摘要:
A projection optical system for use in a precise copy which uses a pair of catadioptric optical systems (I and II) consisting of convex mirrors (2, 6), concave mirrors (3, 5), and phase correction members (4, 4') is shown. Two catadioptric optical systems (I and II) commonly use an entrance pupil (E, EP) on a coaxis and are coupled so as to respectively face the phase correction members (4, 4'). Each of the concave mirrors (3, 5) has an opening at the center. Each of the convex mirrors (2, 6) has no opening in one embodiment but has an opening portion at the center in another embodiment.
摘要:
An optical system forming an image of a pattern provided in an object plane of the optical system in an image plane of the optical system, comprises: a plurality of non-parallel optical axis segments; a plurality of intermediate images; and a plurality of mirrors. Radiation emerging from an intermediate image is incident in this order on a first mirror positioned optically remote from a pupil position, a second mirror positioned optically near to a pupil position to form a pupil mirror, and a third mirror positioned optically remote from a pupil position, prior to forming another intermediate image, wherein the first mirror a first concave mirror, and the third mirror is a second concave mirror.
摘要:
An image optical system comprising a reflecting mirror for focusing incident light from an object to form an image, an aperture stop disposed at the center of curvature of the reflecting mirror, and aberration correcting plate which is disposed near the aperture stop, whose one side is aspherical, and which eleminates the spherical aberration produced by the reflecting mirror, wherin when the aspherical shape of the aberration correcting plate is approximated by a quartic function z=A(y*y*y*y-k*h*h*y*y) where z is the coordinate along the optical axis, y is the coordinate along a line perpendicular to the optical axis, and A is a constant determined by the correction for eliminating the spherical aberration, parameter k is approximately one.
摘要:
An imaging optical system includes a reflecting mirror for imaging incident rays of light from an object, an aperture diaphragm disposed at the center of curvature of the reflecting mirror, and an aberration correcting plate disposed near the aperture diaphragm, having one side of an aspherical shape, and for eliminating spherical aberration produced in the reflecting mirror, in which when a coordinate in a direction of an optical axis is z, a coordinate in a direction vertical to the optical axis is y, a radius of the aperture diaphragm is h, and a constant determined by a correction amount for eliminating the spherical aberration is A, and when the aspherical shape of the aberration correcting plate is approximated by a quartic function, z = A(y*y*y*y - k*h*h*y*y), a parameter k is almost 1.
摘要翻译:成像光学系统包括用于对来自物体的入射光入射的反射镜,设置在反射镜的曲率中心处的孔径光阑和设置在孔径光阑附近的像差校正板,具有非球面形状的一侧 并且为了消除在反射镜中产生的球面像差,其中当光轴方向上的坐标为z时,垂直于光轴的方向上的坐标为y,孔径光阑的半径为h,并且 通过用于消除球面像差的校正量确定的常数为A,当像差校正板的非球面形状由四次函数近似时,z = A(y * y * y * y-k * h * h * y * y),参数k几乎为1.
摘要:
Bei einem Verfahren zum Korrigieren von optischen Wellenfront fehlern in einem optischen System wird die optische Wellenfront für verschiedene Wellenlängen und Gesichtsfelder zwischen Eintrittspupille (EP) und Austrittspupille (AP) berechnet. Eventuelle Phasenunterschiede werden durch mindestens eine die Phasenunterschiede ausgleichende Fläche (5, 7) im Strahlengang ausgeglichen. Ein besonderes, zweckmässig als Teleskop ausgebildetes, optisches System hat demnach einen Strahlengang, der folgendes umfasst: einen entlang seiner Achse (A) angeordneten ersten Reflektor (3) zum Reflektieren eines entlang einer optischen Achse (O) einfallenden Strahlenbündels (1) auf einen konvexen zweiten Reflektor (4), der das vom ersten Reflektor (3) erhaltene Strahlenbündel auf einen dritten Reflektor (5) wirft, von dem aus es einem konkaven vierten Reflektor (6) zugeführt wird, um unter einem Winkel zur genannten optischen Achse (O) ausgespiegelt zu werden. Im Strahlengang eines derartigen optischen Systems wird eine solche Einrichtung (5, 7) zur Korrektur der Wellenfrontfehler vorgesehen. Die Achse (A) des ersten Reflektors (3) mit der optischen Achse (O) kann gegebenenfalls einen von 0° abweichenden Winkel (α) einschliessen, durch die Einrichtung (5,7) wird die Korrektur von durch die Winkellage entstehende Asymmetriefehler möglich.
摘要:
A projection optical system for use in a precise copy which uses a pair of catadioptric optical systems (I and II) consisting of convex mirrors (2, 6), concave mirrors (3, 5), and phase correction members (4, 4') is shown. Two catadioptric optical systems (I and II) commonly use an entrance pupil (E, EP) on a coaxis and are coupled so as to respectively face the phase correction members (4, 4'). Each of the concave mirrors (3, 5) has an opening at the center. Each of the convex mirrors (2, 6) has no opening in one embodiment but has an opening portion at the center in another embodiment.