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.
Pan fydd dylunwyr optegol yn siarad am lensys optegol, maent yn cyfeirio at elfen lens sengl neu grŵp o elfennau lens (Ffigur 1). Mae enghreifftiau o lensys monolithig yn cynnwys lensys plano-convex (PCX), lensys amgrwm dwbl (DCX), lensys asfferig, ac ati.
Y ddyfais ddiagnostig ultrasonic integredig yw uwchsain endosgopig cyntaf y diwydiant gyda batri lithiwm ac enillodd Wobr Red Dot sy'n enwog yn rhyngwladol. Gall yr amser wrth gefn gyrraedd 1.5 awr, mae'r ymddangosiad yn gryno ac yn syml, mae'r gor...
"System Endosgop Electronig Llawn HD (iPS-8000max)" yw'r cynnyrch seren a lansiwyd gan Eingl America yn y gynhadledd hon. Gydag integreiddio diagnosis a thriniaeth fel y craidd, mae'r cynnyrch hwn yn integreiddio nifer o dechnolegau arloesol, sy'n ...
Hawlfraint © Nanyang City Jingliang Optical Technology Co, Ltd Cedwir pob hawl — Polisi preifatrwydd