摘要:
A compact and lightweight zoom lens system having excellent imaging performance, which is favorably applicable to an interchangeable-lens type digital camera system, is provided. The zoom lens system of the present invention includes, in order from an object side to an image side, a first lens unit having positive optical power and composed of not more than two lens elements, a second lens unit having negative optical power, a third lens unit having negative optical power, and a fourth lens unit having positive optical power. In zooming from a wide-angle limit to a telephoto limit, the fourth lens unit moves along an optical axis. Further, the following conditions are satisfied: 1.50
摘要:
A zoom lens system of lens units, the system including, in object-side-to-image-side order: a first lens unit having positive optical power; a second lens unit; an aperture diaphragm; one or more additional lens units, with a first of the additional lens units being a first focusing-lens unit having negative optical power and moving along the optical axis in the zoom lens system focusing; an image blur compensating lens unit, adjacent the first focusing-lens unit and movable in a direction perpendicular to the optical axis in order to optically compensate image blur; with the lens system satisfying: 0.1
摘要:
A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit and further that can compensate an image blur caused by vibration applied to the entire system. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit. The plurality of lens units include: a negative lens unit that is arranged on an object side relative to the aperture diaphragm and provided with negative optical power having an absolute value greatest in the entire system and that moves in a direction along an optical axis at the time of zooming; a focusing lens unit that is arranged in an optical path between the negative lens unit and the aperture diaphragm and that moves in a direction along the optical axis at the time of focusing such that an interval relative to the negative lens unit should vary; and an image blur compensation lens unit that is arranged on the image side relative to the focusing lens unit and that moves in a direction perpendicular to the optical axis when the image blur caused by vibration in the zoom lens system should be compensated.
摘要:
A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit. The plurality of lens units include: a negative lens unit that is arranged on an object side relative to the aperture diaphragm and provided with negative optical power having an absolute value greatest in the entire system and that moves in a direction along an optical axis at the time of zooming; and a focusing lens unit that is arranged in an optical path between the negative lens unit and the aperture diaphragm and that moves in a direction along the optical axis at the time of focusing such that an interval relative to the negative lens unit should vary.
摘要:
An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power. Then, the lens units move respectively along the optical axis in such a manner that intervals between the individual lens units should vary so that the variable magnification is achieved. Further, the condition |(R2mi1+R2mi2)/(R2mi1−R2mi2)|
摘要:
An exposure apparatus that exposes a substrate to a pattern of an original. An illumination optical system illuminates the original. A projection optical system projects the pattern that is illuminated by the illumination optical system onto the substrate. A vacuum chamber houses at least one of the illumination optical system and the projection optical system. A heat absorber, arranged in the vacuum chamber, absorbs heat in the vacuum chamber. A heat conductor includes a metal member and connects the heat absorber and a wall of the vacuum chamber. The metal member is softer than the heat absorber and the wall, and fills a space between the heat absorber and the wall, and a cooler, arranged outside the vacuum chamber, cools the wall.
摘要:
A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit. The plurality of lens units include: a negative lens unit that is arranged on an object side relative to the aperture diaphragm and provided with negative optical power having an absolute value greatest in the entire system and that moves in a direction along an optical axis at the time of zooming; and a focusing lens unit that is arranged in an optical path between the negative lens unit and the aperture diaphragm and that moves in a direction along the optical axis at the time of focusing such that an interval relative to the negative lens unit should vary.
摘要:
A zoom lens system according to the present invention comprises a plurality of lens units, in order from an object side to an image side, including at least: a first lens unit having positive optical power; a second lens unit having negative optical power; and a third lens unit having positive optical power, wherein magnification change is performed by changing an interval between the individual lens units, wherein the second lens unit, in order from the object side to the image side, comprises: a lens element A having negative optical power; a lens element B that has an aspheric surface and has negative optical power; and a lens element C having positive optical power, and wherein the second lens unit satisfies the following conditions (1): 1.85
摘要:
A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n 12>1. 88 and ν 12
摘要:
An imaging optical instrument 12 includes: an imaging optical system 1; an imaging element 2; an image shift unit 3 for working on at least one of the imaging optical system 1 and the imaging element 2 so as to shift a position of a subject image with respect to the imaging element 2; an image storage unit 4 for storing a plurality of sets of image data; a harmful luminance image detection unit 5; and an image correction unit 6. The harmful luminance image detection unit 5 includes: an image shift arithmetic unit 8 for making the positions of the subject image of the plurality of sets of image data coincide with one another; and a differential image arithmetic unit 9 for carrying out differential arithmetic processing with respect to the sets of image data with the positions of the subject image having been made to coincide with one another, so as to detect a set of harmful luminance image data from sets of harmful luminance image data obtained in relation to the plurality of sets of image data. The image correction unit 6 uses the detected set of harmful luminance image data and corrects the image data corresponding to the detected set of harmful luminance image data, so as to obtain a correction-completed image. This configuration allows the imaging optical instrument to be capable of preventing the image quality of a captured image from being deteriorated by dust or a scratch in the imaging optical system.