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The patent name: an optical lens grinding method and the device manufacturing method

by:ChangHui     2020-06-21
Technology: the invention relates to a kind of optical lens, especially not spherical lens grinding processing method and device. Technical background, the function of the optical instrument is to expand the human visual ability, change the nature to light. Optical system is the core part of optical instruments, consists of surface lens and the plane of the lens, the lens and lens as precision optical components must be approved by grinding and forming. Existing for processing surface lens grinding methods for 'r', it is by a ( Round) Spherical high-speed rotating with the lens of a millstone around the place to heart, because there are countless root spherical symmetric axis, so the 'r', can well fulfill the task of spherical lens processing, this processing performance of the good is the spherical lens is widely used for a long time. However, 'the study' method of machining aspheric lens is powerless. In terms of optical system imaging quality, the spherical lens ( The lens) On the convergence and divergence of character is not very ideal, there is still some bad and the influence of factors, one of which is the 'poor'. Compared with spherical lens, aspherical lens in the optical system is that the advantages of different position can be spherical aberration correction system, battery, such as astigmatism aberration, improve the clarity of imaging; It can reduce the number of parts of the whole system, reduce the energy loss; It can also reduce system size, thereby saving a lot of materials and artificial, in improving the quality of imaging at the same time reduce the cost. Aspheric lens surface, however, is a high time surface, usually only one root axis of symmetry, surface curvature radius of each part, so can't like spherical lens processing with the method of the 'r'. At present, there has been some aspheric lens processing methods, such as form grinding method, the contour grinding method, compression molding, etc. , but these processing methods are not low machining efficiency, is the processing equipments are too expensive, not to the industrialized production and processing of aspheric lens makes high precision aspheric optics has not yet been widely used. Of the technical scheme of the invention grinding method for processed lens fastening on the fixture, making them on, and by processing the lens and clamp can rotate around its own axis; Corresponds to the fixture setup mill, mill wheel runs shape or circular trough or circumferential grooved grooving, grooving section contour and the corresponding to the surface of the lens processed contour; Grooving in the injection of abrasives, lens forming slot into a millstone, make the axis of the fixture is consistent with the grooving of symmetry axis; Corresponds to the forming slot, mill and lens relative to the straight line reciprocating run, or circular arc reciprocating run, or circular operation, at the same time, the lens rotates around its own axis and the axial feed, thus to make the lens with the mill to grind, until the lens surface profile and grooving contour, lens grinding processing is completed. Described according to the above scheme, grooving section contour and the processing of mirror surface profile can be the same, or for the super half surface contour; Referred to the axis of the fixture and grooving of symmetry axis coincidence; Made of different material forming slot and abrasives, can be respectively suitable for lens grinding and polishing. Of the technical scheme of the invention grinding device for including mill and fixture, the difference between a millstone runs and processed on the surface of the lens profile corresponding grooving, the axis of the fixture is consistent with the axis symmetry grooving, mill with a rotating or reciprocating driving device is connected, fixture and feeding device is connected. According to the above scheme, grooving set corresponds to a millstone knife rack, install knife on the shelf with a knife; Described the forming slot for shape or circular trough or circumferential grooved; Described the feeding device for rotating feed device. Beneficial effects of this invention is to 1, provides a reliable and effective grinding processing method and device of two aspherical lenses, processing method and device of the present invention is simple, low production cost, mass, industrial scale production, and can be used to completely solve the long-standing optical instrument in a difficult technical problem to machining aspheric lens; 3, the present invention can also be used to produce spherical lens. In full the present invention relates to a kind of optical lens, especially not spherical lens grinding processing method and device. It will be processed lens fastening on the fixture, corresponding to the fixture setup mill, mill wheel runs shape or circular trough or circumferential grooved grooving, grooving section contour and the corresponding to the surface of the lens processed contour; Grooving in the injection of abrasives, lens forming slot into a millstone, make the axis of the fixture is consistent with the grooving of symmetry axis; Corresponds to the forming slot, mill and lens relative to the straight line reciprocating run, or circular arc reciprocating run, or circular operation, at the same time, the lens around its own axis rotation and axial feeding, until the lens surface profile and grooving contour, lens grinding processing is completed. Processing method and device of the present invention is simple, low production cost, mass, industrial scale production, and can be used to completely solve the long-standing optical instrument in a difficult technical problem to machining aspheric lens.
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