![]() ![]() analyzed the refractive index changes of ChG As 2S 3 lens with the cooling rates of finite element method (FEM) to verify and modify the calculated stress relaxation function. The finite element method has become an efficient method for PGM for predicting the molding force, profile deviation, residual stress of the lens, and birefringence distribution, and for designing the appropriate processing parameters for industrial purposes. Īround the molding temperature, ChG is in a viscoelastic state. However, fabricating high quality diffractive glass optics in micrometer size with PGM is still challenging, preventing it from being widely adopted in commercial applications. The low production cost prompt the ChG glass lens to be applied more in infrared optical systems. Among the ChGs, Ge xSe 1−x is a binary covalent glass that has been investigated extensively for its outstanding transparent property. To withstand abrasion during normal operation and improve transmittance, DLC (diamond like carbon) is generally applied to ChGs lenses. However, ChGs are soft optical materials. In addition, ChGs have low dispersion, low cost, high optical uniformity, and excellent properties in achromatism. ![]() The densities and dn/ dTs of ChGs are lower than those of Ge, thus having advantages in weight and athermalization. Compared to Ge or ZnSe, ChGs are amorphous and can be fabricated to the lenses with PGM, which provides a significant advantage over diamond turning due to its high-volume manufacture and lower cost. ChG has a wide optical window that can be extended from the visible to far-infrared spectrum. The establishment method of the glass preform deformation model and the established model can be used as a reference in efficiently optimizing PGM processing parameters when the designed lens has two different base radii of curvature.Īmong optical glass, chalcogenide glasses (ChGs) are a group of materials that contain one or more of the chalcogen elements (S, Se, and Te) and group IIIA-VA elements (Ge, Ga, As, and Sb). The error between the model result and the simulation result was less than 0.16. Based on the simulation results, a glass preform deformation model was established. ![]() Due to the phenomenon of incomplete deformation of the glass preforms in the experiments, two groups of finite element simulations with different boundary conditions were carried out with MSC.Marc software, to reveal the relationship between the deformation progress and the parameters settings. The finite element method (FEM) was adopted to analyze the glass preform deformation. The process of the deformation of the glass preform is rarely discussed, especially in the case of multi-machining parameters in the experiment. The stress distribution, surface profile, and reduced refractive index of the molded lens are based on the lens being fully formed. Precision glass molding (PGM) technology is a cost-efficient process for the production of micro/nanostructured glass components with complex surface geometries. Easy to use barcode label designing tool is simplest and. access entire information of any product including item number, code, price etc in real time for recording movements of goods. Top Software Keywords Show more Show less ![]()
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