Eccentricity Control Method for Mass Production of Cemented Lenses

Abstract

The present application relates to the technical field of optical parts processing, in particular to an eccentricity control method for mass production of cemented lenses. The method includes the following steps: calculating the eccentricity influence value according to the design focal length and design outer diameter tolerance of the cemented lens; judging whether the eccentricity influence value is smaller than the eccentricity influence threshold; if the eccentricity influence value is smaller than the eccentricity influence threshold, then according to The normal processing flow produces the current batch; if the eccentricity influence value is greater than the eccentricity influence threshold, it is further judged whether the design outer diameter tolerance of the cemented lens is greater than the outer diameter tolerance threshold; if the design outer diameter tolerance is greater than the outer diameter tolerance threshold, then Perform parameter adjustment and processing on the current batch; if the design outer diameter tolerance is less than or equal to the outer diameter tolerance threshold value, perform step-by-step processing on the current batch. The method can effectively control the eccentric index of the finished product in the process of mass producing the cemented lens, and improve the rate of finished product and production efficiency.

Description

technical field [0001] The present application relates to the technical field of optical parts processing, in particular to an eccentricity control method for mass production of cemented lenses. Background technique [0002] In the field of optical parts processing, a cemented lens refers to a lens made of two or more materials with different refractive indices that are glued together to overcome the imaging defects of a single lens and the condition of less adjustable variables. After the combination of the two lenses is adopted, the adjustable variable increases, thereby improving the imaging quality of the objective lens. At the same time, the cemented lens can also achieve the purpose of eliminating spherical aberration and chromatic aberration and reducing the loss of light energy. At present, the cemented lens has been widely used in astronomical telescopes and cameras. [0003] Since the cemented lens is made of a reference film and a correction film, the current pro...

AI Technical Summary

Problems solved by technology

[0004] Although the single pieces used for gluing meet the design and processing specifications, the following problems often exist in the process of batch cemented lens processing and production: 1. Some lenses have poor eccentricity stability, and the eccentricity varies from time to time, resulting in irregular gluing operations; 2. The calibration points of the cemented lens are inconsistent, and the cemented lens cannot be adjusted to a qualified eccentric value. It is necessary to readjust the parameters of the eccentric fixture before gluing. Frequent and irregular adjustments in batch processing lead to extremely low production efficiency

The reason for the above situation is mainly caused by the individual differences in the focal length and outer diameter tolerance of the single lens in the same batch. The outer diameter tolerance of the first sample reference film will cause the geometric axis of the lens to be inconsistent after the rotation of the same eccentric fixture. Therefore, in the batch glue correction process using the eccentricity jig after the parameters of the first sample are set, the difference in eccentricity correction points between the lenses is different, resulting in poor eccentricity after rotation correction

Images