Method and apparatus for manufacturing optical element
A technology for optical components and manufacturing methods, which is applied to manufacturing tools, glass pressing, glass manufacturing equipment, etc., and can solve the problem of the axis deviation of the outer diameter central axis and the forming surface, and the difficulty of the outer diameter central axis and the axis of the forming surface being consistent. , can not be corrected and other problems, to achieve the effect of ensuring eccentricity accuracy and high eccentricity accuracy
Inactive Publication Date: 2013-04-24
KONICA MINOLTA OPTO
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Problems solved by technology
[0012] Moreover, in the processing of the forming die, it is difficult to make the outer diameter central axis of the forming die coincide completely with the axis of the forming surface, and usually there are many cases where the outer diameter central axis and the axis of the forming surface have a certain degree of deviation.
The method described in Patent Document 2 is a method of pressurizing the upper and lower molding dies from the side to align the central axis of the outer diameter. Can't fix it
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[0041] Below, combine Figure 1 to Figure 10 Embodiments of the present invention will be described in detail.
[0042] (Optical element manufacturing equipment)
[0043] First, combine Figure 1 ~ Figure 4 The structure of the manufacturing apparatus 10 of the optical element of this invention is demonstrated. figure 1 and figure 2 It is a figure which schematically shows the manufacturing apparatus 10 of the optical element of this invention, figure 1 Indicates the state in the dropping process, figure 2 Indicates the state during the pressurization process. also, image 3 is a perspective view near the lower die 12, Figure 4 It is an A-A sectional view of the upper mold base 16.
[0044] The molding die 13 for pressure molding the molten glass drop 20 has an upper die 11 and a lower die 12, the upper die 11 is supported on the lower surface of the upper die base 16, and the lower die 12 is supported on the upper face of the lower die base 17. surface. The upp...
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Abstract
Provided are a method and an apparatus for manufacturing an optical element, by which high eccentricity accuracy is ensured, in the case of manufacturing the optical element having two facing optical surfaces by a droplet forming method. The method is provided with a heating step of heating a molding die to a prescribed temperature, a dropping step of dropping a molten glass droplet to a lower die, and a pressurization step of forming the optical element by relatively moving an upper die and the lower die in a pressurizing direction and applying pressure to the molten glass droplet. Based on the positional shift quantity of the two optical surfaces of the optical element formed in the pressurization step, at least the relative position or inclination of the upper die and the lower die in the horizontal direction in the pressurization step is adjusted.
Description
technical field [0001] This invention relates to the manufacturing method of the optical element which press-moldes a droplet of molten glass, and manufactures the optical element which has two optical surfaces which oppose, and the manufacturing apparatus of the optical element for carrying out this manufacturing method. Background technique [0002] In recent years, optical elements produced by press-molding glass raw materials with molding dies have been used as lenses for digital cameras, optical pickup lenses such as DVDs, camera lenses for mobile phones, coupling lenses for optical communication, and used for semiconductor lasers. The elliptical shape of the output beam is shaped into a circular beam shaping element and the like, and is widely used. [0003] In addition, with the miniaturization and high-precision requirements of optical products, the performance required for optical elements made of glass is also getting higher and higher. For the relative position of...
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IPC IPC(8): C03B11/16
CPCC03B11/08C03B2215/46C03B2215/404C03B2215/60C03B11/16
Inventor 坂田忠文小川洋一釜田善浩虫明信雄多田一成
Owner KONICA MINOLTA OPTO