Production of reflecting mirror

[Detailed Description of the Invention]

[Objects of the Invention] (Field of the Invention) The present invention relates to improvement of the manufacturing method of a reflector. (PRIOR ART) The method of performing direct cutting, grinding, polish, and specular surface coating for a workpiece for manufacturing conventionally the reflector which has an optical specular surface is enforced. By the way, in order for many of reflectors to make concave shape, in a cutting process, Drilling processing is required for them. For this reason, when manufacturing a small reflector by the method mentioned above, Drilling processing becomes difficult in response to the restrictions with a byte size. When the inside diameter is [ length ] the about 2 times in Drilling processing about number 10u, a byte shank becomes thin, rigidity is low, as a result, it loses heart during processing, vibration is generated, and, specifically, processing becomes difficult. The same restrictions are received also in grinding and a polishing process, the shape of a reflector and a size are restrained, and small size and highly precise-ization become difficult by extension. That is, when raising surface coarseness by polish, processing of a hole inside is difficult and receives restrictions also in the shape of a hole inside, and surface coarseness measurement. Since it was necessary to repeat the complicated process which it mentioned above one piece at a time when manufacturing two or more reflectors by the shape of isomorphous, there was a problem which causes the variation in product accuracy and jump-ization of a production cost. (Problem which an invention tends to solve) In the present invention, it was made in order to solve the above-mentioned conventional problem. Therefore, it is going to provide shape for which it asks, and a method of manufacturing a reflector of a size cheaply and in mass production with high precision, without receiving restrictions of shape which arises from a processing process, and a size.

[Elements of the Invention] (Means for solving a problem) In manufacture of a reflector which the present invention carried out A hole to penetrate, and made this hole inside a specular surface, A process of forming Electroformed layer in a metal thin film by which covering formation was carried out at a peripheral face of a base material which makes a hole and the shape of isomorphous of a reflector, and forming back reliance or It is in this Electroformed layer, It is a manufacturing method of a reflector characterized by providing a process of separating Electroformed layer, and back reliance or It is from the base material bordering on the metal thin film with a difference of thermal expansion Bush by giving a rapid temperature change to these reverse side reliance or my formed base material. As the above-mentioned base material, an amber alloy etc. can be used, for example. A metal thin film covered to a peripheral face of the above-mentioned base material acts as exfoliation material at the time of giving a rapid temperature change and exfoliating the above-mentioned Electroformed layer. as this metal thin film -- gold (Au), nickel (Nl), and aluminum Copper (Cu) (A person , silver (Ag), platinum (Pt), etc. can be used.) However, there is 8 hair which chooses those combination so that the quality of the material of these metal thin films and the quality of the material of the above-mentioned Electroformed layer may not become homogeneous. About thickness of a metal thin film, it may be made ten ~ about 1000 persons. The above-mentioned Electroformed layer serves as a reflective surface of a reflector, after dissociating from the above-mentioned metal thin film. As this Electroformed layer, Nl, Cr, an N1-Cr alloy, etc. can be used, for example. As for thickness of Electroformed layer, it is desirable to be referred to as about 11 5 micrometer~30IIII. In advance of formation of Electroformed layer to the above-mentioned metal thin film, unelectrolyzed plating films, such as an electroless nickel plating film, may be formed on the metal thin film in order to improve the reflective characteristic of a reflective surface. It is formed [ whether it is the above-mentioned reverse side reliance and ] by processing of cutting to Is, for example, electroplating, or the usual workpiece, polish, etc. If it is this back reliance, N1 and an amber alloy can be used, for example. the above -- as a means to give a rapid temperature change, a method of immersing a base material in which ■ reverse side reliance or It is was formed in cooling media, such as liquid nitrogen, and cooling it rapidly, and a method of spraying and carrying out the sudden heat of the hot heating gas at the ■ said base material can be adopted, for example. (OPERATION) According to the present invention, since a base material which was processed a hole and the shape of isomorphous of a reflector and was produced is used, it is not necessary to give Drilling processing like before, and can simplify a processing process. In this way, a thing for which a rapid temperature change is given to these reverse side reliance or my formed base material after covering a metal thin film to a peripheral face of a produced base material, forming Electroformed layer in this metal thin film and forming back reliance or It is in this Electroformed layer, Electroformed layer and back reliance which Electroformed layer, and back reliance or It is is separated from a base material bordering on a metal thin film which acts as exfoliation material according to a difference of a thermal expansion coefficient, and serve as a reflective surface -- Or and others -- a reflector can be manufactured. Once it produces this metal thin film covering base material, it will become possible to manufacture even any number of reflectors with little variation in accuracy by the shape of isomorphous using the base material. When not depending back reliance or It is on an electroplating method but producing by machining from a workpiece, it needs to be Drilling processed for forming a hole of approximately truncated cone shape to penetrate. However, in order not to operate this back reliance or an inside of It is as a reflective surface after manufacture of a reflector, accuracy is not required so much of this Drilling processing like the conventional method for manufacturing a reflector from the workpiece itself, but, moreover, it becomes unnecessary [ polish processing to the inside ]. Therefore, a reflector of shape for which it asks, and a size can be manufactured cheaply and in mass production with high precision, without receiving restrictions of shape which arises from a processing process, and a size. (Example of an invention) Hereinafter, an example of the present invention is described with reference to drawings. First, base material l of approximately truncated cone shape reversed to a reflector which should machine cutting, grinding, polish, etc. and should manufacture a workpiece which consists of an amber alloy was produced. It continued and formed golden (Au) thin film 2 of ten thickness in a peripheral face of this base material l by gilding processing (1st [ The ] figure illustration). It pulls, and it continues and produces [ whether it is the back reliance which has a hole of approximately truncated cone shape which Drilling-processes a workpiece which consists of an amber alloy, is ground, and is penetrated, and ] 3, After making [ whether it is this back reliance and ] a hole of 3 in a peripheral face of golden thin film 2 of the base material 1 and having arranged an interval of about three M, nickel Electroforming was given and N1 Electroformed layer 4 of thickness 3IIjI between three insides was formed in golden thin film 2 and back reliance of a base material (2nd [ The ] figure illustration). Subsequently, a place where 3 immersed at base material l unified via Nl Electroformed layer 4 in whether it is back reliance in liquid nitrogen, and cooled it rapidly, Base material l and nickel'jl! 3 was separated [ whether they are Nl Electroformed layer 4 and back reliance and ] from base material 1 by difference of a thermal expansion coefficient with Casting layer 4 bordering on golden thin film 2, and reflective vL5 which consists of nickel Electroformed layer 4 which functions as a reflective surface formed in 3 and its inside in back reliance as shown in Drawing 3 was able to be manufactured. When processing same with having mentioned above using covering base material l of golden thin film 2 in which 3 was separated [ whether they are above-mentioned NI Electroformed layer 4 and back reliance and ] was performed two or more times, multiple reflectors of each other with little variation in accuracy have been manufactured by the shape of isomorphous including an already manufactured reflector. Although a base material was formed with an amber alloy, nickel, back reliance, or It is was formed for Electroformed layer with an amber alloy and a reflector was manufactured by rapid cooling in the above-mentioned example, it is not limited to this. For example, a reflector can be manufactured to □ by forming a base material with an amber alloy, forming nickel, back reliance, or It is for Electroformed layer with a nickel alloy, and carrying out the sudden heat of this as well as an example. Although Au thin film was used in the above-mentioned example as a metal thin film covered to a peripheral face of a base material, even if it uses a thin film of Cu, N1, A A, and Ag5Pt instead of Au8M, the same reflector as an example can be manufactured. However, when N1 thin film was used, Electroformed layer which consists of Cr(s) was used.

Effect Co of [invention Without receiving restrictions of shape which arises from a processing process, and a size according to the present invention, as explained in full detail above, a reflector of shape for which it asks, and a size can be manufactured cheaply and in mass production with high precision, and it has prominent effects -- it can use effective in an optical element etc. -- by extension.

[Brief Description of the Drawings]

1st [ The ] figure~figure 3 is a sectional view showing the manufacturing process of the reflector in the example of the present invention. 1 ... base material, 2 ... a golden thin film and 3 ... It is [ whether it is reverse side reliance and ] 4... nickel Electroformed layer, 5 ... Reflector. Applicant representative Patent attorney Drawing 1 of Takehiko Suzue Drawing 3