Manufacturing apparatus of prefabricated rod for optical element blank, and method for manufacturing element blank

Abstract

The invention relates to a manufacturing apparatus of a prefabricated rod for an optical element blank, and a method for manufacturing the element blank, and belongs to the technical field of opticalglasses. The problem of restriction of the shape of a raw material in the processing process of the optical element is mainly solved in the invention. The apparatus is mainly characterized in that theapparatus comprises a molding die, a first drawing device, a second drawing device, a heating device and a cutting device; the first drawing device is located below the molding device, and is used for molding glass to form a circular thick rod; the heating device is located below the first drawing device, and is used for heating and softening the circular thick rod; the second drawing device is located below the heating device, and is used for drawing the circular thick rod to form a circular thin rod; and the cutting device is located below the second drawing device, and is used for cuttingthe circular thin rod. The circular rod can be directly manufactured during manufacturing of the optical glass, and the shape of the cross section of the circular rod approaches the needed shape of the cross section of the optical element, so the circular rod can be directly sliced to manufacture the optical element blank.

Description

technical field [0001] The invention belongs to the technical field of optical glass, and in particular relates to a manufacturing device for an optical glass rod used for cutting blank sheets of optical elements and a method for manufacturing optical element blanks. Background technique [0002] There are two methods of manufacturing optical glass element blanks: the first method is the pressing method, the second method is the slicing method, the slicing method is to use glass sheets to make round rods through multiple processes, and then slice the round rods into element blanks . The molding method has great limitations. Many optical glasses containing rare earth components cannot be pressed once, and must be formed by secondary molding. The secondary molding process is complicated and the equipment is complicated, requiring a large number of operators. , it is difficult to reduce the manufacturing cost; the slicing method is a cold processing process, which is doubled c...

AI Technical Summary

Problems solved by technology

The molding method has great limitations. Many optical glasses containing rare earth components cannot be pressed once, and must be formed by secondary molding. The secondary molding process is complicated and the equipment is complicated, requiring a large number of operators. , it is difficult to reduce the manufacturing cost; the slicing method is a cold processing process, which is doubled compared with the profiling method, but the low material utilization rate is its biggest drawback. The entire production process is from glass plate processing to optical element blanks. The utilization rate is about 60%, and the cost increase caused by material waste accounts for a large proportion

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