摘要:
The present invention provides a wave plate capable of obtaining preferable phase conversion characteristic over a wide wavelength range. The wave plate includes an aluminum oxide film having linear grating groove patterns. The period L (μm) and the duty ratio De of the grating groove patterns are set at values within the first range specified by the following four formulas: L≦0.65 L≧2×10−14e31.263De L≦6.0317De2−10.352De+5.0516 (De−0.85)2/0.442+(L−0.41)2/0.392≦1
摘要翻译:本发明提供能够在宽波长范围内获得优选的相变特性的波片。 波片包括具有线性格栅凹槽图案的氧化铝膜。 光栅槽图案的周期L(母)和占空比De被设定在由以下四个公式指定的第一范围内的值:L <= 0.65 L> = 2×10 14 e <31.263> De L < = 6.0317De <2> -10.352De + 5.0516(De-0.85)2 /0.44 2 +(L-0.41)2 /0.39 2 <= 1
摘要:
The present invention provides a wave plate capable of obtaining preferable phase conversion characteristic over a wide wavelength range. The wave plate includes an aluminum oxide film having linear grating groove patterns. The period L (μm) and the duty ratio De of the grating groove patterns are set at values within the first range specified by the following four formulas: L≦0.65 L≧2×10−14e31.263De L≦6.0317De2−10.352De+5.0516 (De−0.85)2/0.442+(L−0.41)2/0.392≦1
摘要:
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; and a fourth lens having negative refractive power, arranged from an object side to an image plane side. In the first lens, a curvature radius on an object-side surface is positive and a curvature radius of an image-side surface is negative. In the third lens, curvature radii of an object-side surface and an image-side surface are both negative. In the fourth lens, curvature radii of an object-side surface and an image-side surface thereof are both positive. When the whole lens system has a focal length f and a distance from the object-side surface of the first lens to an image-side surface of the fourth lens is L14, the imaging lens satisfies the following expression: 0.5
摘要:
An imaging lens includes a first lens having positive curvature radii on both an object side and an image side, a second lens having a concave shape on both sides, and a third lens having positive curvature radii on both the object side and the image side. The first to third lenses are arranged in this order from the object side toward the image side. When a whole lens system has a focal length f, the first lens has a focal length f1, the second lens has a focal length f2, and the third lens has a focal length f3, the following conditional expressions are satisfied: f1
摘要:
An imaging lens includes a positive first lens; a negative second lens with a meniscus lens shape directing a convex surface thereof to an object side near an optical axis; a positive third lens; a negative fourth lens with a meniscus lens shape directing a concave surface thereof to the object side near the optical axis; a negative fifth lens with a meniscus lens shape directing a convex surface thereof to the object side near the optical axis, arranged in this order from the object side. The imaging lens satisfies the following conditional expressions when the first lens has a focal length f1, the second lens has a focal length f2, the third lens has a focal length f3, the fourth lens has a focal length f4, and the fifth lens has a focal length f5: f1
摘要:
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; and a fourth lens having positive refractive power, arranged from an object side to an image plane side. In the first lens, a curvature radius on an object-side surface is positive and a curvature radius of an image-side surface is negative. In the second lens, curvature radii of an object-side surface and an image-side surface are both positive. In the third lens, curvature radii of an object-side surface and an image-side surface thereof are both negative. When the whole lens system has a focal length f and a distance from the object-side surface of the first lens to an image-side surface of the fourth lens is L14, the imaging lens satisfies the following expression: 0.5
摘要:
An optical waveguide in which a groove is formed on the top surface of a substrate used as a lower clad and a core is formed in the groove, characterized in that the core is formed in such a way that the top face of the core within the groove is at a lower level than the top face of the substrate, and an upper clad may also be provided on the core, and the core is preferably formed from an organic-inorganic hybrid material.
摘要:
A laminated optical element includes an optical substrate made of an optical material, an intermediate layer provided on the optical substrate, and an optical resin layer provided on the intermediate layer. The optical resin layer is made of a resin composed of an organometallic polymer having an -M-O-M- bond (M is a metal atom), a metal alkoxide and/or a hydrolysate thereof having only one hydrolyzable group, and an organic polymer having a urethane bond and a methacryloxy group or an acryloxy group. The intermediate layer is obtained by dispersing metal oxide microparticles in a matrix resin composed of a metal alkoxide having a radical polymerizable group and a hydrolyzable group and/or a hydrolysate thereof.
摘要:
An organometallic polymer material is obtained which excels in translucency, shows improved hardness after it is cured and exhibits high reliability at high temperature and high humidity.Characteristically, the organometallic polymer material contains an organometallic polymer having an —M—O—M— bond (M indicates a metal atom), a metal alkoxide having a single hydrolyzable group and/or its hydrolysate and an organic polymer having a urethane bond and a methacryloxy or acryloxy group, and preferably further contains an organic anhydride and/or an organic acid.
摘要:
An electret device includes an electret film capable of storing charges and a protective film formed so as to substantially surround a side end surface of the electret film.