material of the fixed platen and the material of the locating projection.

Abstract: In the case where a lens unit where two ore more transparent resin lenses are combined is constituted, at least one transparent resin lens contains infrared absorbent. When the lens unit is assembled, an infrared laser is emitted to a joined portion between the transparent resin lens and the other transparent resin lens. As a result, the emitted infrared ray is absorbed by the infrared absorbent, so that the transparent resin lenses are welded to each other. An opaque lens barrel which holds the entire lens unit and the transparent resin lenses are joined by welding.

Abstract: An apparatus for molding optical components of a small size and high precision is provided with good transferability and a reduced production cycle. This apparatus includes a plurality of runners arranged in a pattern allowing multi-cavity molding for molding plastic lenses each having an outer diameter of 2 mm to 12 mm and surface roughness Ra of 20 nm or less. The total projected area of the runners is determined within a range of 1 cm2 to 12 cm2. The runners are arranged to extend around a sprue in directions perpendicular to an outer surface of the base molds. The pattern of the runners extending from the junction with the sprue to each shape transfer section is configured in two intersecting directions. A cavity is of a rectangular outer shape when seen from a pressure contact surface side.

Abstract: An injection molding comprises: a fixed mold; a movable mold which is capable of contacting to and separating from the fixed mold; and an injection unit which supplies molten resin to a space formed between the fixed mold and the movable mold when being pressed to a non-molding face of the fixed mold. The injection unit comprises: a nozzle portion which injects molten resin to the space formed between the molds; an injecting portion which applies molten resin pressure toward the space formed between the fixed mold and the movable mold though the nozzle portion; a heater and a temperature sensor provided on the nozzle portion; and a heater and a temperature sensor provided on the injecting portion, and detection accuracy of the sensor of the nozzle portion is higher than that of the injecting potion. There is thus provided an injection molding machine capable of manufacturing optics with high accuracy without considerable cost-up by realizing stable and highly accurate injection.

Abstract: A resin material molding method includes: equalizing flow speeds of a first resin material and a second rein material at a confluence of the resin materials when the first material and the second resin material are fed into a common cavity through different inlets, the cavity including a first mold and a second mold.

Abstract: An apparatus for molding optical components of a small size and high precision is provided with good transferability and a reduced production cycle. This apparatus includes a plurality of runners arranged in a pattern allowing multi-cavity molding for molding plastic lenses each having an outer diameter of 2 mm to 12 mm and surface roughness Ra of 20 nm or less. The projected area of the entire runner is determined within a range of 1 cm2 to 12 cm2. The runners are arranged to extend around a sprue in directions perpendicular to an outer surface of the base molds. The pattern of the runners extending from the junction with the sprue to each shape transfer section is configured in two intersecting directions. A cavity is of a rectangular outer shape when seen from a pressure contact surface side.

Abstract: A purpose is to provide an optical component molding apparatus for producing a small-size and high-precision optical component and achieving good transferability and stability of a molded product. A multi-cavity molding machine 100 has a gate 51, a runner 52, and a sprue 53 each having the shape determined to meet conditions (1) to (5): (1) “Miminum gate thickness”/“Maximum runner thickness” is in a range of more than 0.2 to less than 1.0; (2) “Gate length”/“Maximum runner thickness” is in a range of more than 0.4 to less than 4.0; (3) “Outlet diameter of sprue” is in a range of more than 1.0 mm to less than 5.5 mm; (4) “Sprue length” is in a range of more than 10 mm to less than 40 mm; and (5) “Outlet diameter of sprue”/“Inlet diameter of sprue” is in a range of more than 1 to less than 8.

Abstract: A molding machine includes a fixed mold and a movable mold. The molding machine is a so-called micro-molding machine which provides less than 1.5 KN of the mold clamping force for clamping the fixed mold and the movable mold. A positional shift length between both molds is preset at ±20 ?m or less. Further, cavities are inserted in base molds of both molds respectively. Furthermore, cores are inserted in the cavities. The position of each cavity is adjustable with respect to each associated base mold. The position of each core is also adjustable with respect to each associated cavity. Moreover, the molding machine can simultaneously mold a plurality of optical components.

Abstract: In the case where a lens unit where two ore more transparent resin lenses are combined is constituted, at least one transparent resin lens contains infrared absorbent. When the lens unit is assembled, an infrared laser is emitted to a joined portion between the transparent resin lens and the other transparent resin lens. As a result, the emitted infrared ray is absorbed by the infrared absorbent, so that the transparent resin lenses are welded to each other. An opaque lens barrel which holds the entire lens unit and the transparent resin lenses are joined by welding.

Abstract: A video signal transmission apparatus has the encoding means 2, operative when a predetermined unit of video signal is compressively encoded, for multiplexing identification data unique to this video signal in a user data region within an encoded bit stream, and the storing/decoding means 4 for storing the encoded bit stream data having the unique identification data multiplexed therein, and, when transmission is requested from the outside, for decoding the encoded bit stream data and simultaneously reading the multiplexed unique identification data to verify whether it is unique identification data of a video signal to be transmitted.

Abstract: The present invention relates to a moving picture searching apparatus, where moving picture information recorded can be searched easily when desired moving picture information is picked out. Of single or plural moving picture(s) S2 recorded in predetermined recording medium, moving picture information which meets the condition designated by a user and obtained based on output S1 of input means 2 are searched based on respective index information which has been recorded in the recording medium 6 with respective corresponding moving picture information. On the other hand, after this, when it is confirmed on the basis of the output S1 of the input means that the user designated first operation mode, respective moving picture information S2 picked out by the search are sequentially reproduced at a predetermined timing and displayed on display means 4.

Abstract: A vehicle window glass assembly comprises a window glass and a plurality of parallel, electric heating strips disposed on the window glass. The distance between adjacent two of the heating strips at least at portions thereof disposed in a central region of the window glass being in the range of 20 to 28 mm so that a quantity of heat generated by the heating strips per unit area can be smaller, i.e., 0.80 to 0.95 times of a reference electric power or a supply power for the heating strips can be 0.80 to 0.95 times of a reference electric power. The reference electric power is a power necessary for causing a surface temperature of a comparable window glass with comparable heating s trips to rise up to 90% of an equilibrium temperature in the range of 35 to 45.degree. C.

Abstract: A video signal is supplied from a digital VTR 1 and is encoded by an MPEG encoder 8. The encoded video signal is recorded as a compressed video signal in an HDD 9. A plurality of compressed video signals are recorded in the HDD 9 and addresses of the compressed video signals are stored in a controller 6. MPEG decoders 12 and 14 decode the compressed video signals which are read out from the HDD 9. After a video signal processing apparatus 3 executes an editing process on the decoded video signals, a synthesized video signal is supplied to a digital VTR 10 through a switch 7. The synthesized video signal recorded in the digital VTR 10 is supplied to the video signal processing apparatus 3 for further processing through a switch 13 without being decoded.

Abstract: A still image signal output apparatus connected to at least one still image filing apparatus is comprised of a first memory for storing a data signal representative of a transmission sequence of the still image signal, a second memory having at least a pair of frame memories each for storing one frame of the still image signal in accordance with the data signal, a third memory for storing a plurality of frames of the still image signal in accordance with the data signal, a processor circuit for controlling a supply of the still image signal stored in the third memory to the second memory and the still image signal stored in the still image filing apparatus to the third memory in accordance with the data signal when a still image signal stored in the second memory is output therefrom.