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&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a small zoom lens that has high variable magnification and high performance and suppresses the chromatic aberration, an imaging optical device and digital equipment having the zoom lens. SOLUTION: In the zoom lens ZL of positive, negative, positive, positive, and positive, at least first group Gr1 moves in variable magnification from a wide angle end (W) to a telescopic end (T); the first group Gr1 is formed of two or less lenses; the third group Gr3 has a positive lens L31 whose convex surface is turned to the object side on the most object side; and at least one surface of the positive lens L31 is an aspherical surface. The zoom lens ZL satisfies a conditional expressions: 1.67>Nd31 (Nd31: refractive index related to the d line of the positive lens L31 on the most object side constituting the third group Gr3) and 47.0>νd31 (νd31: Abbe number related to the d line of the positive lens L31 on the most object side constituting the third group Gr3). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a simple and inexpensive laser beam scanner, with which an image forming apparatus for forming high quality images at high speed, for example, is obtained, and to provide a light deflection mechanism and a light deflection optical element that are used for the laser beam scanner. SOLUTION: The laser beam scanner is compatible to a high-speed rotation, while keeping fixed accuracy and while being low in cost, by using a light weighted resin optical element 61 in place of a metal polygon mirror. Furthermore, since the optical path length of a laser beam passing through a transparent face 61b will hardly, as vary compared to the case where the laser beam is reflected by a rotating polygon mirror, the deviation of a focused point is less likely to occur, and thus an imaging surface is easily corrected. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens whose number of optical element groups to be driven is made less, whose size is reduced and whose moving mechanism is made simple by including a liquid optical element in a lens system made of a plurality of lenses. SOLUTION: When a zooming operation is performed, power supply circuit 31 computes a required amount of compensation with a zooming signal (or by referring to a table) and applies a prescribed voltage to a liquid optical element QL. By controlling as above, the liquid optical element QL changes its optical power to a desired level so as to realize a compensation operation. Thus, no mechanism is required to move a first lens group G1 to an optical axis, and consequently, the composition is made simple and the size is reduced. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an optical element for a sensor unit and the sensor unit, having directivity so as to make the outputs of right and left solar radiation sensors an optimally corrected output, with respect to air-condition control of each seat. SOLUTION: The optical element forms a wider recess S2, as going outward, on the optical face side of an emission side of the optical element OE. Since the inner peripheral face of the recess S2 has a plurality of elliptical annular curved faces with a prescribed axial line as a reference, the light flux of an amount, corresponding to an azimuth angle and elevation angle of the incident light flux, can be emitted on the sensor SN. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an organic EL planar light emitting body high in adhesive strength between a light extracting film and an adhesive layer and suppressed in light extracting deviation since the invasion of an adhesive agent into a recessed part of the light extracting film is suppressed to the minimum, and excellent in luminance, and to provide a display device and a lighting device having high luminance and contrast using the organic EL planar light emitting body. SOLUTION: In the organic EL planar light emitting body having the light extracting film in which a metal electrode, a light emitting layer, a transparent electrode and a sealing film 25 are laminated on a substrate 11 in this order and a plurality of protruded parts 12 contact with the sealing film 25 with the adhesive layer 30 between, relations (1) 0.7≤(Ho-ho)/Ho≤0.95 and (2) 0.65×Vo(0.6Ho≤h≤Ho) COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens which has high resolving power in all the photographing range, whose entire length is short, and which is compact and has high variable power, and to provide an imaging apparatus. SOLUTION: The zoom lens 1 includes a 1st lens group 10 having positive refractive power, a 2nd lens group 20 having negative refractive power, a 3rd lens group 30 having positive refractive power, and a 4th lens group 40 having positive refractive power in order from an object side. The 1st lens group 10 and the 3rd lens group 30 are fixed and the 2nd lens group 20 moves to an image surface side so as to perform variable power, and the 4th lens group 40 corrects image surface variation associated with the variable power by moving, and also performs focusing by moving. The 2nd lens group 20 is equipped with a meniscus negative lens 21 turning a concave surface to an image surface side, a negative lens 22, a positive lens 23 and a negative lens 24 in order from the object side. The zoom lens 1 satisfies 0.23≤absolute value (f2/(fw*ft) 1/2 )≤0.40 and 7≤(Σd+fb)/2YD≤10. The zoom lens 1 is mounted on the imaging apparatus. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens reduced in the number of optical element groups to be driven, small in size and simple in a mechanical mechanism by including at least one transmissive type refractive power variable element among a lens system made of a plurality of lenses. SOLUTION: In the optical system which includes a second lens group G2 that is moved during a variable magnification operation, a refractive power variable element having a compensating function which is used to correct the focus shift associated with the variable magnification operation and a focusing function which is used to correct the focus shift associated with the change in the distance to an object is set as a first lens group G1. Then, the amount of movement of the lens groups that are to be moved for compensation and focusing is made small and the lens groups, which normally require mechanical driving mechanisms, are reduced only for the variable magnification group and the zoom lens, in which number of lens groups being driven is small, the size is reduced and the mechanical mechanism is made simple, is realized. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an imaging lens and an imaging apparatus that have excellently compensated aberrations although a variable-focus 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)2011,JPO&INPIT