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The present invention is a kind of optical lens manufacturing methods, especially a manufacturing method of optical lens with air gap

by:ChangHui     2020-05-30
Technical background: nowadays more and more high to the requirement of optical lens imaging quality, so in order to let the optics lens imaging quality is improved, the existing technology in the flange area of the lens ( The lens of optical outer ring of the outside of the valid area) Making concave and convex structure, so as to fit each other in lens and lens produced by the internal space of the air can be through the concave-convex structure to the discharging. Ran to form concave-convex structure in the flange area of the lens, which required in the corresponding position in the traditional lens mould sand blasting or discharge method first made form uneven surface, and then in the lens manufacturing process will be the uneven surface of the pattern on the flange area of heat transfer to the lens, to form a concave and convex structure is required to improve the quality of the lens imaging. But, using the traditional sand blasting or discharge method of uneven quality of the surface is very big, the uneven surface of each sag depth and the height of each projecting part are not under precise control. In addition, due to the use of sand blasting or discharge method to make the uneven surface of the tolerance is bigger, also hard to achieve tolerance under 2 to 3 mu mu m m, caused by the lens mould manufacturing of lens at the time of their mutual joint formed by air interval structure size difference is big, air interval are unable to reach the present stage of lenses must control in 1 u m the following requirements, cause optical lens after assembly directly affect the imaging quality of the optical lens, so lead to poor yield of existing optical lens. Technical implementation elements: in light of the existing technology of the shortcomings and deficiencies, at this stage need a can accurately control the lens mold on the surface of the lens mold processing method, it can drastically reducing the concave-convex structure surface tolerance of lens of flange area, so as to effectively control the lens with lens formed by the joint between the structure of the air gap size, and improve the optical lens production yield, provides the optical lens with better imaging quality. To achieve the purpose of the invention, the invention adopted by the technical means to provide a kind of optical lens with air interval manufacturing method, wherein the method includes: in a lens mold for laser engraving form at least one in addition to the material area, the lens mold consists of a base and a top surface, referred to at least one in addition to the material area formed in the top surface; Again in the lens mold on the ceiling to form a lens material, thus forming a optical lenses, and for the optical lens and the at least one in addition to the material area formed on the corresponding position of the lens by area. The advantages of the present invention is the use of laser in laser engraving way to laser processing of lens mold, in order to form in addition to the expected area, and by the depth of the laser engraving can be precise control in addition to the material area, help to control each material area between tolerance in 0. Between 5 microns to 1 microns, and then makes use of the lens of optical glass lens bearing making mould by the district also has little tolerance features, thus effective control of the lens and lens joint formed by the air gap between the structure, size and improve the optical lens production yield poor problem. Better, has the top surface of a plane of the lens mold department and a concave part, described at least one in addition to the material area formed in the plane or inside the concave part of the end face of one of them or their combination. Mentioned in the maker can choose in addition to the formation of the material area location, and in accordance with the requirements will be described in addition to the material area only set on the top flat or concave department within the top surface, you can even set up in the plane of the top and at the same time inside concave. Better, as described in the at least one in addition to the material area formed in the plane within the department and the concave part of the end face, the plane in addition to the material area and the concave part in addition to the material in areas connected to the corresponding position. Better, at least one in addition to the amount of material area for three, and the interval. Here in addition to the material area is not in accordance with the limit for the number of the present invention with only in addition to the material area by 3 as an example, the number of its also can be set to number more or less in addition to the material area. Figure 1 illustrated instructions for the invention of the first implementation example of the lens mold three-dimensional appearance figure. Figure 2 for the use of the present invention in the first example of lens mould manufacturing form two fit each other with air side profile of interval of optical lenses. Figure 3 for the invention of the second implementation example of the lens mold three-dimensional appearance figure. Figure 4 for the use of the present invention in the second example of lens mould manufacturing formation of the two fit each other have air interval of optical lens side profile. Figure 5 for the invention of the third implementation example of the lens mold three-dimensional appearance figure. Figure 6 for the use of the present invention, the third implementation example of the lens mould manufacturing formation of the two fit each other have air interval of optical lens side profile.
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