| 简介 |
Provided is an optical element, which is formed by vacuum-sintering a molded body of ceramic particles having an average particle diameter of 1 μm or more and 10 μm or less and including LnxAlyO[x+y]×1.5 (Ln represents a rare-earth element, x represents 1≰x≰10, and y represents 1≰y≰5). Ln preferably includes at least one kind selected from La, Gd, Yb, and Lu. The optical element preferably has a refractive index of 1.85 or more and 2.06 μm or less, and an Abbe number of 48 or more and 65 or less. The optical element having optical properties of high refractive index and low dispersibility is obtained. |
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