Patent
Imaging lens and imaging apparatus
Reads0
Chats0
TLDR
In this article, the direction from the peak of the boundary surface B of a liquid crystal element QL to the radius center of the least radius of curvature is made to match the direction of the peak to an aperture stop S, so that the boundary surfaces B becomes nearly concentric with the stop, and the angle of incidence of an off-axis light beam on B (the angle between the incident light beam and the normal of B) when the boundarysurface B has the largest refracting power can be made small.Abstract:
PROBLEM TO BE SOLVED: To provide an imaging lens and an imaging apparatus that have excellently compensated aberrations although a varifocal lens which uses an electronic capillarity phenomenon as an automatic focusing means is provided. SOLUTION: When the direction from the peak of the boundary surface B of a liquid crystal element QL to the radius center of the least radius of curvature is made to match the direction from the boundary surface peak to an aperture stop S when the boundary surface B has the least radius of curvature, the boundary surface B becomes nearly concentric with the stop, so that the angle of incidence of an off-axis light beam on the boundary surface B (the angle between the incident light beam and the normal of the boundary surface) when the boundary surface B has the largest refracting power can be made small, and the aberration of the off-axis light beam generated on the boundary surface B can be reduced more. COPYRIGHT: (C)2005,JPO&NCIPIread more
References
More filters
Patent
Photographic lens system
Masafumi Isono,雅史 磯野 +1 more
TL;DR: In this article, a front group F, a diaphragm A and a positive rear group R is provided with a negative lens RL1, a positive lens RL2 and apositive lens RL3, and the maximum effective radius of the aspherical surface is expressed by (ymax), with reference to the arbitrary height (y) in a direction vertical with respect to the optical axis, satisfying 0.7ymax
Patent
Image forming optical system and electronic equipment using the same
Takahiro Amauchi,隆裕 天内 +1 more
TL;DR: In this paper, a positive meniscus lens L 1 turning its convex surface to an object side, which functions as a 1st lens, a brightness diaphragm S, a meniscous lens L 2 turning its surface convex to an image side, and a positive negative lens L 4 which function as a 4th lens in order from the object side.
Patent
Optical element, optical system and photographing device which house optical element or the like having variable power structure in lens element
TL;DR: In this paper, the problem of providing an optical element having a structure by which a lens power can be controlled efficiently with a small-sized configuration by using the electro wetting phenomenon and to provide an optical system and a photographing device which house the optical element or the like having a variable power structure in a lens element.
Patent
Capacitance detector for optical element, and optical device with it
TL;DR: In this paper, a capacitance detector capable of accurately detecting the capacitance corresponding to the deformation change of a variable focus lens as an optical element with a simple constitution, and accurately controlling various actions of the optical device based on the detection results, was provided.
Patent
Optical element and optical device having this optical element
秀夫 高,Eirishi Kawanami,Hideo Ko,Goro Noto,Ichiro Onuki,Takayuki Tsuboi,孝之 坪井,一朗 大貫,英利子 川浪,悟郎 能登 +9 more
TL;DR: In this paper, an optical element is formed by hermetically sealing a conductive or polar first liquid and a second liquid immiscible with the first liquid to each other into a container in the state that their boundaries constitute a prescribed shape and its optical characteristics are changed by a change in the boundary shape by impression of voltage to the electrodes disposed in this container.