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Producing glass with defined inhomogeneous optical properties, comprises preparing a mixture of different components, which differ with regard to their impact on glass properties, and exposing the mixture to the effect of forces
Producing glass with defined inhomogeneous optical properties, comprises preparing a mixture of different components, which differ with regard to their impact on glass properties, and exposing the mixture to the effect of forces
The method for producing glass with defined inhomogeneous optical properties, comprises preparing a mixture of different components, which differ with regard to their impact on glass properties, where each of the components are prepared in the form of mixture particles (1, 2) and masses or sizes depending on the glass properties are determined by the influence of the concerned components, exposing the mixture to the effect of forces, where the parameter and direction of action of the force are determined, so that the mixture particles change their positions relative to each other. The method for producing glass with defined inhomogeneous optical properties, comprises preparing a mixture of different components, which differ with regard to their impact on glass properties, where each of the components are prepared in the form of mixture particles (1, 2) and masses or sizes depending on the glass properties are determined by the influence of the concerned components, exposing the mixture to the effect of forces, where the parameter and direction of action of the force are determined, so that the mixture particles change their positions relative to each other on the basis of the different units of their masses and sizes, ending the effect of forces when the mixture particles have positions, which correspond to inhomogeneous optical properties to be achieved, and then melting the mixture and finally cooling up to solidification. Two optical glass types are used in the method and are borkron glass BK7 with refractive index of 1.5 and flint glass with refractive index of 1.8. The mixture is prepared from glass raw material, sand, soda, lime and additives as starting material. The mixture particles differ with regard to their masses and the mixture is mixed by centrifugal forces, the mixture particles differ with regard to their sizes and the mixture is mixed by vibrations and/or the mixture particles differ with regard to their masses and sizes and the mixture is mixed by centrifugal forces and vibrations. The mixture is incorporated in the interior of a hermetically sealed hollow mold (3). The mold of the interior corresponds to the desired outer contour of an optical element after cooling the glass up to below the solidification temperatures. The interior is additionally filled with nitrogen or argon. During the melting process, the pressure in the interior of the hollow mold is adjusted to 0.5 mbar. During the cooling of the melt, the pressure in the interior of the hollow mold is adjusted to = 10 - 2bar. The hollow mold corresponds to the contour of the optical element to be produced or a glass block, of which selected areas are used for producing the optical element. The melting of the mixture and/or cooling the melt are carried out in dependent of temperature-time-control.
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