Introduction to the production process and categories of optical quartz glass in the optical industry

The production process of quartz glass is as follows:

        1. Manufacturing melting furnace: There are two kinds of melting furnace: clay furnace and platinum furnace. In recent years, small platinum furnaces have been used in optical glass infiltrated with rare elements to maintain stable quality.

        2. Putting optical glass raw materials: After a long time of drying in the melting furnace (especially the clay furnace), put it into the melting furnace according to the special formula and selected raw materials, and prepare for melting.

        3. Heating, melting, stirring: heating conditions, depending on the material. However, all materials must be stirred evenly to achieve homogeneity.

        4. Cooling: "Xu cold" for a long time. However, the length of time also varies depending on the material, which is the most important process to ensure good quality.

        5. Split furnace and sorting: split the clay furnace, take out the lumpy rough embryo and select it.  

       6. Inspection, testing and shaping: check or test its performance item by item to ensure the excellent quality of quartz glass.

        7. Cutting and chamfering (edge trimming): The block rough embryo is cut into small pieces and chamfered according to the purpose and specifications.

        8. Press embryo forming: After heating and softening the rough embryo, press the embryo to form according to the specifications of the engineering drawing. However, it is necessary to manufacture or prepare various molds, tools and auxiliary materials in advance.

        Nine, passivation: annealing passivation, eliminate internal stress.

        10. Test and inspection: test the optical performance and appearance of the pressed embryo. Optical Quartz Glass The finished product will become the blank of the downstream industry (optical component manufacturing and processing plant), and after further processing and grinding, it will become an optical component.

          The gas (gas) generated from the raw material during melting will remain in the glass like foam, which is: bubbles. Traces of stirring will also remain in layers inside the glass, like streaks, which are called: veins.

        In addition to optical quartz glass, the main composition of the common white sheet of Yivite Glass Factory is soda lime silicate system, the refractive index is 1.51, the transmittance of visible light is more than 89%, and it can absorb ultraviolet rays below 280nm.

        The main composition of the optical white sheet is sodium calcium silicate system, the refractive index is 1.531, the Abbe number is 60.5, the light transmittance is above 91%, and the anti-ultraviolet performance is the worst. UV optical white film is made by adding a small amount of titanium oxide and cerium oxide to the composition of the optical white film, so that it has the performance of absorbing ultraviolet rays. The following UV rays. And the mechanical properties and chemical stability are good, it is a white high-quality lens that absorbs ultraviolet rays widely used at home and abroad.