1. 阿貝數(the number of Abbe) vd 的公式如下 : vd=(nd- 1)/(nF-nC) 其中nd 對應於氦的587,6 nm 譜線 ,nF 和nC 個別對應於氫的486.1nm 和656.3 nm 的譜線 。 請問阿貝數有何物理意義? 2. 光強為I0 的自然光相繼通過偏振片P1,P2,P3 後光強為I3 ,已知P1 跟P2 的夾 角α為30 度 ,且P1 ...
The glass has a refractive index (nd) of more than 1.81, an Abbe number (Vd) of above 46 but less than 48; the upper limit of internal transmittance (λƮ80) of the glass is below 350 nm; and the liquidus temperature is below 1150°C. 该玻璃具有折射率(nd)为1.81以上,阿贝数(Vd...
Negative abnormal partial dispersion, 1.69 - 1.83 index of refraction ND and possesses 29 - 38.5 Abbe numbers vd the optical glass null in the bluePURPOSE: To develop characteristics such as anomalous partial dispersion, specified refractive index and Abbe's number by forming a glass of a ...
I/cgGdArcxGIitvogzeHiNs9+Vd+Gx0/X12Esa8iR6tQnnBKasXMQkveYuq9kgmP 15 + H1+QTkatEjZ/Pm0de8KnRX6o20uQZyN+1v2lwKW4NqYB7b9kupMW6n6tFbuBCe8a 16 + 8fEjdVllGrSrUjg1o9WZAEGlB47C8wIDAQABoxAwDjAMBgNVHRMBAf8EAjAAMA0G 17 + CSqGSIb3DQEBCwUAA4ICAQCDi+e5S8KI3YppoMIszzhMDpFbNKb8FAwpMoihT...
Optical and ophthalmic glass with refractive index nd at least nd 1.68 and abbe number vd at least 41.6MARC * CLEMENTDANUTA * GRABOWSKIVOLKMAR * GEILER
The present invention relates to lead-free optical glasses having a refractive index nd between 1.50 and 1.56 and an Abbe number vd between 50 and 64 and the following composition (in% by weight referred to with the oxide): SiO2: 62-75; B2 O3: 5-9.5; BaO: 4, 5 - 21; ZnO: 0 -...
A borosilicate glass composition suitable for use as an eyeglass lens, characterized by having a refractive index nd≥1.58, an Abbe number vd≥45, a density ρ≤2.75 g/cm, and an excellent aptitude for chemical hardening, consisting essentially of the following composition, in weight percent: ...
Under compression, the Abbe number of the optical glass object varies through: delta vd = +- delta nd/0.01 at most, where delta vd is the variation in Abbe number, and delta nd is the variation in refractive index.FOTHERINGHAM ULRICH
The present invention relates to optical glass free of lead, having a refractive index of the nd between 1 and 50 and 1, 56 and abbe number vd between 50 and 64 and the following composition (in% by weight relative to the oxide): sio2: 62 - 75; b2 o3: 5 - 9, 5; bao: 4, 5...