Matches 1 - 50 out of 78 1 2 >
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7411201 Projection objective for a microlithographic projection exposure apparatus  
A projection objective of a microlithographic projection exposure apparatus has a last optical element on the image side which is plane on the image side and which, together with an image plane of...
7310187 Projection objective, especially for microlithography, and method for adjusting a projection objective  
A method of adjusting a projection objective permits the projection objective to be adjusted between an immersion configuration and a dry configuration with few interventions in the system, and...
7289272 Optical system including an anamorphic lens  
An optical system includes a primary lens group having a central beam path therethrough and including a front lens group and a rear lens group. An anamorphic lens group lies on the central beam...
7236305 Zoom lens and image pickup apparatus having the same  
A zoom lens in which a precise focus detection signal can be detected while a user can observe an image to be shoot without being affected by insertion/removal of an extender lens into an optical...
7209292 Projection objective, especially for microlithography, and method for adjusting a projection objective  
A method of adjusting a projection objective permits the projection objective to be adjusted between an immersion configuration and a dry configuration. The projection objective includes optical...
7170689 Front converter lens  
A converter lens includes a front unit and a rear unit disposed on an image side with respect to the front unit. The front unit has positive optical power and includes two positive lens elements....
7057827 Zoom lens and pickup system  
A zoom lens includes first to fourth lens units arranged in order from an object, respectively. The first lens unit is fixed during power-varying and has positive optical power. The second lens...
6995920 Anamorphic converter  
To obtain an anamorphic converter of the rear converter system which is especially most suitable for a converter for the cinema and excellent in optical performance, and in which an effective image...
6831730 Optical magnification adjustment system and projection exposure device  
An optical magnification adjustment system being capable of minutely correcting magnification. A first lens 1 of plano-convex is installed on the side of an object surface 5 , and a second lens ...
6738195 Optical magnification adjustment system and projection exposure device  
An optical magnification adjustment system being capable of minutely correcting magnification. A first lens 1 of plano-convex is installed on the side of an object surface 5 , and a second lens ...
6690518 Camera-attachment lens system  
A camera-attachment lens system includes a positive condenser lens system and a positive image-forming lens system, and satisfies the following conditions: 1.5< fa/fco< 2.4 (1) 0.08<...
6654179 Wide converter lens system for both underwater and above-water use  
A wide converter lens system includes an assembly of two or more specified kinds of lens units and a meniscus concave lens to be attached in front of this assembly. The frame for this assembly is...
6556355 Mount conversion adaptor lens  
An adaptor lens is provided for attachment between a lens of a camera and a camera body, in order to provide the camera with adaptor lens attached, a smaller effective screen size than the camera...
6556354 Optical adapter for mounting camera lenses on a video camera  
Optical adapter for adapting cine-camera objective to video camera, which includes spectral splitter of light into three spectral bands, and three receivers each associated with one spectral band,...
6480339 Corrective lens for rifle scope  
A corrective lens for a rifle scope comprising a removable flexible tubular boot attachable to an end of the scope and having a corrective lens suited to the user to eliminate the wearing of...
6400515 Taking optical system, image taking apparatus, and method for converting frame-format in a taking optical system  
A method of converting a frame-format in a taking optical system comprises steps of arranging a plurality of lens units constituting the taking optical system except for the lens unit disposed at...
6373638 Image taking optical system and reduction optical system  
A reduction optical system for reducing an image without re-forming the image formed by a main optical system, such as a zoom lens system, wherein the lens having the strongest positive optical...
6307683 Zoom lens  
A zoom lens for television broadcasting cameras suitable for both regular and high definition television (HDTV) format cameras is disclosed. The zoom lens is formed of a zoom lens main body having...
6288847 Attachment lens system  
An attachment lens optical system for extending a focal length of a camera lens and balancing axial chromatic aberrations of the camera lens comprises, in order from the object side, a first lens...
6212016 Telescopic objective lens system  
A telescopic objective lens system comprises a positive first lens group and a second lens group, in this order from the object. The second lens group comprises a first sub-lens group and a second...
6134389 Camera capable of varying size of image plane  
In a camera of the kind arranged to obtain an object image through a photo-taking lens at an arbitrary image plane size on a photosensitive surface by using an image plane size varying member,...
6124981 Attachment lens having diffraction surface  
An attachment lens satisfactorily corrects aberrations by using a diffraction surface. The attachment lens is installed on an image surface side of a master lens unit (M) serving as a photographic...
6058269 Oscillation isolating attachment lens system  
An attachment lens optical system equipped with an oscillation isolating feature for extending a focal length of a camera lens comprises, in order from the object side, a negative power first lens...
5801886 Image magnification apparatus  
An image magnification apparatus, for use in a video display system that displays an image of an object, comprising a connecting module for connecting the image magnifying apparatus to a lens...
5765049 Optical apparatus having lens system change-over mechanism  
An optical apparatus includes an optical unit which is arranged to be inserted into and retracted from an optical path, a fixed tube, and a restricting member which is disposed at the fixed tube...
5726809 Camera system and an optical adapter to reduce image format size  
A rear attachment is provided to permit objective lens systems designated for a certain image format to be used for imaging on a smaller image format. Thus, a 35 mm single lens reflex camera lens...
5589976 Telescope with rear converter and rear conversion lens and telescope  
A telescope includes a master telescope whose aberration has been independently corrected and which has an objective lens and an ocular lens. A rear conversion lens is provided on the image side of...
5499069 Camera system and an optical adapter to reduce image format size  
A rear attachment is provided to permit objective lens systems designated for a certain image format to be used for imaging on a smaller image format. Thus, a 35 mm single lens reflex camera lens...
5452133 Variator optical system  
An afocal optical module simulator (aoms) for use in conjunction with one or two other optical modules to simulate an afocal variator optical system. The aoms is comprised of an optical module...
5349474 Rear converter lens  
The invention is directed to a compact rear converter lens that has a high zoom ratio of the order of 1.7 to 2.0, is corrected in terms of various aberrations in a well-balanced manner, is little...
5253112 Rear conversion lens  
The rear conversion lens of the present invention is compact and maintains an excellent imaging performance even when it is mounted on a telephoto objective lens the enlargement magnification of...
5218475 Attachment lens system  
An attachment lens system comprising, in the order from the object side, a first lens unit having a positive refractive power and a second lens unit having a negative refractive power; having a...
5182671 Variable magnification optical system having a capability of stabilizing the image  
An image stabilization optical system for use in the variable magnification optical system having a first lens group followed rearwardly by a zoom section comprising a plurality of lens groups is...
5086355 Focal length changeable lens system  
The present invention provides a focal length changeable lens system which comprises a master lens group of a positive refractive power having at least one negative lens element made of a synthetic...
5082360 Compound zoom lens  
A compound zoom lens optical system includes a variable focal length photographing lens consisting of a first lens group having a positive refracting power, and a second lens group having a...
5050971 Variable focal length photo-taking optical system  
A variable focal length photo-taking optical system includes a photo-taking objective lens, and a conversion lens removably added to the photo-taking objective lens and relatively movable along the...
5032012 Rear converter lens system  
A rear converter lens system comprising, in the order from the object side, a first lens component having positive refractive power and a second lens component having negative refractive power, and...
4983026 Focal length changeable lens system  
The present invention provides a focal length changeable lens system which comprises a master lens group of a positive refractive power having at least one negative lens element made of a synthetic...
4913537 Vari-focal lens system with switchable auxiliary lens units  
A vari-focal lens system with switchable auxiliary lens units comprising a master lens system, an auxiliary lens unit removably arranged after the master lens system and another auxiliary lens unit...
4900141 Rear conversion lens  
A rear conversion lens which is to be mounted between a main lens and a predetermined image plane for attaining a larger resultant focal distance than a focal distance of the main lens basically...
4871238 Photographic optical device with variable magnification  
A photographic optical device of this invention comprises: a master lens unit having a positive refractive power, determining a photographic optical path and moving along the optical axis to change...
4832470 Inverted galilean telescope type viewfinder system capable of changing over the magnification  
A viewfinder system capable of changing over the magnification includes an objective lens unit having at least two negative lens elements replaceable with each other for magnification change-over,...
4830474 Variable magnification optical system  
A changeover type variable magnification optical system whose focal length is changed by locating an auxiliary lens on the image side of a master lens assembly. The system satisfies following...
4830473 Rear conversion lens system  
Disclosed is a compound lens system consisting of a main lens system and a rear conversion lens system located at the image side of the main lens system, wherein the rear conversion lens system...
4810071 Variable focal length lens system  
A variable focal length lens system comprising a first lens unit which comprises a negative meniscus lens and a positive lens, a second lens unit which comprises a negative lens, and a third lens...
4770508 Conversion lens releasably attached behind master lens  
A conversion lens for attachment to the rear of a master lens to increase the focal length of the entire system, includes a positive lens, and a negative lens positioned on the image side of the...
4749263 Rear conversion lens system  
A rear conversion lens system which is removably inserted behind an objective lens of a pseudo telephoto camera upon photographing in a trimming mode is inserted for acquiring a print on which the...
4743101 Rear-attachment lens system  
A rear attachment lens mounted between a master lens and an image plane for increasing the composite focal length. It consists of four lenses. The first lens is negative and has a concave surface...
4741605 Multifocal objective  
The present invention relates to an image-forming objective which is capable of forming sharp images of objects at at least two different distances from the objective, there being arranged at one...
4728179 Rear conversion lens system  
A rear conversion lens system to be used for varying the focal length being inserted to the space between an objective for a single-lens reflex camera and film surface, the rear conversion lens...
Matches 1 - 50 out of 78 1 2 >