An optical lens consists of several groups of lenses. How is the optical lens made?

Optical lens is composed of multiple groups of lenses, which is an essential part of camera projection and microscope. So how are optical lenses made?

Firstly, a large piece of optical glass is cut with a diamond saw blade, and then a number of glass discs the size of ice hockey are drilled on each glass sheet with a drill. Operators will try to reduce the waste of raw materials, because the price per kilogram of glass is one month's salary. In the process of drilling, the glass plate can be easily taken out, and then the thin glass lamp is waxed and pulled down to melt Guangxu glass. Then put the glass plate on the rotating turntable, and then polish the shape of the lens with the roller above the turntable. After the lens is polished, the operator should check whether there is any residual debris on the lens, then wrap a circle of adhesive tape around the edge of the lens and pour asphalt on the surface of the lens, that is, coat the bottom layer of the lens. Next, put the lens soaked with multi-layer asphalt into a metal bowl, then take the heated aluminum out of its original position and press it on the asphalt-coated lens. After the asphalt melts, cool it with glue to harden the asphalt, fix the lens on the original pestle, and then turn the original storage upside down as the base.

Secondly, the worker will cover the lens with a polishing tool containing a lubricant containing abrasive components, and the tool will swing back and forth for one hour with the rotation of the base. This step can make the lens smooth and transparent, and at the same time produce a larger cambered surface. After the polished lens is taken out, it is necessary to cut the lens into the required size, immediately align the center of the lens with two sets of brass tips through a microscope, then cut the lens with a diamond saw blade, and then put some of the cut lenses on the shelf of the vacuum chamber. After the door is closed, the electron beam in the vacuum chamber will evaporate, and the vapor of the coating material will form a protective film on the lens, and the state of the vapor and coating will be monitored by the computer.

After three or three hours, remove the coated lens, and then wipe off the residue on the lens surface. This shot is concave mirror. After covering the lens with a plastic cup, continue to check and clean the convex mirror of the other lens. Then put the convex mirror under the microscope, and adjust the position of the lens through the microscope until the optical center is aligned. Then the technician lowers the periphery of the lens to prevent the lens from sliding, and then wipes the lens. This must be guaranteed. Next, in front of the mirror, the mirror should be spotless. After the convex mirror is cleaned, the technician drops the optical glue in the center of the mirror, carefully checks the concave mirror again, and after confirming that there is no dust, sticks the concave mirror on the convex mirror, and then applies pressure on the lens to make the glue spread between the two lenses. When will you check it again and optically correct this set of double-layer lenses through the microscope?

Fourthly, the next step is to put the lens into the lens barrel. Technicians first use the engraving needle to engrave the lens information on the lens barrel, and then put this independent lens into the lens barrel, followed by lenses with various curvatures and sizes, and insert metal gaskets between the lenses, so that there is an appropriate lens spacing between the lenses, which can avoid the blurring of the next picture. Even if you carefully put the last lens in the bucket with tweezers, then install the fixing ring, fix the whole stack of lenses and lock the cover, and finally cut the optical lenses into various angles and insert them, a perfect optical lens will be finished.