Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8189268 | Lens unit A lens unit is equipped with a lens, through which light from an object enters, and a lens barrel for holding the lens. An optical extending member is employed when observing a focal image of the lens with a microscope. A receiving portion having a receiving surface... | 05/29/2012 |
| 8027097 | Rear attachment lens and image-forming optical system using the same A rear attachment lens detachably attached to an image side of a main lens system to change a focal length of an entire system so as to become longer than a focal length of the main lens system includes one or more positive lenses GMp. One among the one or more posi... | 09/27/2011 |
| 7593163 | Rear converter lens apparatus and taking system comprising the same The invention relates to a rear converter lens apparatus to obtain a lens system having a focal length longer than that of a master lens device by the mounting of the master lens device, and a taking system comprising the same. A converter lens portion consists of, ... | 09/22/2009 |
| 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 the projection objective, delimits an immersion space in the directio... | 08/12/2008 |
| 7327953 | Zoom lens and imaging device A zoom lens with a reduced thickness and size in the depthwise direction consists of a plurality of lens groups (GR1 to GR5), so that it varies in power in response to variation in intervals between the lens groups. The zoom lens also has a prism G2... | 02/05/2008 |
| 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 therefore to be used optionally as an immersion objective or as a dry ob... | 12/18/2007 |
| 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 path and is positioned between the front lens group and the rear lens gr... | 10/30/2007 |
| 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 axis. A relay lens unit stationary during zooming includes lens unit L... | 06/26/2007 |
| 7212352 | Cam mechanism of a lens barrel A lens-barrel cam mechanism includes first and second ring members; and cam grooves and cam followers formed on the first and second ring members. A single groove/follower set, including one cam groove and one cam follower, and a groove/follower group, including fro... | 05/01/2007 |
| 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 elements arranged along an optical axis thereof, which include a first ... | 04/24/2007 |
| 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. The two positive lens elements are spaced apart. The rear unit has neg... | 01/30/2007 |
| 7158311 | Interchangeable lens system A lens system is provided. The lens system includes a first lens system moveable between a first position removed from an optical axis and a second position on the optical axis. The first lens system includes a first lens element, an aperture stop, and a second lens... | 01/02/2007 |
| 7136237 | Optical system Provided is an optical system, in which various aberrations including chromatic aberrations are preferably corrected and which is easily manufactured and has a superior environmental resistance, comprising a solid material (GIT1) having two surfaces both on a... | 11/14/2006 |
| 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 unit is movable during power-varying. The third lens unit is movable so ... | 06/06/2006 |
| 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 surface of an imaging optical system can be sufficiently utilized. T... | 02/07/2006 |
| 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 2 of concave-plano is installed on the side of a for... | 12/14/2004 |
| 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 2 of concave-plano is installed on the side of a for... | 05/18/2004 |
| 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:... | 02/10/2004 |
| 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 detachably attachable to a watertight underwater housing co... | 11/25/2003 |
| 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, the three receivers having the same format, the distance b... | 04/29/2003 |
| 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 without the adaptor lens attached. The adaptor lens is form... | 04/29/2003 |
| 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 eyeglasses while sighting through the scope. The lens can fit wi... | 11/12/2002 |
| 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 the object-side end or at the image-side end and determinin... | 06/04/2002 |
| 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 power within the reduction optical system satisfies the follo... | 04/16/2002 |
| 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 four lens groups and a supportive lens attachment that may... | 10/23/2001 |
| 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 group having a negative power single lens element, a second... | 09/11/2001 |
| 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 sub-lens group, wherein the first sub-lens group is combin... | 04/03/2001 |
| 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, either the nearest shootable distance of the photo-taking lens... | 10/17/2000 |
| 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 optical system, and it extends a focal length of the maste... | 09/26/2000 |
| 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 group having three lens elements, a negative power second ... | 05/02/2000 |
| 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 module of the video display system, and an objective lens syste... | 09/01/1998 |
| 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 and restricts a position of the optical unit in a direction ... | 06/09/1998 |
| 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 can be used to create an image on a smaller format CCD arra... | 03/10/1998 |
| 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 the objective lens of the master telescope and is made of... | 12/31/1996 |
| 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 can be used to create an image on a smaller format CCD arra... | 03/12/1996 |
| 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 having a front and a rear end, and includes a movable negative... | 09/19/1995 |
| 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 affected by production errors, and is made so compact that ... | 09/20/1994 |
| 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 whose focal length is relatively high, e.g. about double and... | 10/12/1993 |
| 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 negative refractive power as a whole; and adapted in such a m... | 06/08/1993 |
| 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 disclosed, wherein as at least one lens group in the zoom s... | 01/26/1993 |
