Online automatic optical performance detecting and lens screening method

Abstract

The invention discloses an online automatic optical performance detecting and lens screening method. According to the method, real-time online detection of the yellowness of spectacle lenses on a flow production line can be realized, and real-time screening work can be carried out on unqualified products. According to the method, a detector is adopted for one-time wide spectrum collection, and the detection time is greatly shortened. According to the method, a transmission mode and a reflection mode are matched to measure the yellowness of the spectacle lenses, so that the reliability and the accuracy are improved. According to the method, a lighting source adopts a light homogenizing device for light homogenizing, and meanwhile, a pulse type lighting mode is adopted, so that the measurement accuracy can be improved. According to the method, the unqualified products can be automatically screened out, the manpower is greatly saved, and meanwhile, if many unqualified products exist in the production line, an alarm can be given in time to warn that the percent of pass of products in the batch is low, and the quality of raw materials is required to be checked or machining technological parameters are required to be optimized in time.

Description

technical field [0001] The invention relates to the field of spectacle lens detection, in particular to an online automatic optical performance detection and lens screening method. Background technique [0002] China is known as the "Kingdom of Glasses" in the world. According to the research report of the World Health Organization, the myopia population in China has exceeded 600 million, accounting for nearly half of China's population. The myopia rate of high school students and college students has exceeded 70%, and the myopia rate of primary school students is also close to 50%. China is one of the countries with the highest incidence of myopia in the world. [0003] The quality of glasses directly affects the health of eyesight. Therefore, the national quality supervision department lists measuring equipment such as lens meters, optometry lenses and optometry machines as measuring instruments for compulsory verification. The country has also issued a series of nation...

AI Technical Summary

Problems solved by technology

These devices are difficult to detect transparent ophthalmic lenses with certain concave and convex surfaces

[0009] (2) The traditional detection process requires steps such as spectrometry, and the measurement time for a single sample is long, which cannot adapt to the modern assembly line production mode of ophthalmic lenses

[0010] (3) Due to the characteristics of the spectacle lens itself and the influence of the production environment, the influence of stray light in the background of the measurement of yellowness is particularly obvious, and the traditional detection method cannot adapt to the real-time online detection application scene, and the reliability and accuracy are greatly reduced.

[0011] (4) Traditional testing cannot screen unqualified products in real time, requiring a lot of manpower and material resources, which is time-consuming and laborious, which is not conducive to the modern production process

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