Understand the differences between various optical glass materials. Glass has been made for five thousand years, and it is believed that the earliest makers were the ancient Egyptians. China has been able to make glass in the Eastern Zhou Dynasty, and the glass composition contains lead oxide and barium oxide, which is obviously different from the ancient glass of other countries. In Chinese history, the glass is called glass, Po Li, false crystal material, glass and other names.Glass has a series of very valuable characteristics: transparent, hard, good chemical stability; Through the adjustment of chemical composition, the physical and chemical properties of the glass can be greatly adjusted to meet various requirements of use; Hollow and solid products of various shapes can be made by blowing, pressing, drawing, casting, trough sinking, centrifugal casting and other forming methods; Devices with complex shapes and strict dimensions can be made by processing methods such as welding and powder sintering. Moreover, the raw materials for making glass are abundant and the price is low. Therefore, as a structural material and functional material, glass has been widely used in building materials, light industry, transportation, medicine, electronics, and other fields.
광학 설계자가 광학 렌즈에 관해 이야기할 때 그들은 단일 렌즈 요소 또는 렌즈 요소 그룹을 언급합니다(그림 1). 모놀리식 렌즈의 예로는 PCX(평면 볼록) 렌즈, DCX(이중 볼록) 렌즈, 비구면 렌즈 등이 있습니다.
일체형 초음파 진단기는 리튬 배터리를 탑재한 업계 최초의 내시경 초음파 진단기로, 국제적으로 권위 있는 레드닷 어워드(Red Dot Award)를 수상하였습니다. 대기 시간은 1.5시간에 달할 수 있으며, 외관은 작고 단순하며...
앵글로아메리칸이 이번 컨퍼런스에서 선보인 대표 제품은 '풀HD 전자내시경 시스템(iPS-8000max)'이다. 진단과 치료의 통합을 핵심으로 하는 이 제품에는 다양한 혁신적인 기술이 통합되어 있습니다.
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