JP2006290692A - Method of forming beam reshaping element, and beam reshaping element manufactured by the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of forming a beam reshaping element having high eccentric precision, and to provide the beam reshaping element manufactured by the method. <P>SOLUTION: In the method of manufacturing the beam reshaping element having cylindrical both surfaces or cylindrical one surface and anamorphic another surface and a rectangular or circular outside shape, the beam reshaping element is manufactured by using a set of a metal mold for forming each surface and forming a glass base material in a rectangular hole of a member with the rectangular hole or a circular hole of a member with the circular hole which forms the side surface of the element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of forming a beam shaping element that converts elliptical output light such as a blue laser diode (LD) into a circle, and a beam shaping element manufactured by the method.

  In general, the light source used in the pickup optical system is an LD, and its emission beam is an elliptical divergent beam. When this diverging beam is converged by the objective lens as it is, the beam is irradiated only to the negative portion of the circular recording area or to the outside of the recording area, and the accuracy of recording and reproduction decreases. Therefore, it is necessary to perform beam shaping so that the cross section on the recording medium is circular.

  Particularly in recent years, blue semiconductor lasers have been used as light sources, but the accuracy required for recording / reproducing signals has become stricter due to the shorter wavelength. However, the output of the blue laser is currently weak, and sufficient laser power for recording / reproducing with high accuracy cannot be secured. In order to solve this problem, it is necessary to increase the efficiency of laser use by shaping the elliptical beam cross-section from the LD into a circular beam cross-section, and beam shaping technology for that purpose has become very important. Yes.

  Beam shaping is usually performed by a beam shaping element. As a result, the divergent beam can be directly shaped, and a beam having a substantially circular cross section can be created with almost no aberration. As such an element, a beam shaping element with a double-sided cylindrical surface (Patent Document 1) or a beam shaping element with a single-sided cylindrical surface and an anamorphic surface on the other side has been proposed.

  Such a beam shaping element is required to have high eccentricity accuracy between the buses of each cylindrical surface (about 1 to 10 μm for parallel eccentricity, about 1 to 10 minutes for tilt eccentricity).

In addition, the beam shaping element as described above requires high-precision alignment work when the pickup is incorporated, and the adjustment method is very difficult (about 1 to 10 μm for parallel eccentricity and 1 to 5 minutes for inclination eccentricity). level).
JP 2002-208159 A

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for forming a beam shaping element having high accuracy in eccentricity and a beam shaping element manufactured by the method.

  The present invention is a method of manufacturing a beam shaping element in which both surfaces are cylindrical surfaces, or one surface is a cylindrical surface and the other surface is an anamorphic surface, and the outer shape is a square or round shape. Beam shaping, characterized in that a glass material is formed in a square hole of a member with a square hole forming a side surface of the element or in a round hole of a member with a round hole by using a pair of molds The present invention relates to a method for manufacturing an element.

  FIG. 1 shows an example of a schematic cross-sectional view of a set of upper and lower molds used when producing a beam shaping element having a double-sided cylindrical surface.

  The upper die has a cylindrical surface (HIJKG) 4 formed on the die base material 3, and the die cross section is a rectangle EFGH having a rectangle ABCD and a side EF having a length equal to or less than the length of the side CD, It consists of a cylindrical cross section IJK formed on the side HG. The cylindrical cross section has a convex shape in FIG. 1 and includes an arc surface or a non-arc surface.

  In the present invention, a direction perpendicular to the paper surface on which the mold cross section of FIG. 1 is described is defined as a “bus line direction”, and a direction perpendicular to the bus line, for example, a direction parallel to the side AB is defined as a “child line direction”. Define. In the present invention, “parallel” or “vertical” is used as a concept represented by “substantially parallel” or “substantially vertical”, respectively. In this specification, “substantially” is 60 minutes (one degree). ) Means the following:

  The upper mold 1 has a thickness obtained by stacking the above-mentioned mold cross sections in the generatrix direction. Further, the surface in the generatrix direction including the side HG having the cylindrical cross section IJK is the cylindrical surface (surface) of the upper mold.

  The upper mold used in the present invention has a line (referred to as “upper mold bus bar”) in which the intersection of the non-arc axis or the arc center axis and the cylindrical section IJK is connected in the bus bar direction. It is preferable to have a cylindrical surface processed so that the bus bar is positioned at the center of the mold cross section (center of the cylindrical surface). The “non-arc axis” is defined by a non-arc-shaped line-symmetrical center line defined by an aspheric formula and an aspheric coefficient, and the “arc center axis” is the arc machining area of the mold. It is defined by vertical bisectors at both ends (I and K in FIG. 1).

  The lower mold 2 has a molding surface (hijkg) formed on a mold base material, and a cross section of the lower mold 2 is on a rectangle efgh having sides ef less than the length of the rectangle abcd and the side cd, on the side hg. It consists of the cylindrical section ijk formed in. The cylindrical cross section has a concave shape in FIG. 1 and includes an arc surface or a non-arc surface.

  The lower mold has a thickness obtained by stacking the above-mentioned mold cross-sections in the generatrix direction. Further, the plane in the generatrix direction including the side hg having the cylindrical section ijk is the cylindrical surface (surface) of the lower mold.

  The lower mold used in the present invention has a line (referred to as a “lower mold bus bar”) in which the intersection of the non-arc axis or the arc central axis and the cylindrical section ijk is connected in the bus line direction. It has a cylindrical surface processed so as to be located at the center of the cylindrical surface.

  FIG. 2 shows a schematic perspective view of a beam shaping element having a cylindrical surface on one side and an anamorphic surface on the other side. In the figure, the X-axis direction corresponds to the sub-wire direction in the present invention, and the Y-axis direction corresponds to the bus-line direction in the present invention. An anamorphic surface having different curvatures and aspherical coefficients in the X-axis direction and the Y-axis direction is formed on the XY plane. The anamorphic surface has a long axis yy ′ as the Y-axis and a short anamorphic surface. The axis xx ′ is made coincident with the X axis.

  When producing a beam shaping element having an anamorphic surface on one side as shown in FIG. 2, the lower mold shown in FIG. 1 has a shape having an anamorphic surface as described above on the mold surface. Yes. Then, the mold surface is processed so that the long axis of the anamorphic surface coincides with the lower mold bus.

  In the present invention, both the upper and lower molds are made of a general material used for a glass lens mold, such as cemented carbide, cermet, SiC, and stainless steel plated with Ni. Composed. In addition, the cylindrical surface and the anamorphic surface are surfaces obtained by subjecting a molding surface to desired mirror surface processing, for example, grinding processing, which has been conventionally known. However, from the gist of the present invention, a configuration using the mold base material and the mold produced by the processing method described herein is also included in the present invention.

  In the above description, a rectangular parallelepiped mold as illustrated in FIG. 3 has been described as an example, but a cylindrical mold as illustrated in FIG. 4 can also be used in the present invention. In the following, the term “size around the neck” is used. In the case of the rectangular mold shown in FIG. 3, the length 31 of the side in the subwire direction 33 of the mold surface square or the length of the side in the busbar direction is used. In the case of the cylindrical type mold shown in FIG. 4, the diameter 41 of the mold surface is circular.

  FIG. 5 shows a perspective view of an example of a member with a square hole forming the four side surfaces of the element. The member with a square hole shown in FIG. 5 is an integral body in which a rectangular column cavity (square hole) is formed in a rectangular column. The outer periphery may have other shapes such as a circle in addition to the rectangular shape shown in FIG.

  The member with a square hole is made of carbide or the like, and the surface of the square hole is reflected in the surface roughness of the side surface of the shaped beam shaping element and the square of the shaped beam shaping element. In consideration of easiness of taking out from the hole member, it is preferable that the maximum height Ry is processed to be 0.02 μm or less.

  When forming a beam shaping element using a member with a square hole, as shown in FIG. 6, a member with a square hole is attached around the neck of a lower mold (sometimes simply referred to as “lower mold”). And a step of inserting an upper mold (sometimes simply referred to as “upper mold”) into the square hole by the automatic operation. Alternatively, as shown in FIG. 7, a step of attaching a member with a square hole around the neck of the upper die and inserting the lower die into the square hole by an automatic operation of the molding machine is included.

  A case will be described in which a member 61 with a square hole is attached around the neck of the lower die 62 as shown in FIG. 6 and the upper die 63 is inserted into the square hole by an automatic operation of the molding machine.

  The size of the square hole is preferably configured to be 10 to 50 μm larger in both length and width than the size around the neck of the lower mold when compared at room temperature. If the value is too small, it is difficult to attach a member with a hole to the mold, and the mold may be damaged. If the value is too large, the glass protrudes between the holed member and the mold when the glass material 64 is molded, and an appearance defect occurs at the edge of the molded product.

  The size of the upper mold around the neck is preferably configured to be smaller by 10 to 200 μm both vertically and horizontally than the size of the lower mold around the neck when compared at room temperature. If the upper mold is too large, when the upper mold enters the square hole in the automatic operation of the molding machine, the upper mold and the square hole may collide and the upper mold may be damaged. If the upper mold is too small, the glass protrudes between the holed member and the mold, resulting in poor appearance at the edge of the molded product.

  The step of fitting the square hole in the lower mold may be performed manually or by an automatic operation of a molding machine. After fitting the square hole in the lower mold, the glass material is put into the square hole and placed on the lower mold by automatic operation or manual operation of the molding machine. As the glass material, various glass materials such as crown lanthanum silica glass, flint lead silica glass, titanium silica glass and the like can be used. The glass material may be a preform having an approximate shape of a molded product used in a general reheating molding method, or may be in a softened state by a so-called dropping method (droplet method).

  Various conditions such as upper and lower molds, square holed members, and their sizes other than those described above are the size of the target molded product, the shape of the cylindrical surface and anamorphic surface, and the flatness of the required side surface. What is necessary is just to set suitably by etc. Further, various molding conditions (temperature, pressure, volume, process order) and the like of the glass material may be appropriately set according to a conventional reheating method, a so-called dropping method (droplet method) or the like.

  Next, the upper mold 63 is inserted into the member 61 with a square hole by the automatic operation of the molding machine. Thereafter, the relative distance between the upper mold 63 and the lower mold 62 is reduced, and the glass material 64 is molded. “The upper mold has been inserted into the square hole” means that the mold surface edge portion has entered the square hole.

Preferably, the molding machine is provided with a mechanism capable of adjusting (eccentric adjustment) relative parallel eccentricity and inclination eccentricity between the upper mold and the lower mold. As shown in FIG. 8, the parallel eccentricity adjustment is performed in the x-axis direction and the y-axis direction, and the inclination eccentricity adjustment is performed around the x-axis, the y-axis, and / or the z-axis. Examples of components that can constitute these eccentricity adjustment mechanisms include piezo stages and micrometers (high-precision products).
The procedure for adjusting parallel eccentricity and tilt eccentricity will be described. First, the amount of parallel eccentricity and the amount of tilt eccentricity of the beam shaping element obtained by shaping are measured by using a three-dimensional shape measuring device or calculated by analyzing the measurement result of transmitted wavefront accuracy. Based on the parallel eccentricity amount and the inclination eccentricity amount, each parallel eccentricity and inclination eccentricity adjustment shaft provided to the molding machine is automatically or manually operated in a state where the automatic operation of the molding machine is stopped. In such a state, molding is resumed, and the parallel eccentricity and tilt eccentricity of the obtained beam shaping element are measured, and the adjusting shaft of the molding machine is operated in the same manner as described above. By repeating this procedure, it becomes possible to obtain a beam shaping element in which parallel eccentricity and inclination eccentricity are kept within a predetermined tolerance.

  When the upper mold is inserted into a square hole of a member with a square hole, as shown in FIG. 9, it is preferable that the upper periphery of the square hole member 90 be chamfered 91. By doing so, the upper mold can be inserted into the square hole more smoothly by avoiding a collision with the upper mold square hole member. In addition, when the upper and lower molds are moved relatively to adjust the eccentricity, as shown in FIG. 9, the mold is inserted only in the chamfered part, or the adjustment is performed after that. The risk of collision between the member and the mold is reduced, which is safe. When the periphery of the upper part of the square hole is chamfered, as shown in FIG. 9, the state where the mold surface edge part enters the chamfered part also means the state where the upper mold is inserted into the square hole. .

Hereinafter, a case will be described in which a member with a square hole is attached around the neck of the upper mold as shown in FIG. 7 and then the lower mold is inserted into the square hole.
The size of the square hole is preferably configured to be 10 to 50 μm larger in both length and width than the size around the neck of the upper mold when compared at room temperature. If the value is too small, it is difficult to attach a member with a hole to the mold, and the mold may be damaged. If the value is too large, the glass protrudes between the holed member and the mold at the time of molding the glass material, resulting in poor appearance at the edge of the molded product.

  The size around the neck of the lower mold is preferably configured to be smaller by 10 to 200 μm both vertically and horizontally than the size around the neck of the upper mold when compared at room temperature. If the lower mold is too large, when the lower mold enters the square hole in the automatic operation of the molding machine, the lower mold and the square hole may collide and the lower mold may be damaged. If the lower mold is too small, the glass protrudes between the holed member and the mold, resulting in poor appearance at the edge of the molded product.

  The step of fitting the square hole in the upper mold may be performed manually or by an automatic operation of a molding machine. After the upper mold is fitted into the square hole, the glass material is put into the square hole and placed on the lower mold by automatic operation or manual operation of the molding machine. Various glass materials such as crown lanthanum silica glass, flint lead silica glass and titanium silica glass can be used as the glass material. The glass material may be a preform having an approximate shape of a molded product used in a general reheating molding method, or may be in a softened state by a so-called dropping method (droplet method).

  Next, the lower mold 72 is inserted into the member 71 with a square hole by an automatic operation of the molding machine. Thereafter, the relative distance between the upper mold 73 and the lower mold 72 is reduced, and the glass material 74 is molded. “The lower die has been inserted into the square hole” means that the mold surface edge portion has entered the square hole.

  In the same manner as described in FIG. 8, a mechanism capable of adjusting (eccentric adjustment) the relative parallel eccentricity and inclination eccentricity between the upper die and the lower die is added to the molding machine, and the eccentricity is adjusted to perform glass molding. It is preferable to do. Moreover, it is preferable to make it the structure which chamfered the square hole entrance periphery of the member with a square hole of the side by which a lower mold | type is inserted similarly to FIG.

  10 and 11 show a member with a square hole made up of a plurality of members instead of the member with a square hole as an integral body shown in FIG. FIG. 10 shows a member with a square hole in which the square hole 51 is configured by the two members 91 and 92, and FIG. 11 shows a member with a square hole in which the square hole 51 is configured by the four members 93 to 96. In this way, when a member with a square hole is configured with a plurality of members, it becomes possible to polish the surface that comes into contact with the molded product of the square hole, so that compared to the case of using a single-piece square hole member The surface roughness of the side surface of the product can be improved.

  Both FIG. 10 and FIG. 11 show an aspect in which a square hole is formed in a square pole, but as long as the square hole 51 is formed, the outer periphery may have a circular shape or the like.

  Using such a member with a square hole, as shown in FIG. 6, the step of attaching a member with a square hole around the neck of the lower die and then inserting the upper die into the square hole, as shown in FIG. In addition, a glass element can be molded through a process of attaching a member with a square hole around the neck of the upper mold and then inserting the lower mold into the square hole. The size of the square hole formed by closely contacting a plurality of members is preferably slightly smaller than the size around the neck of the mold to be fitted at the molding temperature (about 500 ° C.). Specifically, at a molding temperature (about 500 ° C.), a gap of about 5 to 50 μm is preferably generated between a plurality of members forming the square holes.

  The size of the upper mold around the neck is preferably configured to be smaller by 10 to 200 μm both vertically and horizontally than the size of the lower mold around the neck when compared at room temperature. If the upper mold is too large, when the upper mold enters the square hole, the upper mold may collide with the square hole and the upper mold may be damaged. If the upper mold is too small, the glass protrudes between the holed member and the mold, resulting in poor appearance at the edge of the molded product.

  An example of a method of attaching a member with a square hole made of a plurality of members to a mold will be described with reference to FIG. FIG. 12 is a view for explaining a method for attaching a member with a square hole, in which the square hole 51 is configured by the four members 93 to 96 as shown in FIG. 11, to a mold. A member with a square hole (a plurality of members 93 to 96) is placed in the reference frame 121, and a member having a larger coefficient of thermal expansion than the reference frame and the plurality of members ("clamping") is provided between the reference frame 121 and the plurality of members. It is the structure which inserts 122,123). It is preferable to keep the reference frame, the fastening member, and the contact surfaces of the plurality of members as small as possible at room temperature. The reference frame, the fastening member, and the member with the square hole are fixed and attached to the mold using the fact that the thermal expansion coefficient of the fastening member is larger than that of the reference frame and the plurality of members. . For example, when the reference frame 121 and the plurality of members 93 to 96 are made of carbide and the fastening members 122 and 123 are made of stainless steel having a higher coefficient of thermal expansion than that, the members of the reference frame and the fastening member at room temperature. A configuration in which a gap is formed between them is possible, the assembly of the reference frame, the fastening member, and the plurality of members is facilitated, and the plurality of members 93 to 96 can be connected via the fastening members 122 and 123 by raising the environmental temperature. It will be fixed to the frame. At the molding temperature (such as 700 ° C.), the gap between the plurality of members has a minimum value of 5 to 50 μm.

  When a member with a square hole composed of a plurality of members is used and the method of attaching a member with a square hole as shown in FIG. 12 is adopted, the member with a square hole around the neck of the lower mold 124 as shown in FIG. It is preferable to set a procedure in which 121 is attached and a glass material is automatically or manually placed on the lower die, and then the upper die 123 is manually attached to the square hole.

  When the step of attaching a member having a square hole to the upper and lower molds as shown in FIG. 13 is adopted, the size of the upper mold around the neck is substantially the same as the size of the lower mold around the neck (± 5 μm). It is good. By doing so, for example, when manufacturing a beam shaping element of a double-sided cylinder, the distance from the surface where the member with a square hole in the mold child wire direction hits to the bus bar of the cylinder surface of each die is the specified value (the child wire direction If the parallel eccentricity tolerance is within 10 μm, it is not necessary to use an adjustment mechanism for parallel eccentricity in the subwire direction. The same applies to the eccentricity about the z-axis, the eccentricity about the y-axis, the eccentricity about the x-axis, and the eccentricity parallel to the bus line. If all the eccentric components can be molded without adjustment, the molding preparation time can be greatly shortened and the performance of the molded product can be stabilized.

  As another method of attaching a square hole member composed of a plurality of members to a mold, a mechanism for screwing the square hole member by using a fixing member and a fastening member (hereinafter simply referred to as “screw fastening attachment method”). ). This method will be described with reference to FIGS.

  The member with a square hole used in the screw tightening attachment method has a circular outer shape of the member with a square hole made up of two members shown in FIG. 10, and further has a cross-section curved skirt portion 141 as shown in FIG. It is good to use what is a shape. Here, two members constituting the member with a square hole are indicated by 142 and 143.

  As shown in FIG. 15, the two members 142 and 143 constituting the member with the square hole are attached around the neck of the die, the die fixing member 144 is attached around the die 148, and the fastening member 145 is attached to the square. Install around the holed member. The fastening member 145 and the fixing member 144 are configured to be coupled by screws, and the fastening member 145 is in contact with the square hole members 142 and 143 and the curved skirt portion of the square hole member, and the fixing member A gap 147 is formed between 144 and the fastening member 145. In this state, when the screw is tightened, the tightening member moves downward, and comes into contact with the curved hole skirt portion 142, 143 and the square holed member 142 from the tightening member 145 to the square holed member 142. , 143 is applied with the tightening force in the direction of arrow a shown in FIG. 15, and the members 142, 143 with square holes are pressed around the mold neck from the direction of arrow b.

  When using a cylindrical mold as shown in FIG. 4, use a member with a round hole instead of a square hole in a member with a square hole, and the above description is round as in the case of a member with a square hole. What is necessary is just to apply with respect to a member with a hole. In this case, if the term “neck circumference” is used instead of the term “neck circumference”, the application of the content becomes easier.

  A beam shaping element having a circular outer shape produced using a member with a round hole is difficult to adjust during assembly such as around the z axis. In order to avoid this, it is preferable to provide a flat portion on the side surface parallel to the bus of the element. As a method for forming the flat portion, cutting or polishing can be used. When cutting or polishing, if there is a reference line or a reference point, the processing becomes easier. Line processing and point processing are performed on the surface of the mold in advance so that such reference lines and reference points are formed on the molded element so that the reference lines and reference points are transferred and formed on the molded product. It is good to keep.

  From the above description, a representative beam shaping element manufacturing method of the present invention as described below is provided. Various other embodiments can be made with reference to the gist, purpose, and description of the present specification, and these inventions are also included in the present invention.

  1. A method of manufacturing a beam shaping element in which both sides are cylindrical surfaces, or one surface is a cylindrical surface and the other surface is an anamorphic surface, and the outer shape is a square, using a set of molds forming each surface A method of manufacturing a beam shaping element, comprising molding a glass material in a square hole of a member with a square hole forming four side surfaces of the element.

  2. 2. The method for manufacturing a beam shaping element according to 1 above, wherein the member with a square hole is an integral member.

  3. 3. The method of manufacturing a beam shaping element according to 2 above, wherein a member with a square hole is attached around the neck of the lower mold, and the upper mold is inserted into the square hole by an automatic operation of a molding machine.

  4). 4. The method of manufacturing a beam shaping element according to 3 above, wherein a mechanism capable of adjusting the relative eccentricity between the upper mold and the lower mold and / or the eccentricity of the tilt eccentricity is provided to the molding machine.

  5. 5. The method for manufacturing a beam shaping element according to 3 or 4 above, wherein the size of the square hole is 10 to 50 μm larger at room temperature both vertically and horizontally than the size around the neck of the lower mold.

  6). 6. The method of manufacturing a beam shaping element according to any one of the above 3 to 5, wherein a size around the neck of the upper die is smaller by 10 to 200 μm in both length and width than a size around the neck of the lower die.

  7). 3. The method of manufacturing a beam shaping element according to 2 above, wherein a member with a square hole is attached around the neck of the upper mold, and the lower mold is inserted into the square hole by automatic operation of a molding machine.

  8). 8. The method for manufacturing a beam shaping element according to 7 above, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.

  9. 9. The method of manufacturing a beam shaping element according to 7 or 8 above, wherein the size of the square hole is larger by 10 to 50 μm in both length and width than the size around the neck of the upper mold at room temperature.

  10. 10. The method of manufacturing a beam shaping element according to any one of 7 to 9 above, wherein the size of the lower mold around the neck is 10 to 200 [mu] m smaller in both length and width than the size of the upper mold around the neck.

  11. A method of manufacturing a beam shaping element having a circular outer shape in which both surfaces are cylindrical surfaces or one surface is a cylindrical surface and the other surface is an anamorphic surface, using a set of molds forming each surface A method of manufacturing a beam shaping element, comprising molding a glass material in a round hole of a member with a round hole forming a side surface of the element.

  12 12. The method for manufacturing a beam shaping element according to 11 above, wherein the member with a round hole is an integral object.

  13. 13. The method for manufacturing a beam shaping element according to the above 12, wherein a member with a round hole is attached to the diameter of the neck of the lower mold and the upper mold is inserted into the round hole by an automatic operation of a molding machine.

  14 14. The beam shaping element manufacturing method according to the above 13, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.

  15. 15. The method for manufacturing a beam shaping element according to 13 or 14 above, wherein the size of the round hole is 10 to 50 μm larger in length and width than the diameter of the neck of the lower mold at room temperature.

  16. 16. The method for manufacturing a beam shaping element according to any one of the above 13 to 15, wherein the neck circumference of the upper mold is smaller by 10 to 200 μm in both length and width than the neck circumference of the lower mold.

  17. 13. The method of manufacturing a beam shaping element according to 12 above, wherein a member with a round hole is attached to the diameter of the neck of the upper mold and the lower mold is inserted into the round hole by an automatic operation of a molding machine.

  18. 18. The method of manufacturing a beam shaping element according to 17 above, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.

  19. 19. The method for manufacturing a beam shaping element according to 17 or 18 above, wherein the size of the round hole is 10 to 50 μm larger than the diameter of the upper mold at the room temperature at room temperature.

  20. 20. The method of manufacturing a beam shaping element according to any one of the above 17 to 19, wherein the neck diameter of the lower mold is smaller by 10 to 200 μm in both length and width than the diameter of the neck of the upper mold.

  21. 2. The method of manufacturing a beam shaping element according to 1 above, wherein the member with a square hole is constituted by a plurality of constituent members.

  22. 22. The method for manufacturing a beam shaping element according to 21 above, wherein a step of attaching a member with a square hole around the neck of the lower mold and inserting the upper mold into the square hole by automatic operation of a molding machine.

  23. 23. The method for manufacturing a beam shaping element according to the above 22, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.

  24. 24. The method for manufacturing a beam shaping element according to the above item 22 or 23, wherein the size of the upper mold around the neck is 10 to 200 μm smaller in length and width than the size of the lower mold around the neck.

  25. Item 22. The method for manufacturing a beam shaping element according to Item 21, wherein a member with a square hole is attached around the neck of the upper mold, and the lower mold is inserted into the square hole by an automatic operation of a molding machine.

  26. 26. The method of manufacturing a beam shaping element as described in 25 above, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.

  27. 27. The method for manufacturing a beam shaping element according to the above 25 or 26, wherein the size of the lower mold around the neck is 10 to 200 μm smaller in both length and width than the size of the upper mold around the neck.

  28. The method for manufacturing a beam shaping element according to the above 21, wherein a square hole member is attached around the neck of the lower mold, and a glass material is automatically or manually placed on the lower mold, and then the upper mold is manually inserted into the square hole. .

  29. 29. The method of manufacturing a beam shaping element according to 28, wherein the size of the upper mold around the neck is substantially the same (± 5 μm) as the size of the lower mold.

  30. 12. The manufacturing method of the beam shaping element of said 11 with which a member with a round hole is comprised with multiple components.

  31. 31. The method for manufacturing a beam shaping element according to 30 above, wherein a member with a round hole is attached around the neck of the lower mold, and the upper mold is inserted into the round hole by an automatic operation of a molding machine.

  32. 32. The method for manufacturing a beam shaping element according to 31 above, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.

  33. 33. The method for manufacturing a beam shaping element according to the above item 31 or 32, wherein a diameter of the upper mold around the neck is 10 to 200 μm smaller than a size of the lower mold around the neck.

  34. 31. The method for manufacturing a beam shaping element as described in 30 above, wherein a member with a square hole is attached around the neck of the upper mold, and the lower mold is inserted into the square hole by an automatic operation of a molding machine.

  35. 35. The method of manufacturing a beam shaping element according to 34, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.

  36. 36. The method for manufacturing a beam shaping element according to the above 34 or 35, wherein the neck diameter of the lower mold is smaller by 10 to 200 μm in both length and width than the neck diameter of the upper mold.

  37. 31. The beam shaping element according to 30 above, wherein a member with a round hole is attached around the neck of the lower mold, and a glass material is automatically or manually placed on the lower mold, and then the upper mold is manually inserted into the round hole. Manufacturing method.

  38. 38. The method of manufacturing a beam shaping element according to claim 37, wherein the size of the upper mold around the neck is substantially the same (± 5 μm) as the size of the lower mold.

(The invention's effect)
The present invention provides a novel beam shaping element forming method.
When the beam shaping element is manufactured by the molding method of the present invention, post-processing after molding is unnecessary.
The beam shaping element manufactured by the molding method of the present invention has a high accuracy of eccentricity. Parallel eccentricity adjustment and tilt eccentricity adjustment are extremely easy.

The schematic sectional drawing of an up-and-down metal mold | die. The schematic perspective view of a beam shaping element. The schematic perspective view of a metal mold | die. The schematic perspective view of a metal mold | die. The schematic perspective view of a member with a square hole. The figure for demonstrating the attachment process to the up-and-down metal mold | die of the member with a square hole. The figure for demonstrating the attachment process to the up-and-down metal mold | die of the member with a square hole. The figure for demonstrating eccentric adjustment. The figure for demonstrating the relative positional relationship of a member with a square hole, and a metal mold | die. The schematic perspective view of the member with a square hole which consists of a plurality of members. The schematic sectional drawing of the member with a square hole which consists of a plurality of members. The figure for demonstrating the attachment method to the metal mold | die of the member with a square hole which consists of multiple members. The figure for demonstrating the attachment process to the up-and-down metal mold | die of the member with a square hole. The schematic sectional drawing of the member with a square hole which consists of a plurality of members. The figure for demonstrating the attachment method to the metal mold | die of the member with a square hole which consists of multiple members.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper mold 2 Lower mold 3 Mold base material 4 Cylindrical surface 31 Neck circumference size 32 Neck circumference size 33 Child wire direction 41 Neck circumference 51 Square hole 61 Square hole member 62 Lower mold 63 Upper mold 64 Glass Material 71 Member with square hole 72 Lower mold 73 Upper mold 74 Glass material 141 Cross section curved skirt part 142 Square hole member constituent member 143 Square hole member constituent member 144 Mold fixing member 145 Tightening member 146 Screw 147 Gap 148 Mold

Claims (38)

  A method of manufacturing a beam shaping element in which both sides are cylindrical surfaces, or one surface is a cylindrical surface and the other surface is an anamorphic surface, and the outer shape is a square, using a set of molds forming each surface A method of manufacturing a beam shaping element, comprising molding a glass material in a square hole of a member with a square hole forming four side surfaces of the element.   The method for manufacturing a beam shaping element according to claim 1, wherein the member with a square hole is an integral member.   The method of manufacturing a beam shaping element according to claim 2, wherein a step of attaching a member with a square hole around the neck of the lower mold and inserting the upper mold into the square hole by automatic operation of a molding machine.   The method of manufacturing a beam shaping element according to claim 3, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.   The method of manufacturing a beam shaping element according to claim 3 or 4, wherein the size of the square hole is larger by 10 to 50 µm in both length and width than the size around the neck of the lower mold at room temperature.   The method for manufacturing a beam shaping element according to any one of claims 3 to 5, wherein a size around the neck of the upper die is smaller by 10 to 200 µm in both length and width than a size around the neck of the lower die.   The method of manufacturing a beam shaping element according to claim 2, wherein a step of attaching a member with a square hole around the neck of the upper mold and inserting the lower mold into the square hole by an automatic operation of a molding machine.   The method of manufacturing a beam shaping element according to claim 7, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.   The method of manufacturing a beam shaping element according to claim 7 or 8, wherein the size of the square hole is larger by 10 to 50 µm in both length and width than the size around the neck of the upper mold at room temperature.   The method for manufacturing a beam shaping element according to any one of claims 7 to 9, wherein the size of the lower mold around the neck is 10 to 200 µm smaller in both length and width than the size of the upper mold around the neck.   A method of manufacturing a beam shaping element having a circular outer shape in which both surfaces are cylindrical surfaces or one surface is a cylindrical surface and the other surface is an anamorphic surface, using a set of molds forming each surface A method of manufacturing a beam shaping element, comprising molding a glass material in a round hole of a member with a round hole forming a side surface of the element.   The method for manufacturing a beam shaping element according to claim 11, wherein the member with a round hole is an integral member.   The method of manufacturing a beam shaping element according to claim 12, wherein a member with a round hole is attached to the diameter of the neck of the lower mold and the upper mold is inserted into the round hole by an automatic operation of a molding machine.   The method of manufacturing a beam shaping element according to claim 13, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.   The method of manufacturing a beam shaping element according to claim 13 or 14, wherein the size of the round hole is larger by 10 to 50 µm in both length and width than the diameter of the neck of the lower mold at room temperature.   The method of manufacturing a beam shaping element according to any one of claims 13 to 15, wherein a neck circumference diameter of the upper mold is smaller by 10 to 200 µm in both length and width than a neck circumference diameter of the lower mold.   The method of manufacturing a beam shaping element according to claim 12, wherein a member with a round hole is attached to a diameter around the neck of the upper mold, and the lower mold is inserted into the round hole by an automatic operation of a molding machine.   The method of manufacturing a beam shaping element according to claim 17, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.   The method of manufacturing a beam shaping element according to claim 17 or 18, wherein the size of the round hole is larger by 10 to 50 µm than the diameter of the upper die at room temperature.   The beam shaping element manufacturing method according to any one of claims 17 to 19, wherein the neck diameter of the lower mold is smaller by 10 to 200 µm in both length and width than the diameter of the neck of the upper mold.   The method for manufacturing a beam shaping element according to claim 1, wherein the member with a square hole is constituted by a plurality of constituent members.   The method for manufacturing a beam shaping element according to claim 21, wherein a member with a square hole is attached around the neck of the lower mold and the upper mold is inserted into the square hole by an automatic operation of a molding machine.   23. The method of manufacturing a beam shaping element according to claim 22, wherein a mechanism capable of adjusting eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.   The method for manufacturing a beam shaping element according to claim 22 or 23, wherein a size around the neck of the upper die is smaller by 10 to 200 µm in both length and width than a size around the neck of the lower die.   The method of manufacturing a beam shaping element according to claim 21, wherein a step of attaching a member with a square hole around the neck of the upper die and inserting the lower die into the square hole by an automatic operation of a molding machine.   The method of manufacturing a beam shaping element according to claim 25, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.   27. The method of manufacturing a beam shaping element according to claim 25 or 26, wherein a size around the neck of the lower die is smaller by 10 to 200 μm in both length and width than a size around the neck of the upper die.   The beam shaping element manufacturing method according to claim 21, wherein a square hole member is attached around the neck of the lower die, and a glass material is automatically or manually placed on the lower die, and then the upper die is manually inserted into the square hole. Method.   29. The method of manufacturing a beam shaping element according to claim 28, wherein the size of the upper mold around the neck is approximately the same (± 5 μm) as the size of the lower mold.   The method for manufacturing a beam shaping element according to claim 11, wherein the member with a round hole is constituted by a plurality of constituent members.   31. The method of manufacturing a beam shaping element according to claim 30, wherein a member with a round hole is attached around the neck of the lower mold and the upper mold is inserted into the round hole by an automatic operation of a molding machine.   32. The method of manufacturing a beam shaping element according to claim 31, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the upper die and the lower die is provided to the molding machine.   The method of manufacturing a beam shaping element according to claim 31 or 32, wherein a diameter of the upper mold around the neck is smaller by 10 to 200 µm than a size of the lower mold around the neck.   31. The method of manufacturing a beam shaping element according to claim 30, wherein a step of attaching a member with a square hole around the neck of the upper mold and inserting the lower mold into the square hole by an automatic operation of a molding machine.   35. The method of manufacturing a beam shaping element according to claim 34, wherein a mechanism capable of adjusting the eccentricity of relative parallel eccentricity and / or inclination eccentricity between the lower mold and the upper mold is provided to the molding machine.   36. The method of manufacturing a beam shaping element according to claim 34 or 35, wherein the neck circumference of the lower mold is smaller by 10 to 200 μm in both length and width than the neck circumference of the upper mold.   31. The beam shaping according to claim 30, wherein a member with a round hole is attached around the neck of the lower die, and a glass material is automatically or manually placed on the lower die, and then the upper die is manually inserted into the round hole. Device manufacturing method.   38. The method of manufacturing a beam shaping element according to claim 37, wherein the size of the upper mold around the neck is substantially the same (± 5 μm) as the size of the lower mold.

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