Chalcogenide glass mould and mould pressing method thereof
A technology of chalcogenide glass and molds, which is applied in the field of molding of optical parts, can solve problems such as easy edge chipping, difficulty in completely releasing stress in optical parts, and difficulty in meeting technical requirements in molding quality.
Inactive Publication Date: 2015-11-11
TIANJIN JINHANG INST OF TECH PHYSICS
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Problems solved by technology
[0005] However, compared with the current mature visible light glass molding, infrared chalcogenide glass molding is still a new technology.
Chalcogenide glass has a disadvantage: its thermodynamic properties are unstable, which limits its application in compression molding
The thermal expansion coefficient of chalcogenide glass is much larger than that of the mold material, and it is difficult for the optical parts to completely release the stress in the closed mold, and it is easy to cause edge chipping and fragmentation during the pressing process
Therefore, the molding quality is difficult to meet the technical requirements, and the molding of chalcogenide glass optical parts
Method used
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[0039] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0040] Such as Figure 1 to Figure 5 As shown, the present invention provides a chalcogenide glass molding mold, the mold is a combined structure, including the upper mold core 1, the lower mold core 2 and the sleeve 3, the upper mold core 1 and the lower mold core 2 are located Inside the sleeve 3, and the lower end surface of the upper mold core 1 and the upper end surface of the lower mold core 2 are aspherical, and the cavity formed between the two is used to accommodate the chalcogenide glass to be molded. The upper mold The core 1 and the lower mold core 2 respectively include a surface-shaped pressing area 101, an annular groove area 102, an end face positioning area 103, and a radial positioning area 104. The f...
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The invention relates to a chalcogenide glass mould and a mould pressing method thereof and belongs to the technical field of mould pressing on optical elements. The chalcogenide glass mould has the advantages that the chalcogenide glass mould is designed on the basis of reasonable structure and parameters, so that the problems that a chalcogenide glass material is high in thermal expansion coefficient and edge breakage and fragmentation can be easily caused during mould pressing can be solved; design is simple and reasonable, a release space is provided for stress produced during mould pressing on a part, and processing precision requirement on a prefabricated part produced through mould pressing is reduced; and meanwhile, the defects are overcome, and a high-quality chalcogenide glass aspherical surface can be efficiently processed.
Description
technical field [0001] The invention relates to the technical field of molding of optical parts, in particular to a chalcogenide glass molding die and molding method. Background technique [0002] The infrared imaging system is a key component of thermal imaging instruments such as infrared guidance and detection. Expensive infrared optical components become an important factor limiting the cost of infrared imaging systems. At present, most infrared optical components are processed from crystal materials, which are expensive and complex to process. Therefore, finding a cost-effective and easy-to-process alternative material has become an inevitable choice. Chalcogenide glass has high transmittance and good optical properties in the infrared band, and can replace some of the aforementioned materials. Moreover, because it is an amorphous material, it can be processed into any shape by molding, so it has attracted the attention of the infrared industry. [0003] Chalcogenid...
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IPC IPC(8): C03B11/08C03B11/00
Inventor 叶斯哲回长顺
Owner TIANJIN JINHANG INST OF TECH PHYSICS