TW201700413A - Glass material for press molding, method for manufacturing thereof and method for manufacturing optical element which is capable of obtaining desired optical properties without impairing the shape accuracy of the optical element - Google Patents
Glass material for press molding, method for manufacturing thereof and method for manufacturing optical element which is capable of obtaining desired optical properties without impairing the shape accuracy of the optical element Download PDFInfo
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- TW201700413A TW201700413A TW105119069A TW105119069A TW201700413A TW 201700413 A TW201700413 A TW 201700413A TW 105119069 A TW105119069 A TW 105119069A TW 105119069 A TW105119069 A TW 105119069A TW 201700413 A TW201700413 A TW 201700413A
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- 238000000465 moulding Methods 0.000 title claims abstract description 178
- 239000011521 glass Substances 0.000 title claims abstract description 156
- 239000000463 material Substances 0.000 title claims abstract description 144
- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 16
- 230000003746 surface roughness Effects 0.000 claims abstract description 105
- 238000005498 polishing Methods 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- XBJJRSFLZVLCSE-UHFFFAOYSA-N barium(2+);diborate Chemical compound [Ba+2].[Ba+2].[Ba+2].[O-]B([O-])[O-].[O-]B([O-])[O-] XBJJRSFLZVLCSE-UHFFFAOYSA-N 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 230000005499 meniscus Effects 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 238000007517 polishing process Methods 0.000 description 3
- 101150083238 bsc7 gene Proteins 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
- C03B2215/46—Lenses, e.g. bi-convex
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
本發明關於壓製成型用玻璃素材及壓製成型用玻璃素材之製造方法，尤其關於具有至少一個凸面之壓製成型用玻璃素材、壓製成型用玻璃素材之製造方法及光學元件之製造方法。 The present invention relates to a glass material for press molding and a method for producing a glass material for press molding, and more particularly to a glass material for press molding having at least one convex surface, a method for producing a glass material for press molding, and a method for producing an optical element.
作為製造具有至少一個凸面之光學元件(玻璃透鏡)之方法之一，具有下述成型方法：利用成型模具對具有至少一個凸面之壓製成型用玻璃素材進行壓制。 As one of methods for producing an optical element (glass lens) having at least one convex surface, there is a molding method in which a glass material for press molding having at least one convex surface is pressed by a molding die.
經由定心工序等冷加工而形成的壓製成型用玻璃素材之側端面一般具有磨砂狀之粗面，該粗面包括銳角的凹凸。故，上述成型方法中，呈銳角之凹凸之前端部有時會由壓製成型用玻璃素材之側端面以微小顆粒之形式脫離，落於成型模具上。又，會產生下述問題：此種微小顆粒於壓製成型中會進入壓製成型用玻璃素材與成型模具之間，於壓製成型得到的光學元件(玻璃透鏡)之表面產生點狀的不良部分。 The side end surface of the glass material for press molding formed by cold working such as a centering process generally has a matte-like rough surface including an acute-angled unevenness. Therefore, in the above-described molding method, the end portion of the glass material having an acute angle may be detached from the side end surface of the glass material for press molding in the form of fine particles, and may fall on the molding die. Further, there is a problem in that such fine particles enter between the glass material for press molding and the molding die during press molding, and a dot-like defective portion is formed on the surface of the optical element (glass lens) obtained by press molding.
為了應對此種問題，提出了下述處理方案：於壓製成型之前，對壓製成型用玻璃素材之側端面進行加熱從而將具有呈銳角之凹凸之表面熔融，由此使呈銳角之凹凸之前端部 鈍角化，防止微小顆粒由側端面脫離(專利文獻1)。 In order to cope with such a problem, a treatment scheme is proposed in which the side end surface of the glass material for press molding is heated to melt the surface having the unevenness of the acute angle before the press molding, thereby making the end portion of the uneven portion having an acute angle The blunt angle prevents the fine particles from being separated from the side end faces (Patent Document 1).
專利文獻1：日本特開2011-16675號公報 Patent Document 1: Japanese Laid-Open Patent Publication No. 2011-16675
然而，即使係進行了專利文獻1所述處理之情況，於壓製成型用玻璃素材之側端面依然會殘留有凹凸形狀。 However, even in the case of the treatment described in Patent Document 1, the uneven shape remains on the side end surface of the glass material for press molding.
另一方面，壓製成型時，藉由成型模具使壓製成型用玻璃素材變形時，鄰接於凸面之側端面捲入成型模具之成型面側而被壓制，構成了壓製成型得到的光學元件(玻璃透鏡)之邊緣部。 On the other hand, in the press molding, when the glass material for press molding is deformed by a molding die, the side end surface adjacent to the convex surface is wound onto the molding surface side of the molding die and pressed, thereby forming an optical element (glass lens) obtained by press molding. The edge of the edge.
對於殘留有凹凸形狀之側端面藉由壓制而成型得到的成型面而言，其具有形狀不良，故產生無法得到所期望的光學性能之問題。由此，不得不將該具有形狀不良的部分廢棄，導致玻璃素材浪費之増加、即成本增大。 The molded surface obtained by pressing the side end surface on which the uneven shape is left has a shape defect, and thus a problem that the desired optical performance cannot be obtained occurs. Therefore, it is necessary to discard the portion having a poor shape, resulting in a waste of the glass material, that is, an increase in cost.
本發明鑑於此種課題完成，其以於不損害壓製成型得到的光學元件之形狀精度之情況下得到所期望的光學性能，以低成本提供壓製成型用玻璃素材、壓製成型用玻璃素材之製造方法及光學元件之製造方法。 In view of the above-described problems, the present invention provides a glass material for press molding and a method for producing a glass material for press molding at a low cost without impairing the shape accuracy of the optical element obtained by press molding. And a method of manufacturing an optical component.
本發明關於一種壓製成型用玻璃素材，其包括：表面粗糙度Ra為第1表面粗糙度Ra1之至少一個凸面；及配置於上述凸面之周圍且表面粗糙度Ra為第2表面粗糙度Ra2之側端面，第2表面粗糙度Ra2小於0.10μm，並且第2表面粗糙度Ra2大於第1表面粗糙度Ra1。 The present invention relates to a glass material for press molding, comprising: at least one convex surface having a surface roughness Ra of a first surface roughness Ra1; and a side disposed around the convex surface and having a surface roughness Ra of a second surface roughness Ra2 The end surface has a second surface roughness Ra2 of less than 0.10 μm, and the second surface roughness Ra2 is larger than the first surface roughness Ra1.
本發明還關於一種壓製成型用玻璃素材之製造方法，其包括下述工序：準備工序，用於準備壓製成型用玻璃素 材材料，該壓製成型用玻璃素材材料具有至少一個凸面、及配置於凸面之周圍且表面粗糙度Ra大於凸面之第1表面粗糙度Ra1的側端面；以及研磨工序，用於對側端面進行研磨，從而得到表面粗糙度Ra小於0.10μm、且大於凸面之上述第1表面粗糙度Ra1之表面粗糙度Ra。 The present invention also relates to a method for producing a glass material for press molding, which comprises the following steps: a preparation step for preparing a glass mold for press molding The material for the press molding has at least one convex surface, and a side end surface disposed around the convex surface and having a surface roughness Ra greater than a first surface roughness Ra1 of the convex surface; and a polishing step for grinding the side end surface Thus, the surface roughness Ra of the surface roughness Ra of less than 0.10 μm and larger than the first surface roughness Ra1 of the convex surface is obtained.
基於本發明之壓製成型用玻璃素材及壓製成型用玻璃素材之製造方法，側端面之第2表面粗糙度Ra2大於至少一個凸面之第1表面粗糙度Ra1之情況下，第2表面粗糙度Ra2小於0.10μm。故，即使鄰接於凸面之側端面捲入成型模具之成型面側而被壓制，於可於不損害形狀精度之情況下得到具有良好的光學性能之光學元件。 According to the glass material for press molding of the present invention and the method for producing a glass material for press molding, when the second surface roughness Ra2 of the side end surface is larger than the first surface roughness Ra1 of at least one convex surface, the second surface roughness Ra2 is smaller than 0.10 μm. Therefore, even if the side end surface adjacent to the convex surface is wound onto the molding surface side of the molding die and pressed, an optical element having good optical properties can be obtained without impairing the shape accuracy.
基於此種構成的本發明，可於不損害壓製成型得到的光學元件之形狀精度之情況下得到所期望的光學性能，能以低成本提供壓製成型用玻璃素材、壓製成型用玻璃素材之製造方法及光學元件之製造方法。 According to the present invention, the desired optical performance can be obtained without impairing the shape accuracy of the optical element obtained by press molding, and the glass material for press molding and the glass material for press molding can be provided at low cost. And a method of manufacturing an optical component.
10、20、30‧‧‧壓製成型用玻璃素材 10, 20, 30‧ ‧ ‧ glass material for press molding
10a、20a、30a‧‧‧凸面 10a, 20a, 30a‧‧ ‧ convex
11‧‧‧側端面 11‧‧‧ side end face
11a、11a’‧‧‧外周面 11a, 11a’‧‧‧ outer perimeter
11b、11b’‧‧‧倒角部 11b, 11b’‧‧‧Chamfering
10’‧‧‧壓製成型用玻璃素材材料 10'‧‧‧ Glass material for press molding
10a’‧‧‧壓製成型用玻璃素材材料之凸面 10a'‧‧‧The convex surface of the glass material for press forming
11’‧‧‧壓製成型用玻璃素材材料之側端面 11'‧‧‧ Side end face of glass material for press forming
12‧‧‧研磨用墊 12‧‧‧ polishing pad
14‧‧‧壓製成型用玻璃素材材料固定用夾具 14‧‧‧Fixed fixture for glass material for press forming
16‧‧‧墊固定用夾具 16‧‧‧Mask fixing fixture
20b‧‧‧平坦面 20b‧‧‧flat surface
30b‧‧‧凹面 30b‧‧‧ concave
40、40’‧‧‧連結面 40, 40’‧‧‧ link
第1圖係壓製成型用玻璃素材之示意性側面圖。 Fig. 1 is a schematic side view of a glass material for press molding.
第2圖係經過定心加工、且具有磨砂狀側端面之壓製成型用玻璃素材材料之截面圖。 Fig. 2 is a cross-sectional view of a glass material for press molding which has been centered and has a frosted side end surface.
第3圖係表示針對壓製成型用玻璃素材材料之側端面之研磨時間與表面粗糙度Ra2(第2表面粗糙度)之關係的圖表。 Fig. 3 is a graph showing the relationship between the polishing time and the surface roughness Ra2 (second surface roughness) of the side end faces of the glass material for press molding.
第4圖係表示一面為凸面、另一面為平坦面、且包括配置於凸面及平坦面之間之周圍之側端面之壓製成型用玻璃素材 的截面圖。 Fig. 4 is a view showing a glass material for press molding in which one surface is a convex surface and the other surface is a flat surface and includes a side end surface disposed between the convex surface and the flat surface. Sectional view.
第5圖係表示一面為凸面、另一面為凹面、且包括配置於凸面及凹面之間之周圍之側端面之壓製成型用玻璃素材的截面圖。 Fig. 5 is a cross-sectional view showing a glass material for press molding in which one surface is a convex surface and the other surface is a concave surface, and includes a side end surface disposed between the convex surface and the concave surface.
第6圖係說明壓製成型用玻璃素材材料之研磨工序之一例的示意性側面圖。 Fig. 6 is a schematic side view showing an example of a polishing process of a glass material for press molding.
以下，參照附圖對本發明之壓製成型用玻璃素材、壓製成型用玻璃素材之製造方法及光學元件之製造方法的一個實施形態進行詳細說明。 Hereinafter, one embodiment of the glass material for press molding, the method for producing a glass material for press molding, and the method for producing an optical element of the present invention will be described in detail with reference to the accompanying drawings.
本說明書中，“壓製成型用玻璃素材”主要係用於模壓成型之玻璃素材，指冷預成型件。冷預成型件係指經由定心加工等冷加工而形成的預成型體(preform)。又，“壓製成型用玻璃素材材料”係用於形成本說明書中的“壓製成型用玻璃素材”之前階段之冷預成型件，尤其係指經過定心加工且具有磨砂狀側端面之冷預成型件。除此之外，對於“壓製成型用玻璃素材材料”而言，其側端面比磨砂狀平坦，然而自本發明中作為課題的確保壓製成型後的光學元件之形狀精度之觀點出發，亦包括不適於壓製成型之冷預成型件。 In the present specification, the "glass material for press molding" is mainly used for the glass material for press molding, and refers to a cold preform. The cold preform refers to a preform formed by cold working such as centring processing. Moreover, the "glass material for press molding" is a cold preform which is used in the stage before the "glass material for press molding" in the present specification, and particularly refers to a cold preform which is centered and has a frosted side end face. Pieces. In addition, the "glass material for press molding" has a flat end surface which is flatter than a frosted surface. However, from the viewpoint of ensuring the shape accuracy of the optical element after press molding as a problem in the present invention, it also includes discomfort. For press forming cold preforms.
壓製成型用玻璃素材或壓製成型用玻璃素材材料之“側端面”不僅係指壓製成型用玻璃素材或壓製成型用玻璃素材材料之外周面，設置有倒角部之情況下亦包括該倒角部。 The "side end surface" of the glass material for press molding or the glass material for press molding means not only the outer surface of the glass material for press molding or the glass material for press molding, but also includes the chamfered portion when a chamfered portion is provided. .
“表面粗糙度Ra”係指基於2001年JIS標準B601之算術平均粗糙度。表面粗糙度Ra之測定可利用基於JIS標準之方法、使 用已知的測定裝置測定。 "Surface roughness Ra" means the arithmetic mean roughness based on JIS Standard B601 of 2001. The surface roughness Ra can be measured by a method based on the JIS standard. It is measured by a known measuring device.
(壓製成型用玻璃素材) (glass material for press molding)
第1圖係本實施形態之壓製成型用玻璃素材10之示意性側面圖。壓製成型用玻璃素材10包括表面粗糙度Ra為第1表面粗糙度Ra1之至少一個凸面10a、及配置於凸面10a之周圍且表面粗糙度Ra為第2表面粗糙度Ra2之側端面11，第2表面粗糙度Ra2小於0.10μm，並且，第2表面粗糙度Ra2大於第1表面粗糙度Ra1。 Fig. 1 is a schematic side view showing a glass material 10 for press molding of the present embodiment. The glass material 10 for press molding includes at least one convex surface 10a having a surface roughness Ra of the first surface roughness Ra1, and a side end surface 11 disposed at the periphery of the convex surface 10a and having a surface roughness Ra of the second surface roughness Ra2. The surface roughness Ra2 is less than 0.10 μm, and the second surface roughness Ra2 is larger than the first surface roughness Ra1.
又，壓製成型用玻璃素材10之側端面11由凸面10a之外邊緣向外側連續地設置。凸面10a可為球面形狀。對於壓製成型用玻璃素材10之形狀，作為示例，為彎月形凹狀。 Moreover, the side end surface 11 of the glass material 10 for press molding is continuously provided to the outer side from the outer edge of the convex surface 10a. The convex surface 10a may have a spherical shape. The shape of the glass material 10 for press molding is, for example, a meniscus concave shape.
進一步，如第1圖所示，壓製成型用玻璃素材10還包括連結面40，該連結面40配置於與凸面10a相反的面並連結於側端面11，可使連結面40之表面粗糙度Ra(以下簡稱為“表面粗糙度Ra3”)小於0.10μm。此外，於第1圖中，連結面40為平面形狀。 Further, as shown in Fig. 1, the glass material 10 for press molding further includes a joint surface 40 which is disposed on a surface opposite to the convex surface 10a and is coupled to the side end surface 11, so that the surface roughness Ra of the joint surface 40 can be made. (hereinafter referred to as "surface roughness Ra3") is less than 0.10 μm. Further, in Fig. 1, the connecting surface 40 has a planar shape.
此外，如上所述，側端面11包括壓製成型用玻璃素材10之外周面11a及其倒角部11b。 Further, as described above, the side end surface 11 includes the outer peripheral surface 11a of the press-molding glass material 10 and its chamfered portion 11b.
本實施形態中所使用的壓製成型用玻璃素材10例如為以硼酸及稀土元素氧化物為主要成分之硼酸鑭系玻璃。此外，本發明之壓製成型用玻璃素材之材料並不限於硼酸鑭系玻璃，例如可為以磷酸鹽為主要成分之磷酸鹽玻璃、以二氧化硅為主要成分之二氧化硅系玻璃。 The glass material 10 for press molding used in the present embodiment is, for example, barium borate-based glass containing boric acid and a rare earth element oxide as main components. In addition, the material of the glass material for press molding of the present invention is not limited to barium borate-based glass, and may be, for example, phosphate glass containing phosphate as a main component or silica-based glass containing silica as a main component.
自側端面之研磨加工性之觀點出發，對於本實施形態之壓製成型用玻璃素材10之物性而言，使用磨損度(FA)為 400以下的材料較佳。壓製成型用玻璃素材10之磨損度(FA)更佳為200以下、進而更佳為100以下。 From the viewpoint of the polishing processability of the side surface, the physical properties of the glass material 10 for press molding of the present embodiment are as follows. Materials below 400 are preferred. The degree of wear (FA) of the glass material 10 for press molding is more preferably 200 or less, still more preferably 100 or less.
同樣，自側端面之研磨加工性之觀點出發，本實施形態之壓製成型用玻璃素材10之羅普硬度(Knoop hardness number)較佳為400MPa以上。壓製成型用玻璃素材10之羅普硬度更佳為500MPa以上、進而更佳為600MPa以上。 Similarly, the Knoop hardness number of the glass material 10 for press molding of the present embodiment is preferably 400 MPa or more from the viewpoint of the polishing workability of the side surface. The glass material 10 for press molding preferably has a Rope hardness of 500 MPa or more, and more preferably 600 MPa or more.
此外，磨損度(FA)及羅普硬度藉由以下步驟求出。 磨損度(FA)如下算出：將測定面積為9cm2之試料保持於距每分鐘水平旋轉60次之鑄鐵製平面器皿中心80mm的恆定位置，每5分鐘固定供給於平均粒徑20μm之氧化鋁磨粒10g中添加了20ml水的拋光液，施加9.807N之負荷，進行拋光。又，稱量研磨前後的試料質量，求出磨損質量m，對於由日本光學硝子工業會制定的標準試料(BSC7)進行同樣測定而得到磨損質量m0，將上述磨損質量m及磨損質量m0代入下式，算出磨損度(FA)。 Further, the degree of wear (FA) and the hardness of Ropp were determined by the following procedures. The degree of wear (FA) was calculated as follows: The sample having a measurement area of 9 cm 2 was held at a constant position of 80 mm from the center of a cast iron plane vessel rotated 60 times per minute horizontally, and fixedly supplied to an alumina mill having an average particle diameter of 20 μm every 5 minutes. A polishing liquid of 20 ml of water was added to 10 g of the pellet, and a load of 9.807 N was applied to perform polishing. In addition, the mass of the sample before and after the polishing was weighed, and the wear mass m was determined. The standard sample (BSC7) prepared by the Japan Optical Glass Industry Association was measured in the same manner to obtain the wear mass m 0 , and the wear mass m and the wear mass m 0 were obtained. Substituting the following formula, the wear degree (FA) is calculated.
FA={(m/d)/(m0/d0)}×100 FA={(m/d)/(m 0 /d 0 )}×100
此處，d為試料之比重，d0為標準試料(BSC7)之比重。 Here, d is the specific gravity of the sample, and d 0 is the specific gravity of the standard sample (BSC7).
羅普硬度如下求出：於平面研磨後的玻璃面，以0.9807N之負荷壓下相對棱夾角為172°30’及130°的、橫截面呈菱形之金剛石四棱錐壓頭，上述壓下進行15秒，從而形成凹痕，測定所產生的永久凹痕之長邊之對角線的長度，藉由下式求出羅普硬度。 The Rope hardness is determined as follows: a diamond-shaped diamond pyramid indenter having a cross-section with a cross-section of 172°30' and 130° is pressed against a glass surface after plane grinding at a load of 0.9807 N. After 15 seconds, a dent was formed, and the length of the diagonal of the long side of the permanent dent obtained was measured, and the Rope hardness was obtained by the following formula.
Hk=1.451‧(F/l2) Hk=1.451‧(F/l 2 )
此處，F為負荷(N)、l為凹痕之長邊之對角線的長度(mm)。 Here, F is the load (N), and l is the length (mm) of the diagonal of the long side of the dent.
接著，關於壓製成型用玻璃素材10之側端面11之表面粗糙度Ra2及凸面10a之表面粗糙度Ra1與壓製成型得到的光學元件之形狀精度的關係，進行詳細說明。此處，壓製成型用玻璃素材材料10’之側端面11之表面粗糙度Ra2的調整、即平坦化藉由已知的研磨加工進行。 Next, the relationship between the surface roughness Ra2 of the side end surface 11 of the glass material 10 for press molding and the surface roughness Ra1 of the convex surface 10a and the shape accuracy of the optical element obtained by press molding will be described in detail. Here, the adjustment of the surface roughness Ra2 of the side end surface 11 of the glass material 10' for press molding, that is, the flattening is performed by a known polishing process.
第2圖係經過定心加工、且具有一個凸面10a’及配置於凸面10a’之周圍之磨砂狀側端面11’之壓製成型用玻璃素材材料10’的截面圖。對於壓製成型用玻璃素材材料10’之形狀而言，作為示例，為與第1圖同樣的彎月形凹狀。此外，於側端面11’之一端形成有倒角部11b。此外，第1圖及第2圖中，凸面10a及10a’之表面粗糙度Ra1相同。 Fig. 2 is a cross-sectional view of a glass material 10' for press molding which is centered and has a convex surface 10a' and a frosted side end surface 11' disposed around the convex surface 10a'. The shape of the glass material 10' for press molding is, for example, a meniscus concave shape similar to that of Fig. 1 . Further, a chamfered portion 11b is formed at one end of the side end surface 11'. Further, in Figs. 1 and 2, the convexities 10a and 10a' have the same surface roughness Ra1.
又，如第2圖所示，壓製成型用玻璃素材材料10’於凸面10a’之相反一面進一步包括連結於側端面11’之連結面40’。此外，於第2圖中，連結面40’為平面形狀。 Further, as shown in Fig. 2, the glass material 10' for press molding further includes a joint surface 40' joined to the side end surface 11' on the opposite side of the convex surface 10a'. Further, in Fig. 2, the connecting surface 40' has a planar shape.
第3圖係表示針對第2圖之壓製成型用玻璃素材材料10’之側端面11’之研磨時間與表面粗糙度Ra2(第2表面粗糙度)之關係的圖表。研磨時間為0~300s。此外，研磨時間0之Ra2意味著定心加工後的磨砂狀側端面之表面粗糙度。表面粗糙度Ra測定時的基準長度l為0.85mm。壓製成型用玻璃素材材料10’使用了硼酸鑭系玻璃。此外，表面粗糙度Ra之測定使用了Taylor Hobson社製造的Form Talysurf(類型名：Laser 635)。 Fig. 3 is a graph showing the relationship between the polishing time and the surface roughness Ra2 (second surface roughness) of the side end surface 11' of the glass material 10' for press molding of Fig. 2; The grinding time is 0~300s. Further, Ra2 of the grinding time 0 means the surface roughness of the frosted side end surface after the centering process. The reference length l at the time of measuring the surface roughness Ra was 0.85 mm. Barium borate-based glass is used for the glass material 10' for press molding. Further, the surface roughness Ra was measured using Form Talysurf (type name: Laser 635) manufactured by Taylor Hobson Co., Ltd.
如第3圖所示，關於側端面之表面粗糙度Ra2，研磨時間為120s以下的情況下，相對於研磨時間之増加顯示出緩慢的減少傾向，若研磨時間超過120s則急劇下降。又，140s以 上的情況下，小於0.10μm。與此相對應，若研磨時間超過120s、為140s以上，則目視觀察到側端面由霧面變化為光澤面。 As shown in Fig. 3, when the polishing time is 120 s or less with respect to the surface roughness Ra2 of the side end surface, it tends to decrease slowly with respect to the polishing time, and when the polishing time exceeds 120 s, it sharply decreases. Again, 140s In the case of the above, it is less than 0.10 μm. On the other hand, when the polishing time exceeds 120 s and is 140 s or more, the side end surface is visually observed to change from a matte surface to a glossy surface.
表1表示相對於各研磨時間的、側端面之表面粗糙度Ra2及對壓製成型用玻璃素材材料10’進行壓製成型而得到的光學元件之形狀精度的指標。表1之“光學元件之形狀精度”中，○表示光學性能上確保了充分的形狀精度之情況、×表示產生了形狀不良之情況。又，雖然未記載於表1，但壓製成型用玻璃素材10之凸面10a之表面粗糙度Ra1為0.0025μm。 Table 1 shows the surface roughness Ra2 of the side end surface and the shape accuracy of the optical element obtained by press-molding the glass material 10' for press molding with respect to each polishing time. In the "shape accuracy of the optical element" in Table 1, ○ indicates that sufficient shape accuracy is ensured in optical performance, and × indicates that shape defects have occurred. Further, although not shown in Table 1, the surface roughness Ra1 of the convex surface 10a of the glass material 10 for press molding is 0.0025 μm.
由第3圖及表1可知，自確保光學元件之形狀精度之觀點出發，較佳為，壓製成型用玻璃素材10之側端面11之表面粗糙度Ra2小於0.10μm，並且，表面粗糙度Ra2大於表面粗糙度Ra1。自進一步提高壓製成型後的光學元件之形狀精度之觀點出發，Ra2之上限更佳為對應於200s~300s之研磨時間的、小於0.020μm之表面粗糙度。 3 and the table 1, it is preferable that the surface roughness Ra2 of the side end surface 11 of the glass material 10 for press molding is less than 0.10 μm from the viewpoint of ensuring the shape accuracy of the optical element, and the surface roughness Ra2 is larger than Surface roughness Ra1. From the viewpoint of further improving the shape accuracy of the optical element after press molding, the upper limit of Ra2 is more preferably a surface roughness of less than 0.020 μm corresponding to a polishing time of 200 s to 300 s.
進一步，使用如第2圖所示的、包括配置於與凸面10a’相反的面且連結於側端面11’之連結面40’之壓製成型用玻璃素材材料10’之情況下，使連結面40’之表面粗糙度Ra3小於0.10μm較佳。其原因在於，使用包括此種連結面40’之壓製成型用玻璃素材材料10’之情況下，壓製成型時，除側端面11’ 之外，連結面40’有時亦捲入成型模具之成型面側而被壓制，構成壓製成型得到的光學元件之邊緣部。 Further, in the case of using the glass material 10' for press molding which is disposed on the surface opposite to the convex surface 10a' and is connected to the joint surface 40' of the side end surface 11' as shown in Fig. 2, the joint surface 40 is formed. It is preferable that the surface roughness Ra3 is less than 0.10 μm. The reason for this is that, in the case of using the glass material 10' for press molding including the joint surface 40', the side end surface 11' is removed at the time of press molding. In addition, the joint surface 40' may be wound into the molding surface side of the molding die and pressed to form the edge portion of the optical element obtained by press molding.
藉由分別使側端面11’之表面粗糙度Ra2及連結於側端面11’之連結面40’的表面粗糙度Ra3為0.10μm以下，能進一步有助於光學元件之表面精度的提高。又，自進一步提高光學元件之形狀精度之觀點出發，表面粗糙度Ra3小於0.020μm更佳。表面粗糙度Ra3之下限無特別限制，例如可為0、或為凸面10a’之表面粗糙度Ra1。此外，如第2圖所示，連結面40’呈平面形狀。 By setting the surface roughness Ra2 of the side end surface 11' and the surface roughness Ra3 of the connecting surface 40' connected to the side end surface 11' to 0.10 μm or less, the surface precision of the optical element can be further improved. Moreover, from the viewpoint of further improving the shape accuracy of the optical element, the surface roughness Ra3 is preferably less than 0.020 μm. The lower limit of the surface roughness Ra3 is not particularly limited and may be, for example, 0 or a surface roughness Ra1 of the convex surface 10a'. Further, as shown in Fig. 2, the joint surface 40' has a planar shape.
此外，本實施形態之壓製成型用玻璃素材材料10’使用了硼酸鑭系玻璃，但於磷酸鹽系玻璃、二氧化硅系玻璃等中，表面粗糙度Ra2、表面粗糙度Ra1及壓製成型後的光學元件之形狀精度之關係亦示出了與使用硼酸鑭系玻璃之情況同樣的結果。 In addition, in the glass material 10' for press molding of the present embodiment, barium borate-based glass is used, but in the phosphate-based glass, the silica-based glass, or the like, the surface roughness Ra2, the surface roughness Ra1, and the press-molded The relationship between the shape accuracy of the optical element also shows the same result as in the case of using barium borate-based glass.
進一步，本實施形態中，使用了彎月形凹狀的壓製成型用玻璃素材，但於一面及另一面之兩面皆為凸面的形狀、或一面為凸面另一面為平面的形狀等壓製成型用玻璃素材中，表面粗糙度Ra2、表面粗糙度Ra1及壓製成型後的光學元件之形狀精度之關係示出了與彎月形凹狀之壓製成型用玻璃素材同樣的結果。 Further, in the present embodiment, a glass material for press molding having a meniscus concave shape is used, but a glass for press molding such as a convex shape on one surface and the other surface or a flat surface on one surface and a flat surface are used. In the material, the relationship between the surface roughness Ra2, the surface roughness Ra1, and the shape accuracy of the optical element after press molding shows the same result as the meniscus-shaped glass material for press molding.
第4圖係表示一面為凸面20a、另一面為平坦面20b、且包括配置於凸面20a及平坦面20b之間之周圍之側端面21之壓製成型用玻璃素材20的截面圖。本發明之課題、即壓製成型得到的光學元件之形狀精度之惡化之程度存在依存於 (△h1/D1)的傾向，(△h1/D1)為壓製成型用玻璃素材20的、由中心軸O方向之凸面之頂點至外周端為止之距離△h相對於凸面20a的直徑D1之比。 4 is a cross-sectional view showing a glass material 20 for press molding including a convex surface 20a and a flat surface 20b on the other side and including a side end surface 21 disposed between the convex surface 20a and the flat surface 20b. The problem of the present invention, that is, the degree of deterioration of the shape accuracy of the optical element obtained by press molding depends on (Δh1/D1) is a ratio of the distance Δh from the apex of the convex surface in the direction of the central axis O to the outer peripheral end of the glass material 20 for press molding to the diameter D1 of the convex surface 20a. .
即，對該△h1/D1與壓製成型後的光學元件之形狀精度之關係進行調查，結果可知，本發明之課題於△h1/D1為0.15以上的情況下更容易顯現化。本發明更適合於凸面20a之△h1/D1為0.15以上的情況。△h1/D1之上限無特別限制，例如可為0.40。 In other words, the relationship between the Δh1/D1 and the shape accuracy of the optical element after press molding was examined. As a result, it is understood that the object of the present invention is more easily exhibited when Δh1/D1 is 0.15 or more. The present invention is more suitable for the case where the Δh1/D1 of the convex surface 20a is 0.15 or more. The upper limit of Δh1/D1 is not particularly limited and may be, for example, 0.40.
第5圖係表示一面為凸面30a、另一面為凹面30b、且包括配置於凸面30a及凹面30b之間之周圍之側端面31之壓製成型用玻璃素材30的截面圖。使用如第5圖所示的、一面具有凸面且另一面具有凹面之壓製成型用玻璃素材之情況下，本發明之課題具有進一步顯現的傾向。 Fig. 5 is a cross-sectional view showing a glass material 30 for press molding including a convex surface 30a and a concave surface 30b on the other side and including a side end surface 31 disposed between the convex surface 30a and the concave surface 30b. When the glass material for press molding which has a convex surface on one side and a concave surface on the other side as shown in Fig. 5 is used, the subject of the present invention tends to be further developed.
如第5圖所示的形狀之壓製成型用玻璃素材30之情況下，將該壓製成型用玻璃素材配置於下模之凹狀成型面上，使上模下降而對壓製成型用玻璃素材進行加壓，若想要使壓製成型用玻璃素材對應於上模之凸狀之成型面，則凸狀之成型面之中央部分率先與壓製成型用玻璃素材接觸。其原因在於，若於該狀態下持續加壓，則藉由由凸狀之成型面之頂部施加於壓製成型用玻璃素材的壓力，壓製成型用玻璃素材之外週邊緣向上方彎曲，與外周部及中央部之間之部分相比，壓製成型用玻璃素材之外周部率先與凸狀之成型面接觸。 In the case of the glass material 30 for press molding of the shape shown in Fig. 5, the glass material for press molding is placed on the concave molding surface of the lower mold, and the upper mold is lowered to add the glass material for press molding. When the glass material for press molding is desired to correspond to the convex molding surface of the upper mold, the central portion of the convex molding surface comes into contact with the glass material for press molding. The reason for this is that when the pressure is continuously applied in this state, the outer peripheral edge of the glass material for press molding is bent upward and the outer peripheral portion is pressed by the pressure applied to the glass material for press molding from the top of the convex molding surface. The outer peripheral portion of the glass material for press molding is brought into contact with the convex molding surface in comparison with the portion between the central portions.
即，使由壓製成型用玻璃素材20之中心軸O方向之凸面30a之頂點至外周端為止的距離△h2相對於凸面30a之直 徑D2之比(△h2/D2)、及凸面之曲率半徑R1相對於凹面之曲率半徑R2之比(R1/R2)系統性地變化，對壓製成型後的光學元件之形狀精度進行調整，結果可知，本發明之課題於△h2/D2為0.15以上、及R1/R2為1/4以上且2以下時進一步顯現化。 In other words, the distance Δh2 from the vertex of the convex surface 30a in the direction of the central axis O of the press molding glass material 20 to the outer peripheral end is made straight with respect to the convex surface 30a. The ratio of the diameter D2 (Δh2/D2) and the ratio of the radius of curvature R1 of the convex surface to the radius of curvature R2 of the concave surface (R1/R2) are systematically changed, and the shape accuracy of the optical element after press molding is adjusted. It is understood that the problem of the present invention is further exhibited when Δh2/D2 is 0.15 or more and R1/R2 is 1/4 or more and 2 or less.
本發明中，對於如第5圖所示的、一面具有凸面30a且另一面具有凹面30b之壓製成型用玻璃素材30而言，進一步適合於△h2/D1之比為0.15以上的情況、及R1/R2為1/4以上且2以下的情況。△h2/D2之上限無特別限制，例如可為0.40。 In the present invention, the glass material 30 for press molding having the convex surface 30a and the concave surface 30b on the other surface as shown in Fig. 5 is further suitable for the case where the ratio of Δh2/D1 is 0.15 or more and R1. /R2 is 1/4 or more and 2 or less. The upper limit of Δh2/D2 is not particularly limited and may be, for example, 0.40.
(壓製成型用玻璃素材之製造方法、及光學元件之製造方法)接著，關於本實施形態之壓製成型用玻璃素材10之製造方法，使用第6圖進行說明。第6圖係說明壓製成型用玻璃素材10之研磨工序之一例的示意性側面圖。 (Manufacturing Method of Glass Material for Press Forming and Method of Producing Optical Element) Next, a method of manufacturing the glass material 10 for press molding according to the present embodiment will be described with reference to FIG. Fig. 6 is a schematic side view showing an example of a polishing process of the glass material 10 for press molding.
本實施形態之製造方法包括下述工序：準備工序，其中，準備壓製成型用玻璃素材材料10’，該壓製成型用玻璃素材材料10’具有至少一個凸面10a’、及配置於凸面10a’之周圍且表面粗糙度Ra比凸面10a’之第1表面粗糙度Ra1大的側端面11’；以及研磨工序，其中，對側端面11’進行研磨，從而得到表面粗糙度Ra小於0.10μm、且大於凸面10a’之第1表面粗糙度Ra1之第2表面粗糙度Ra2。 The manufacturing method of the present embodiment includes a step of preparing a glass material 10' for press molding, the glass material 10' for press molding having at least one convex surface 10a' and being disposed around the convex surface 10a'. a side end surface 11' having a surface roughness Ra larger than the first surface roughness Ra1 of the convex surface 10a'; and a polishing step in which the opposite end surface 11' is polished to obtain a surface roughness Ra of less than 0.10 μm and larger than the convex surface The second surface roughness Ra2 of the first surface roughness Ra1 of 10a'.
本實施形態之壓製成型用玻璃素材10之製造方法中，首先準備如第2圖所示的壓製成型用玻璃素材材料10’，該壓製成型用玻璃素材材料10’具有至少一個凸面10a’、及配置於該凸面之周圍且表面粗糙度Ra大於凸面10a’之側端面11’(準備 工序)。此外，該壓製成型用玻璃素材材料10’為藉由已知的製造方法製造的冷預成型件。 In the method for producing the glass material 10 for press molding of the present embodiment, first, a glass material 10' for press molding as shown in Fig. 2 is prepared, and the glass material 10' for press molding has at least one convex surface 10a', and Arranged around the convex surface and having a surface roughness Ra greater than a side end surface 11' of the convex surface 10a' (preparation Process). Further, the glass material 10' for press molding is a cold preform produced by a known production method.
接著，進行研磨，使壓製成型用玻璃素材材料10’之側端面11’之表面粗糙度Ra為小於0.10μm、且大於凸面10a’之第1表面粗糙度Ra1之第2表面粗糙度Ra2(研磨工序)。 Then, the surface roughness Ra of the side end surface 11' of the glass material 10' for press molding is less than 0.10 μm, and is larger than the second surface roughness Ra2 of the first surface roughness Ra1 of the convex surface 10a' (grinding) Process).
如第6圖所示，將壓製成型用玻璃素材材料10’之凸面10a’側部分固定於能旋轉的壓製成型用玻璃素材材料固定用夾具14。接著，使安裝於墊固定用夾具16之研磨用墊12接觸於壓製成型用玻璃素材材料10’之側端面11’之狀態下，使壓製成型用玻璃素材材料固定用夾具14旋轉，使壓製成型用玻璃素材材料10’之側端面11’與研磨用墊12相對移動，對側端面11’進行研磨直至表面粗糙度為小於0.10μm、且大於凸面10a’之表面粗糙度Ra1之表面粗糙度Ra，從而得到本實施形態之壓製成型用玻璃素材10。此外，倒角部11b’之研磨可藉由使安裝於墊固定用夾具16之研磨用墊10d之面按照與倒角部10c之倒角角度對應的方式接觸從而同樣地進行。關於連結面40’的研磨，亦可利用同樣方法進行。 As shown in Fig. 6, the convex portion 10a' side portion of the press molding glass material 10' is fixed to a rotatable press-forming glass material fixing jig 14. Then, the polishing pad 12 attached to the pad fixing jig 16 is brought into contact with the side end surface 11' of the glass material 10' for press molding, and the glass material fixing jig 14 for press molding is rotated to press-form The side end surface 11' of the glass material 10' is moved relative to the polishing pad 12, and the opposite end surface 11' is polished until the surface roughness is less than 0.10 μm and is greater than the surface roughness Ra1 of the surface roughness Ra1 of the convex surface 10a'. Thus, the glass material 10 for press molding of this embodiment is obtained. Further, the polishing of the chamfered portion 11b' can be performed in the same manner by contacting the surface of the polishing pad 10d attached to the pad fixing jig 16 so as to correspond to the chamfer angle of the chamfered portion 10c. The polishing of the joint surface 40' can also be carried out by the same method.
壓製成型用玻璃素材材料10’之側端面11’被研磨，直至表面粗糙度Ra2為小於0.10μm未満、且大於凸面10a’之表面粗糙度Ra1之表面粗糙度Ra2為止。自進一步提高壓製成型後的光學元件之形狀精度之觀點出發，表面粗糙度Ra2之上限小於0.020μm更佳。 The side end surface 11' of the glass material 10' for press molding is polished until the surface roughness Ra2 is less than 0.10 μm and is larger than the surface roughness Ra2 of the surface roughness Ra1 of the convex surface 10a'. From the viewpoint of further improving the shape accuracy of the optical element after press molding, the upper limit of the surface roughness Ra2 is preferably less than 0.020 μm.
連結面40之表面粗糙度Ra3之上限按照小於0.10μm、小於0.020μm之順序較佳。表面粗糙度Ra3之下限無特 別限制，例如可為0、或為與凸面10a’之表面粗糙度Ra1相同的值。 The upper limit of the surface roughness Ra3 of the joint surface 40 is preferably in the order of less than 0.10 μm and less than 0.020 μm. The lower limit of surface roughness Ra3 is not special Further, it may be, for example, 0 or the same value as the surface roughness Ra1 of the convex surface 10a'.
此外，研磨用墊例如可使用樹脂製的墊，研磨劑例如可使用二氧化鈰。 Further, as the polishing pad, for example, a resin pad can be used, and for the polishing agent, for example, cerium oxide can be used.
提供了一種光學元件之製造方法，其包括使用壓製成型用玻璃素材10進行壓製成型之壓製成型工序。例如，使用成型模具對壓製成型用玻璃素材進行壓製成型，從而製造光學元件，該成型模具包括上模及下模等，該上模由SUS等具有耐熱性及耐腐蝕性的金屬形成、且具有凸狀之成型面，該下模具有凹狀之成型面。 There is provided a method of producing an optical element comprising a press forming process of press molding using a glass material 10 for press molding. For example, a glass material for press molding is press-molded using a molding die to manufacture an optical element including an upper mold and a lower mold, and the upper mold is formed of a metal having heat resistance and corrosion resistance such as SUS, and has A convex molding surface having a concave molding surface.
本實施形態中能使用的壓製成型用玻璃素材材料10’與(壓製成型用玻璃素材)中說明的材料相同。即，例如為硼酸鑭系玻璃、磷酸鹽系玻璃、二氧化硅系玻璃等。 The glass material 10' for press molding which can be used in the present embodiment is the same as the material described in (glass material for press molding). That is, for example, barium borate-based glass, phosphate-based glass, silica-based glass, or the like.
又，關於壓製成型用玻璃素材材料10’之較佳物性(磨損度(FA)、羅普硬度)，亦與(壓製成型用玻璃素材)說明的內容同樣。即，自側端面之研磨加工性之觀點出發，壓製成型用玻璃素材材料10’之磨損度(FA)較佳為400以下、更佳為200以下、進而更佳為100以下。自側端面之研磨加工性之觀點出發，壓製成型用玻璃素材材料10’之羅普硬度較佳為400MPa以上、更佳為500MPa以上、進而更佳為600MPa以上。 Further, the preferable physical properties (wear degree (FA), Rope hardness) of the glass material 10' for press molding are also the same as those described for (glass material for press molding). In other words, the degree of wear (FA) of the glass material 10' for press molding is preferably 400 or less, more preferably 200 or less, still more preferably 100 or less, from the viewpoint of the polishing workability of the side surface. From the viewpoint of the polishing workability of the side surface, the glass material 10' for press molding preferably has a Rockwell hardness of 400 MPa or more, more preferably 500 MPa or more, and still more preferably 600 MPa or more.
壓製成型用玻璃素材10中，使側端面11之表面粗糙度Ra小於0.10μm，故於壓製成型中，鄰接於凸面10a’之側端面11之端部捲入成型模具之成型面側，構成壓製成型得到的光學元件得邊緣部，該情況下，亦不會損害壓製成型得到的光學 元件之形狀精度，能以低成本得到具有所期望的光學性能之光學元件。 In the glass material 10 for press molding, the surface roughness Ra of the side end surface 11 is less than 0.10 μm. Therefore, in the press molding, the end portion of the side end surface 11 adjacent to the convex surface 10a' is wound into the molding surface side of the molding die to constitute a press. The formed optical component has an edge portion, and in this case, the optical obtained by press molding is not impaired. The shape accuracy of the element enables an optical element having desired optical performance to be obtained at low cost.
以下，參照附圖對本發明進行總結。壓製成型用玻璃素材10包括表面粗糙度Ra為第1表面粗糙度Ra1之至少一個凸面10a、及配置於凸面10a之周圍且表面粗糙度Ra為第2表面粗糙度Ra2之側端面11，第2表面粗糙度Ra2小於0.10μm，並且，第2表面粗糙度Ra2大於第1表面粗糙度Ra1。 Hereinafter, the present invention will be summarized with reference to the accompanying drawings. The glass material 10 for press molding includes at least one convex surface 10a having a surface roughness Ra of the first surface roughness Ra1, and a side end surface 11 disposed at the periphery of the convex surface 10a and having a surface roughness Ra of the second surface roughness Ra2. The surface roughness Ra2 is less than 0.10 μm, and the second surface roughness Ra2 is larger than the first surface roughness Ra1.
又，壓製成型用玻璃素材10之製造方法包括下述工序：準備工序，其中，準備壓製成型用玻璃素材材料10’，該壓製成型用玻璃素材材料10’具有至少一個凸面10a’、及配置於凸面10a’之周圍且表面粗糙度Ra比凸面10a’之第1表面粗糙度Ra1大的側端面11’；以及研磨工序，其中，進行研磨，從而使側端面11’之表面粗糙度小於0.10μm、且為大於凸面10a’之第1表面粗糙度Ra1之第2表面粗糙度Ra2。 Further, the method for producing a glass material 10 for press molding includes a step of preparing a glass material 10' for press molding, the glass material 10' for press molding having at least one convex surface 10a', and a side end surface 11' around the convex surface 10a' and having a surface roughness Ra larger than the first surface roughness Ra1 of the convex surface 10a'; and a polishing step in which the surface roughness of the side end surface 11' is less than 0.10 μm Further, it is larger than the second surface roughness Ra2 of the first surface roughness Ra1 of the convex surface 10a'.
10‧‧‧壓製成型用玻璃素材 10‧‧‧Compressed glass material
10a‧‧‧凸面 10a‧‧‧ convex
11‧‧‧側端面 11‧‧‧ side end face
11a‧‧‧外周面 11a‧‧‧ outer perimeter
11b‧‧‧倒角部 11b‧‧‧Chamfering
40‧‧‧連結面 40‧‧‧Links
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| EP3482253B1 (en) | 2016-07-05 | 2021-05-05 | Corning Incorporated | Cold-formed glass article and assembly process thereof |
| US11384001B2 (en) | 2016-10-25 | 2022-07-12 | Corning Incorporated | Cold-form glass lamination to a display |
| US10712850B2 (en) | 2017-01-03 | 2020-07-14 | Corning Incorporated | Vehicle interior systems having a curved cover glass and a display or touch panel and methods for forming the same |
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| US11016590B2 (en) | 2017-01-03 | 2021-05-25 | Corning Incorporated | Vehicle interior systems having a curved cover glass and display or touch panel and methods for forming the same |
| KR102558993B1 (en) | 2017-05-15 | 2023-07-24 | 코닝 인코포레이티드 | Contoured glassware and its manufacturing method |
| CN117962601A (en) | 2017-07-18 | 2024-05-03 | 康宁公司 | Cold forming of complex curved glass articles |
| WO2019055469A1 (en) | 2017-09-12 | 2019-03-21 | Corning Incorporated | Deadfront for displays including a touch panel on decorative glass and related methods |
| US11065960B2 (en) | 2017-09-13 | 2021-07-20 | Corning Incorporated | Curved vehicle displays |
| TW202340816A (en) | 2017-09-13 | 2023-10-16 | 美商康寧公司 | Light guide-based deadfront for display, related methods and vehicle interior systems |
| US11745588B2 (en) | 2017-10-10 | 2023-09-05 | Corning Incorporated | Vehicle interior systems having a curved cover glass with improved reliability and methods for forming the same |
| CN111758063B (en) | 2017-11-21 | 2022-08-09 | 康宁公司 | Aspherical mirror for head-up display system and forming method thereof |
| WO2019108015A2 (en) | 2017-11-30 | 2019-06-06 | Corning Precision Materials Co., Ltd. | Vacuum mold apparatus, systems, and methods for forming curved mirrors |
| KR20200084360A (en) | 2017-11-30 | 2020-07-10 | 코닝 인코포레이티드 | Systems and methods for vacuum forming aspherical mirrors |
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| JP6805217B2 (en) * | 2018-10-18 | 2020-12-23 | Ｊｘ金属株式会社 | Conductive materials, molded products and electronic components |
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