摘要:
A catoptric projection optical system for projecting a reduced size of a pattern on an object plane onto an image plane includes first, second, third and fourth mirrors from the image plane along an optical path, wherein the third and fourth mirrors are located between the first mirror and second mirror.
摘要:
A projection optical system which can project a bright image with less distortion and a small projection distance without causing aberration or an increase in size of reflective surfaces is disclosed. The projection optical system projects luminous flux from an original image onto a projection surface which is oblique to a central principal ray which is a principal ray of luminous flux traveling from the center of the original image to the center of a projected image. The projection optical system comprises a refractive optical system which includes a plurality of refractive optical elements through which the luminous flux from the original image passes through, and a reflective optical system which includes a plurality of reflective surfaces each having an optical power and guides the luminous flux emerging from the refractive optical system to the projection surface.
摘要:
This specification discloses an optical system provided with a first optical part disposed most adjacent to the object side, the optical part having three or more optical surfaces, of which at least one is a reflecting surface, and an aperture stop disposed more adjacent to the image side than the first optical part, wherein when the spacing from the first optical surface to the third optical surface as counted from the object side of the first optical part is defined as D and the spacing from the first optical surface to the entrance pupil at an azimuth ξ degrees is defined as X(ξ), the following condition is satisfied: (X(0) + X(90))/2 The specification also discloses an optical apparatus provided with such optical system.
摘要:
Provided is an optical element that is compact, capable of securing an optical path length, and allows an improvement in manufacturing precision without inviting cost increases. An optical element of the present invention includes a transparent member having a first refracting surface, a second refracting surface, and a plurality of reflecting surfaces. The transparent member is capable of causing light, which enters the transparent member from the first refracting surface, to be reflected by the plurality of reflecting surfaces and guided to the second refracting surface. An optical path from the first refracting surface leading to the second refracting surface crosses itself inside the transparent member when seen from a direction that is substantially perpendicular to both incident light on the first refracting surface and light exiting from the second refracting surface. The transparent member is capable of guiding the incident light from the first refracting surface to the second refracting surface while reflecting the incident light alternately by at least one first reflecting surface and at least one second reflecting surface, the at least one first reflecting surface being at least one reflecting surface of the plurality of reflecting surfaces which is disposed within a first region, the at least one second reflecting surface being at least one reflecting surface of the plurality of reflecting, surfaces which is disposed within a second region, the first region and the second region being regions on one and the other sides, respectively, of a first plane passing through the transparent member which is taken as a boundary.
摘要:
A catoptric projection optical system that projects a reduced size of a pattern on an object surface onto an image surface and for serving as an imaging system that forms an intermediate image between the object surface and image surface, and includes six or more mirrors, wherein a position of an exit pupil with respect to the intermediate image is located between the object surface and image surface, and wherein the largest angle between principal rays and an optical axis for angles of view at the position of the exit pupil is sin -1 NA or smaller, where NA is a numerical aperture at the side of the image surface.
摘要:
This specification discloses an optical system provided with a first optical part (B1) disposed most adjacent to the object side, the optical part (B1) having three or more optical surfaces, of which at least one is a reflecting surface, and an aperture stop (R14) disposed more adjacent to the image side than the first optical part (B1), wherein when the spacing from the first optical surface (R1) to the third optical surface (R3) as counted from the object side of the first optical part (B1) is defined as D and the spacing from the first optical surface (R1) to the entrance pupil at an azimuth ξ degrees is defined as X(ξ), the following condition is satisfied:(X(0) + X(90))/2 The specification also discloses an optical apparatus provided with such optical system.
摘要:
A catoptric projection optical system for projecting a pattern on an object surface onto an image surface includes plural mirrors, wherein a second mirror from the image surface through the optical path receives convergent pencil of rays, and has a paraxial magnification of -0.14 or smaller.
摘要:
A catoptric projection optical system for projecting a reduced size of a pattern on an object plane onto an image plane includes first, second, third and fourth mirrors from the image plane along an optical path, wherein the third and fourth mirrors are located between the first mirror and second mirror.
摘要:
With a view to provide a projection optical system using an oblique projection method which contrives the downsizing of an apparatus and yet secures a ratio of quantity of marginal light and which is high in the enlarging rate, and a projection type displaying apparatus using the same, a projection optical system for guiding a beam from an image display panel onto a screen surface inclined relative to a reference axis, and forming image information on the screen surface has a reflecting optical system which has a plurality of rotation-asymmetrical reflecting surfaces having curvatures, and in which the beam from the image display panel is reflected by the plurality of rotation-asymmetrical reflecting surfaces and is guided onto the screen surface, and a stop is provided between the plurality of rotation-asymmetrical reflecting surfaces of the reflecting optical system or between the reflecting optical system and the image display panel, and the stop is set so as to be imaged at a negative magnification by an optical member disposed more adjacent to the screen than the stop position.