Special-shaped high-precision optical double-glued lens processing process

Abstract

The invention discloses a special-shaped high-precision optical double-glued lens processing process. The process includes the following steps: (1) a step of milling, namely a step of cutting glass byusing a diamond pellet to meet required radius and thickness requirements; (2) a step of fine grinding, namely a step of improving the radius, roughness and surface precision of a workpiece to lay afoundation for polishing; (3) a step of polishing, namely a step of using grinding power to refine the surface shape to ensure that the surface shape, size and appearance requirements required by a drawing are met; and (4) a step of cleaning, namely a step of selecting an appropriate lotion and ultrasonic frequency to remove a grinding power impurity on the surface of a lens. The special-shaped high-precision optical double-glued lens processing process effectively solves the process and operation difficulty of double-sided or single-sided square lens gluing processing, realizes the productionof the square glued lens, breaks the limitation of a conventional process, realizes the batch and high-quality production of specific products.

Description

technical field [0001] The invention belongs to the technical field of optical component manufacturing, and in particular relates to a special-shaped high-precision optical doublet lens processing technology. Background technique [0002] In the design of the optical system, the projection ratio of the display chip is different. For example, the transmittance ratio of some chips is 2:1 or other ratios. At this time, it is necessary to cut and intercept the lens to ensure the symmetrical distribution of light on the lens; At the same time, it also contributes to the light weight and portability of optical equipment. The cutting of a single lens is relatively common, and the processing is not difficult. However, in order to pursue excellent imaging performance in optical design, it is necessary to design lenses of different specifications, and adjust the focal length to compensate for aberrations in the optical path; lenses with a large center thickness and small side thickne...

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Problems solved by technology

At the same time, lens bonding can also achieve the purpose of eliminating spherical aberration and chromatic aberration, reducing light energy loss, and obtaining better imaging quality. However, for a square-cut cemented lens, the processing difficulty far exceeds that of a single lens, and there are technical difficulties. There are: ① It needs to be glued first and then cored to ensure the eccentricity and symmetry of the finished product; while the traditional processing process is: blank→milling→finishing→grinding→coring→coating→gluing; no technical solutions can be used for reference; ② During gluing, the photosensitive glue bonding the lens during the curing process will generate stress due to shrinkage, and the stress will gradually increase from the center to the edge; the edge of the lens is cut when cored, the cutting speed and the heat generated affect the bonding strength of the glue layer, and there is The risk of glue opening; ③The cured glue is easy to passivate the whetstone when taking the core, resulting in a decrease in the cutting force of the whetstone, and the edge of the lens is easy to be damaged; ④The cleaning process of the glued lens after the core is different from that of the single lens, and the effect of the temperature of the lotion on the glue layer needs to be considered. Intensity of influence

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