JP2010173919A - Mold, method for manufacturing optical element and optical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold in which slidability between a body mold and a lower die or an upper die is enhanced while adjusting the relative position of an installation face for glass and a pressing face in high precision, and with which assembling of a press mold for glass or pressing of glass can be thereby smoothly performed. <P>SOLUTION: The mold 1a is used for pressing glass G and includes: a lower die 11a having an installation face 111 on which the glass G is installed; an upper die 12a for pressing the glass G by the approach to the lower die 11a and the separation from the lower die 11a; and a body mold 13a for regulating the orbital of the approach and the separation by surrounding the lower die 11a and the upper die 12a. The mold 1a has an abutting part 141a and 143a where the body mold 13a abuts with the lower die 11a or the upper die 12a and a separation part 142a where the body mold 13a separates from the lower die 11a or the upper die 12a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mold, an optical element manufacturing method, and an optical apparatus.

  In recent years, optical lenses formed into a predetermined shape have been used for lenses of optical elements such as digital cameras. In order to manufacture this optical lens with high accuracy and in large quantities, for example, the following methods are known. That is, first, a molten glass is used to form a glass lump (hereinafter referred to as a preform) having a shape approximate to the shape of the optical lens, and then the preform is press-molded with a mold and hot-worked. .

  According to this method, since an optical lens is molded from molten glass through a preform, the optical lens is manufactured from a plate-like glass through a multi-step process such as cutting, processing, pressing, grinding, and polishing. In comparison, the lead time can be shortened, and a decrease in yield due to processing defects can be suppressed. As a result, the cost can be greatly reduced.

  Here, as a mold used for press molding, for example, as shown in FIG. 8, in order to allow the upper mold to be smoothly inserted into the trunk mold, a pressing cylinder mold 93, a lower mold 91, an upper mold 92, As a means for introducing gas into the sliding portion, a molding die 90 is disclosed in which a gap K is provided and the lower die 91 and the upper die 92 are not in contact with the body die 93 (see Patent Document 1). .

JP 2002-104833 A

  However, in the mold disclosed in Patent Document 1, the gap between the lower mold and the upper mold and the trunk mold may become large, and the glass installation surface provided on the lower mold is the glass provided on the upper mold. It is difficult to make the position constant with respect to the pressing surface, and as a result, the eccentricity of the molded optical element may be disadvantageous. For this reason, particularly in precision press molding in which the molded shape becomes the shape of the final product, high accuracy of the positional relationship between the installation surface and the pressing surface is required, so the molding die disclosed in Patent Document 1 should be used. Have difficulty.

  On the other hand, a means of not providing the gap K in the sliding portion between the lower mold 91 and the upper mold 92 is also conceivable, but in this case, the slidability between the lower mold or the upper mold and the trunk mold is deteriorated.

  The present invention has been made in view of the above problems, and the object of the present invention is to adjust the position of the installation surface to the position of the pressing surface with high accuracy while sliding the lower mold or the upper mold to the trunk mold. An object of the present invention is to provide a mold capable of increasing the mobility and smoothly assembling the glass pressing mold and pressing the glass.

  As a result of intensive studies and studies to solve the above-mentioned problems, the present inventors have separated the contact portion where the body mold and the lower mold or the upper mold are in contact with each other, and the body mold and the lower mold or the upper mold are separated from each other. By providing the separation portion, the position of the upper mold is defined by the contact portion, and the space near the glass and the space formed by the separation portion can easily exchange gas, and It has been found that the contact area between the body mold and the lower mold or the upper mold is reduced by the separation portion, and the present invention has been completed.

  (1) A mold used for pressing glass, a lower mold in which the glass is installed on an installation surface, an upper mold that presses the glass close to and away from the lower mold, and the lower mold A body mold that surrounds the mold and the upper mold to define the approaching and separating tracks, a contact portion where the body mold and the lower mold or the upper mold abut, the body mold and the A mold having a lower part or a separating part from which the upper mold is separated.

  (2) The mold according to (1), wherein the separation part is separated from the outside of the mold by the contact part.

  (3) The mold according to (1) or (2), wherein the separation portion includes a first recess provided on a surface of the body mold that faces the lower mold or the upper mold.

  (4) The mold according to any one of (1) to (3), wherein the separation portion further includes a second recess provided on a surface of the lower mold and / or the upper mold that faces the body mold. .

  (5) The mold according to (3) or (4), wherein the first recess and / or the second recess has a groove extending in a direction including the axial direction of the body mold, the lower mold, and / or the upper mold. .

  (6) The mold according to (5), wherein the first recess and / or the second recess has a groove extending spirally in the body mold, the lower mold, and / or the upper mold.

  (7) The lower mold and / or the upper mold includes a flange portion that is brought into close contact with and locked to an end of the trunk mold when the lower mold and the upper mold are brought close to each other (5) or ( 6) The mold according to the above.

  (8) A method for manufacturing an optical element using the mold according to any one of (1) to (7).

  (9) An optical apparatus using the optical element manufactured by the manufacturing method according to (8).

  According to the present invention, the position of the upper mold is regulated by the abutment portion by providing the abutment portion where the body mold and the lower mold or the upper mold abut, and the separation portion where the abutment mold is separated from each other. It is easy to exchange gas between a space near the space and a space formed by the separation portion. Further, the contact area between the body mold and the lower mold or the upper mold is reduced by the separation portion. Therefore, a mold that can smoothly assemble the mold and press the glass by improving the slidability between the lower mold or the upper mold and the body mold while aligning the positions of the installation surface and the pressing surface with high accuracy. Can provide.

It is sectional drawing of the shaping | molding die concerning 1st Embodiment of this invention. It is sectional drawing which shows operation | movement of the shaping | molding die of FIG. It is sectional drawing which shows an example of the trunk | drum type | mold used for the shaping | molding die of this invention. It is sectional drawing which shows the modification of the trunk | drum type | mold used for the shaping | molding die of this invention. It is sectional drawing which shows the modification of the lower mold | type used for the shaping | molding die of this invention. It is sectional drawing which shows an example of the manufacturing method of the optical element using the shaping | molding die of this invention. It is a top view which shows an example of the manufacturing method of the optical element using the shaping | molding die of this invention. It is sectional drawing which shows operation | movement of the shaping | molding die concerning a prior art.

  The mold according to the present invention is a mold used for pressing glass, a lower mold in which the glass is installed on an installation surface, and an upper mold that presses the glass while approaching and separating from the lower mold. And a barrel mold that surrounds the lower mold and the upper mold to define the approaching and separating tracks, and the abutting portion where the trunk mold and the lower mold or the upper mold abut, A body part and a separation part that separates the lower mold or the upper mold.

  Hereinafter, embodiments of the mold, the optical element manufacturing method, and the optical apparatus of the present invention will be described in detail. However, the present invention is not limited to the following embodiments, and is within the scope of the object of the present invention. However, it can implement by changing suitably. In addition, although description may be abbreviate | omitted suitably about the location where description overlaps, the meaning of invention is not limited.

<First Embodiment>
1st Embodiment of this invention is the shaping | molding die 1a provided with the lower mold | type 11a and the upper mold | type 12a which press the glass G, and the trunk | drum 13a surrounding the lower mold | type 11a and the upper mold | type 12a. FIG. 1 is a cross-sectional view of a mold according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the operation of the mold shown in FIG. FIG. 3 is a cross-sectional view showing an example of a body mold used in the mold of the present invention. FIG. 4 is a cross-sectional view showing a modification of the body mold used in the mold of the present invention. FIG. 5 is a cross-sectional view showing a modification of the lower mold used in the mold of the present invention. FIG. 6 is a cross-sectional view showing an example of a method for producing an optical element using the mold of the present invention. FIG. 7 is a plan view showing an example of a method for producing an optical element using the mold of the present invention.

[Lower mold and upper mold]
As shown in FIG. 1, the molding die 1a has a lower die 11a and an upper die 12a. Among these, the upper surface of the lower mold 11a has an installation surface 111 on which the glass G is installed on the upper side. The lower surface of the upper mold 12a has a pressing surface 121 that faces the installation surface 111 of the lower mold 11a and presses the glass G while approaching and separating from the installation surface 111.

  Here, the material of the lower mold 11a and the upper mold 12a is appropriately set according to the hardness of the glass G, the glass transition point (Tg), etc., but is tungsten in that it can withstand the pressure when the glass G is pressed. It is preferable to use a cemented carbide member such as carbide (WC). Moreover, the shape of the lower mold | type 11a and the upper mold | type 12a is suitably set according to the shape of the glass molded object produced by press. Note that a protective film (not shown) may be formed on each of the installation surface 111 and the pressing surface 121.

[Body type]
As shown in FIG. 1, the molding die 1 a has a body die 13 a so as to abut against a part of the lower die 11 a and the upper die 12 a and to surround these side surfaces. As a result, an abutting portion 141a where the body mold 13a and the lower mold 11a or the upper mold 12a abut is formed, and the abutting portion 141a defines the path of approach and separation between the lower mold 11a and the upper mold 12a. Therefore, when the upper mold 12a is inserted into the trunk mold 13a as shown in FIG. 2 (a) and then the lower mold 11a and the upper mold 12a are brought close as shown in FIG. The positional relationship of the surface 121 can be kept constant. Accordingly, a glass G molded body having a desired shape can be produced. In the present invention, the body mold 13a and the lower mold 11a or the upper mold 12a "contact" means that the distance between the cylinder mold 13a and the lower mold 11a or the upper mold 12a is preferably 0.010 mm or less, More preferably, it is 0.005 mm or less, and most preferably 0.003 mm or less.

  The material of the body mold 13a is not particularly limited as long as it is a material that can withstand the heat when the glass G is pressed and is not easily deformed, but may be formed of a material having lower thermal conductivity than the lower mold 11a and the upper mold 12a. Good. Thereby, it becomes difficult for heat to be transmitted to the trunk mold 13a, and heat exchange with the outside through the trunk mold 13a is reduced, so that the thermal efficiency in the molding process can be increased. Further, the shape of the body mold 13a is preferably a cylindrical shape in that the glass G can be pressed with an equal force, but is not limited thereto, and may be, for example, a rectangular tube shape, and a plurality of lower molds 11a. The upper mold 12a may be stored in parallel.

(Separation part)
As shown in FIG. 1, the molding die 1 a is provided with a separation portion 142 a adjacent to the contact portion 141 a so that the body die 13 a and the upper die 12 a are separated. Thereby, a space is formed in the separation portion 142a between the upper mold 12a and the trunk mold 13a. Therefore, when the upper mold 12a is brought close to the lower mold 11a in the body mold 13a (FIG. 2B), and thereafter, the glass G is pressed by the installation surface 111 of the lower mold 11a and the pressing surface 121 of the upper mold 12a. In doing so (FIG. 2C), the gas in the space H near the glass G can be easily escaped to the separation portion 142a. Further, when the upper mold 12a is separated from the lower mold 11a after the glass G is pressed (FIG. 2D), the gas escaped to the separating portion 142a can be easily returned to the void H.

  Furthermore, by providing the separation part 142a as described above, the contact area between the upper mold 12a and the body mold 13a is reduced by the separation part 142a. Therefore, the frictional force between the upper mold 12a and the trunk mold 13a can be reduced.

  From the above, while maintaining the positional relationship between the installation surface 111 and the pressing surface 121 with high accuracy, the slidability between the lower mold 11a or the upper mold 12a and the body mold 13a is improved, so that the molding mold can be assembled and the glass can be pressed. A mold that can be smoothly performed can be provided.

  Here, the separation part 142a may be separated from the outside of the mold 1a by a contact part 141a provided on the side surfaces of the lower mold 11a and the upper mold 12a. Thereby, while the gas in the void H escapes to the separation portion 142a, the movement of the gas is hindered by the contact portion 141a, and the outflow of the gas to the outside of the mold 1a through the separation portion 142a is reduced. . Therefore, heat exchange between the glass G and the outside of the mold 1a can be reduced, and both the slidability between the upper mold 12a and the body mold 13a and the heat retention of the glass can be achieved.

  The separation portion 142a is roughly classified into a first recess provided on the body mold 13a side and a second recess provided on the lower mold 11a and upper mold 12a side, depending on the position of the separation part 142a.

  Among these, the 1st recessed part 131a is provided in the surface facing the lower mold | type 11a or the upper mold | type 12a among the trunk molds 13a. Thereby, when the upper mold 12a is brought close to the lower mold 11a (FIG. 2B) or when the upper mold 12a is separated from the lower mold 11a (FIG. 2D), at least temporarily the first recess And void H communicate. Therefore, gas exchange between the space H and the separation portion 142a can be performed smoothly, and the slidability between the upper mold 12a and the trunk mold 13a can be further improved.

  On the other hand, the 2nd recessed part 122a is provided in the surface facing the trunk | drum 13a among at least one of the lower mold | type 11a and the upper mold | type 12a. As a result, the second recess 122a formed in the upper mold 12a slides according to the operation of the upper mold 12a, and when the upper mold 12a approaches the lower mold 11a (FIG. 2B), the upper mold 12a. When separating the lower mold 11a from the lower mold 11a (FIG. 2 (d)), or when assembling the lower mold 11a and the body mold 13a, the second recess 122a is easily communicated with the outside of the mold 1a. Here, when the upper mold 12a is brought close to the lower mold 11a or when the mold 1a is heated, the second recess 122a is in a pressurized state, and the upper mold 12a is moved away from the second recess 122a. To receive. On the other hand, when the upper mold 12a is separated from the lower mold 11a or when the mold 1a is cooled, the second recess 122a is in a reduced pressure state, and a force is exerted in a direction in which the upper mold 12a is attracted to the second recess 122a. To receive. The force received by the upper mold 12a when the second recess 122a is in a pressurized or depressurized state increases the frictional force between the lower mold 11a and the upper mold 12a and the trunk mold 13a. Accordingly, since the second recess 122a is easily communicated with the outside of the mold 1a, the internal pressure of the separation portion 142a can be easily adjusted, and the frictional force between the lower mold 11a and the upper mold 12a and the body mold 13a is increased. Can be suppressed.

  The 1st recessed part 131a of this embodiment is a groove | channel extended in the direction containing the axial direction A of the trunk | drum 13a. By extending the groove in a direction including the axial direction A, when the upper mold 12a is inserted into the body mold 13a, the distance from the void H to the groove in the axial direction A and the groove 1a of the mold 1a. The distance in the axial direction A to the outside is shortened. Therefore, it is possible to easily adjust the internal atmospheric pressure in the void H through the groove.

  Here, the groove | channel extended in the direction containing the axial direction A of the trunk | drum 13a is a groove | channel extended helically as shown in FIG. 3 more specifically. In particular, as shown in FIG. 3, the groove extends in a spiral shape, so that the groove can be formed by contacting the tool while rotating the body mold 13a around the center axis X of the body mold 13a. Therefore, the groove can be formed more efficiently.

  The shape of the first recess is not limited to the form extending in a spiral shape as shown in FIG. 3, but may be a groove extending along the axial direction A as shown in FIG. As shown in b), the spirally extending grooves may intersect each other. Further, the first recess is not limited to the form extending in the direction including the axial direction A, and may be provided extending in a direction perpendicular to the axial direction A as shown in FIG. For example, as shown in FIGS. 5A to 5C, the second recess may be a groove extending in a direction including the axial direction A.

  In the present embodiment, when the upper mold 12a slides in the body mold 13a, more specifically, when the upper mold 12a presses the glass G, the first recess 131a extending in the direction including the axial direction A is: Communication with the second recess 122a is possible (see range α in FIG. 1). Thereby, the gas in the void H escapes to the first recess 131a, and then the gas escaped to the first recess 131a escapes to the second recess 122a. In particular, the first recess 131a is more preferably capable of communicating with both the space H and the second recess 122a at the same time. Thereby, the gas in the void H flows into the second recess 122a through the first recess 131a. Therefore, the slidability between the upper mold 12a and the trunk mold 13a can be further enhanced.

  At this time, at least one of the lower mold 11a and the upper mold 12a includes flanges 113a and 123a that are brought into close contact with the end of the body mold 13a when the lower mold 11a and the upper mold 12a are approached. Is preferred. As a result, the cross section or outer surface of the body mold 13a abuts against the flange 123a to form contact parts 143a and 144a, and heat and gas leakage from the inside of the mold 1a is reduced. And the slidability of the upper mold | type 12a and the heat retention of glass G can be made compatible. Here, when the lower mold 11a includes the flange portion 113a, the adhesion of the contact portion 143a is enhanced by the weight of the trunk mold 13a, while when the upper mold 12a includes the flange portion 123a, the weight of the upper mold 12a. This improves the adhesion of the contact portion 144a.

  The spacing portion 142a is not limited to being provided adjacent to the upper mold 12a of the mold 1a, and may be provided on the lower mold 11a side. In this case, the contact area between the lower mold 11a and the trunk mold 13a is reduced, and the slidability between the lower mold 11a and the trunk mold 13a is improved. Therefore, when the molding mold 1a is assembled, the trunk mold 13a is smoothly lowered. 11a can be mounted.

[Press forming equipment]
The mold 1 is used in a press molding apparatus that manufactures an optical element L by pressing glass. Here, the press molding device is not particularly limited as long as the step of moving and stopping the molding die 1 and the step of heating and pressing the glass are performed, but as shown in FIGS. 6 and 7, for example, Supply means 31 for supplying the glass G between the lower mold 11 and the upper mold 12 of the mold 1, a heating stage 32 for softening the glass G, a pressing stage 33 for pressing the glass G, and cooling for cooling the glass G It is preferable to use a press molding apparatus 3 including a stage 34. Thereby, the glass G can be smoothly pressed on the pressing stage 33, and the time required for pressing can be shortened, so that the productivity of the optical element L can be increased.

[Supply means]
The supply means 31 for supplying the glass G between the lower mold 11 and the upper mold 12 can be appropriately selected according to the size of the glass G, the shape of the mold 1, and the like. For example, the glass G is adsorbed by the suction force of the pump. An adsorbing means (not shown) for holding and supplying the glass G to the lower mold 11 can be used.

  In this press molding apparatus 3, the glass G is supplied to the lower mold 11 of the mold 1 using the supply means 31, the mold 1 is assembled, and the mold 1 a is moved to the heating stage 32. The means for moving the mold 1 is not particularly limited as long as the mold 1 can be moved and stopped. For example, the mold 1 is pushed in and transported by using a mold transport unit 36 as shown in FIGS. Alternatively, the mold 1 may be transported using a belt conveyor.

[Heating stage]
In the heating stage 32, the mold 1 and the glass G are heated, and the glass G is softened to the extent that it can be press-molded. The heat source of the heating stage 32 is not particularly limited as long as it is a means capable of heating the mold 1 to the molding temperature of the glass G. For example, infrared heating, a gas burner, an induction coil, a heating wire, or the like can be used. Among them, it is preferable to use means for heating the surface on which the mold 1 is installed and applying heat to the glass G through the lower mold 11 and the upper mold 12. Thereby, since the rate at which the added heat escapes through the outside air or the like is reduced, the thermal efficiency when the glass G is heated can be increased.

[Pressing stage]
The pressing stage 33 presses and press-molds the glass G softened by the heating stage 32, and press-molds the glass G into a desired shape.

[Cooling stage]
The cooling stage 34 gradually cools the mold 1 while sequentially moving the mold 1 after press molding. Thereby, since the damage by the rapid temperature change of the glass G and the shaping | molding die 1 is reduced, the lifetime of the shaping | molding die 1 can be extended, reducing the damage of the glass G. FIG.

[Removal means]
The take-out means 35 disassembles the molding die 1 taken out from the cooling stage 34 into the lower die 11 and the upper die 12 and takes out the optical element L. Here, means for disassembling the mold 1 and taking out the optical element L can be appropriately selected according to the size of the glass G, the shape of the mold 1 and the like. For example, the upper mold 12 is lifted and removed by a holder (not shown). After that, means for adsorbing and holding the glass G by a suction force of a pump (not shown) can be used.

[Production of optical equipment]
An optical element L such as a lens or a prism is produced by the press molding apparatus 3 described above. It is also preferable to manufacture an optical device such as a camera or a projector using the optical element L manufactured by the optical element manufacturing apparatus having the press molding apparatus 3. Thereby, since the glass G is smoothly press-molded with high thermal efficiency, the manufacturing cost of the optical element L and the optical apparatus can be reduced.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, this invention is not limited to a following example.

  As a die unit for press molding, a mold main body having a diameter of 15.0 mm and a flange part having a diameter of 20.0 mm and a height of 2.0 mm adjacent to the surface opposite to the installation surface or the pressing surface of the mold main body, , And a cylindrical body mold made of WC having an inner diameter of 15.0 mm, an outer diameter of 20.0 mm, and a height of 22.0 mm. Here, the total height of the lower mold and the upper mold is 25.0 mm. Among these, a spiral groove having a width of 1.0 mm and a depth of 0.1 mm was provided on the inner surface of the trunk mold so that the interval in the axial direction of the trunk mold was 1.0 mm. In addition, an annular groove having a width of 1.0 mm and a depth of 0.1 mm was provided in a portion adjacent to the collar portion of the outer surfaces of the upper mold and the lower mold.

  Attach this mold to a predetermined position of the press molding device, lift the upper mold using a holder, supply glass to the lower mold of the mold, fit the barrel mold to the lower mold, and fit the upper mold to the barrel mold The lower mold, the upper mold, and the body mold were assembled into a mold. Next, the mold was moved to the press molding apparatus using the mold conveying unit.

  The press molding apparatus used was equipped with a heating stage, a pressing stage, and a cooling stage in this order. The mold moved to the press molding apparatus moved on the heating stage using a mold conveying unit, and the glass was heated and softened. Then, when the mold reached a predetermined position on the pressing stage, the movement of the mold was stopped, the upper mold was lowered using a pressing means with a force of 100 kgf to press the glass, and the glass was press-molded. After press molding, the mold was further moved using a mold conveying unit, and the mold was gradually cooled while being sequentially moved on the cooling stage. The molding die taken out from the press molding apparatus after passing through the cooling stage was disassembled into an upper die and a lower die, and the optical element was taken out.

  As a comparative example, the same test as that of the example was performed when the lower mold, the upper mold, and the trunk mold were not provided with the separation portion.

  As a result, the time required to assemble the lower mold, the upper mold and the barrel mold into the molding mold was 10 seconds when the lower mold, the upper mold and the barrel mold were not provided with the separation section, but the separation section was provided. In this case, it was shortened to 5 seconds. Further, the time required for pressing the glass was 60 seconds when the separation portion was not provided, but was shortened to 50 seconds when the separation portion was provided. On the other hand, the accuracy (eccentricity) of the center position of the molding surface after molding was ± 0.03 mm when the separation portion was not provided, but ± 0.03 mm when the separation portion was provided. There was no significant difference. Comparing the press molding process of the example and the comparative example, the slidability between the lower mold or the upper mold and the body mold is improved while the positional relationship of the molding surface is adjusted with high accuracy, and the mold is assembled and the glass is pressed. Since the time required for pressing the glass can be reduced smoothly, it can be seen that the productivity of the press molding process can be improved.

DESCRIPTION OF SYMBOLS 1 Mold 11 Lower mold 111 Installation surface 112 Press surface 12 Upper mold 121 Press surface 122a 2nd recessed part 123a Ridge part 13 Body mold 131a 1st recessed part 141a, 143a, 144a Contact part 142a Separation part 3 Press molding apparatus
31 Supply means 32 Heating stage 33 Pressing stage 34 Cooling stage 35 Extraction means 36 Mold transfer unit

Claims (9)

A mold used to press glass,
A lower mold in which the glass is installed on the installation surface, an upper mold that presses the glass by approaching and separating from the lower mold, and a track for the approach and separation by enclosing the lower mold and the upper mold A torso mold,
A molding die having a contact portion where the barrel die and the lower die or the upper die abut, and a separation portion where the barrel die and the lower die or the upper die are separated.   The mold according to claim 1, wherein the spacing portion is separated from the outside of the mold by the contact portion.   3. The mold according to claim 1, wherein the separation portion includes a first recess provided on a surface of the body mold that faces the lower mold or the upper mold.   4. The molding die according to claim 1, wherein the separation portion further includes a second recess provided on a surface of the lower die and / or the upper die facing the body die. 5.   The mold according to claim 3 or 4, wherein the first recess and / or the second recess has a groove extending in a direction including an axial direction of the body mold, the lower mold, and / or the upper mold.   The mold according to claim 5, wherein the first recess and / or the second recess has a groove extending spirally in the body mold, the lower mold and / or the upper mold.   The molding according to claim 5 or 6, wherein the lower mold and / or the upper mold includes a flange portion that is brought into close contact with an end portion of the trunk mold when the lower mold and the upper mold are brought close to each other. Type.   The manufacturing method of the optical element using the shaping | molding die in any one of Claim 1 to 7.   An optical apparatus using the optical element manufactured by the manufacturing method according to claim 8.

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