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    • 45. 发明授权
    • Optical filter and optical apparatus
    • 光学滤光片和光学仪器
    • US09513417B2
    • 2016-12-06
    • US14443191
    • 2013-11-18
    • CANON DENSHI KABUSHIKI KAISHA
    • Masayuki UchiyamaMichio Yanagi
    • G02B5/22G02B1/115G02B1/118G02B5/20G02B3/00G03B11/00
    • G02B5/22G02B1/115G02B1/118G02B3/0087G02B5/205G03B11/00
    • Regarding an optical filter comprising a light-transmitting substrate, a gradient refractive index thin film with a refractive index change in the film thickness direction formed on the substrate and an anti-reflection structure formed on the gradient refractive index thin film, the gradient refractive index thin film is formed so as to have light absorbing characteristic and a refractive index characteristic such that the refractive index change comprising plural changing points with increases and decreases of the refractive index has a tendency to reduce from the side of the substrate toward the side of the anti-reflection structure. The optical filter has excellent environmental resistance and low reflection. The optical filter can be suitably used in an imaging optical system of an optical apparatus or a display of an electronic device.
    • 关于包含透光性基板的光学滤波器,在基板上形成的膜厚方向上的折射率变化的梯度折射率薄膜和形成在该梯度折射率薄膜上的抗反射结构,梯度折射率 薄膜形成为具有光吸收特性和折射率特性,使得包含多个变化点的折射率变化点的折射率变化的增加和减小的倾斜度从基板的侧面朝向侧面减小 防反射结构。 光学滤波器具有优异的耐环境性和低反射性。 光学滤波器可以适用于光学设备的成像光学系统或电子设备的显示器。
    • 46. 发明授权
    • Optical element, mold, and optical device
    • 光学元件,模具和光学装置
    • US09500778B2
    • 2016-11-22
    • US14163224
    • 2014-01-24
    • Chieko HatashitaTakayuki NakamuraKentaroh HagitaToshiya Yamaguchi
    • Chieko HatashitaTakayuki NakamuraKentaroh HagitaToshiya Yamaguchi
    • G02B1/118G02B13/14
    • G02B1/118G02B13/14
    • An optical element having an antireflection effect includes an incident plane and an emission plane and a conical microstructure formed on at least one plane of the incident plane and the emission plane. The conical microstructure includes a first structure formed of a plurality of conical microprojections with an average height H1 and a second structure formed of a plurality of conical microrecesses with an average height H2. The average height H1 satisfies an inequality H1≦1/3*λ/n and the average height H2 satisfies an inequality H2≦1/3*λ/n. An average pitch P between the first structure and the second structure satisfies following conditions: H1/2≦P≦1/3*λ/n, and H2/2≦P≦1/3*λ/n, in which the use wavelength is defined as λ and the refractive index relative to the use wavelength is n.
    • 具有防反射效果的光学元件包括在入射面和发射面的至少一个平面上形成的入射面和发射面以及圆锥形微结构。 圆锥形微结构包括由具有平均高度H1的多个锥形微喷射体形成的第一结构和由具有平均高度H2的多个锥形微过程形成的第二结构。 平均高度H1满足不等式H1≤1/ 3 *λ/ n,平均高度H2满足不等式H2≤1/ 3 *λ/ n。 第一结构和第二结构之间的平均间距P满足以下条件:H1 /2≤P≤1/ 3 *λ/ n,H2 /2≤P≤1/ 3 *λ/ n,其中使用波长 被定义为λ,相对于使用波长的折射率为n。