The processing of optical lenses plays a key role in the precision design of the photoelectric enterprise instruments. The benefiting optical lens is made of high quality material of optical level by cold machining and polishing. For spherical aspheric optical lenses, the inspection methods can be roughly divided into contact type and non-contact detection. Lenses only need to improve their external conditions during processing.
In the process of polishing, it is possible because the acid and alkali of the polishing liquid or the continuation of the polishing liquid used for polishing liquid is alkaline. In view of the fact that the focus eccentricity detection technology can not detect diffused lenses, compared with the existing technology, it can provide fast detection of optical lens eccentricity and tilt, and for high productivity plastics, it is shot out of glass mold line detection.
The inspection link of optical lenses is very important. For optical lenses that can not reach the definition of the target, we will do repair or scrap processing. At the same time, the test piece is rotated on the precision platform and the dynamic deviation of its focus is detected. In view of the fact that the focus eccentricity detection technology is not able to detect diffused lenses, the optical glass lens of Xiamen center has developed polarization optical detection method by using automatic optical inspection and image processing techniques.
Antireflective coatings on the interference of light based, two groups of light propagation along the same path, the synthetic amplitude depends on phase difference and two wave crest to crest coincide, and strengthen each other, if the two waves are just half wavelength is the peak and trough of phase and amplitude offset each other, synthesis zero. Antireflective coatings is to ensure that the incident light at the interface of air and lens and light reflection coating in the coating and the lens interface the phase difference is exactly equal to the wavelength of 1/2.
To sum up, anti corrosion protection and detection of coated lens aspheric optical lens is a very important link, protective measures in optical glass polishing process based on the above discussion, optical glass corrosion degree, can be summarized as: the composition and structure of optical glass, the chemical stability of glass material itself and the environment at that time, is in contact with water, acid, alkali and other media of these two major factors. To change the structure of optical glass to improve its physical and chemical properties, it is bound to affect the optical properties of the glass, which will lose the practical significance of the use of such glass.