Method for machining optical element forming mould
A mold and electroforming technology, which is applied to optical components, household appliances, and other household appliances, etc., can solve problems such as loosening of screws due to temperature cycle changes, deformation of molds or supports, and influence of microscopic patterns on optical properties, etc.
Inactive Publication Date: 2003-12-03
KONICA CORP
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Problems solved by technology
However, when connecting molds and supports with screws, there is concern about the loosening of the screws due to temperature cycles caused by the molding process or the influence of force that occurs repeatedly during long-term use of the screws
On the other hand, if an adhesive is used to bond the mold to the support, there is concern that sufficient adhesive strength cannot be maintained in the high temperature environment during the molding process
Furthermore, if thermal spraying is used to connect the mold and support, the concern is that the temperature during thermal spraying may cause deformation of the mold or support
Moreover, if a low melting point alloy is used and the solder joints are solidified to connect the mold and the support, if the alloy has a high melting point, there is concern that the mold or the support may be deformed by the influence of the molten alloy at high temperature, and if the alloy has a low melting point, in The high temperature environment during the molding process does not ensure sufficient bond strength of the alloy
Especially in the case of molds with microscopic patterns, the problem of the above-mentioned connection method is even more serious
When such optical components are finally fabricated, the optical properties resulting from microscopic patterns can be severely affected
[0005] Although Japanese TOKKAI No. 2001-217099 discloses a method of connecting two parts by electroforming to manufacture an accelerator resonator cavity, it does not describe a method of positioning the two parts before electroforming
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[0039] Hereinafter, specific embodiments of the method for manufacturing the molding die of the optical element of the present invention will be described in detail. Each of the drawings in Fig. 1(a) to Fig. 1(f) is a schematic diagram, and they show the process of processing a mold by electroforming. First, a substrate 1 made of silicon and having a microscopic pattern is made by mechanical, chemical, or physical processes, and as shown in Figure 1(a), the substrate is connected to one end surface of the fixture 2 with screws 3 . In this case, the end surface 2a of the clamp 2 appears to be exactly perpendicular to the axis X of the clamp 2. Then, in order to make the substrate conductive and increase the surface hardness, a layer of phosphorus-containing nickel film used as a mold is formed on the surface of the substrate 1 by a sputtering method, and the function of the film is to protect the microscopic pattern.
[0040] Next, in FIG. 1(b), an electroforming mold of pure nicke...
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A method of producing a die for forming an optical element including; a positioning step to fix temporarily under the state wherein a plurality of members at least one of which has a die transfer surface are positioned with their connection surfaces being put to face each other, and an electroforming connection step to connect both members by forming an electroforming mold on a circumference of the connection surface under the state where the plural members are positioned.
Description
Technical field [0001] The present invention relates to a method for processing an optical element molding die capable of molding the optical surface of an optical element. Specifically, the present invention relates to a method for processing an optical element molding die, which is used when forming a mold with multiple parts. , Can accurately connect these components. Background technique [0002] In recent years, an optical element such as an ultra-precision objective lens is often used in the rapidly developing field of optical pickups. In addition, optical elements with microscopic patterns such as diffraction gratings have been developed. When the mold is used to process optical components such as plastic or glass, products with uniform shapes can be quickly processed, so the method of molding components with molds is suitable for mass production. [0003] In addition, in many cases, for example, a single crystal diamond tool is used to divide the mold into one after anoth...
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IPC IPC(8): B29D11/00
CPCB29D11/00432
Inventor 茜部佑一水越智秀
Owner KONICA CORP