| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Autofocusing device | US2704484D | US2704484A | 1955-03-22 | ||
| 102 | Attachment for varying the magnifying power of telescopes | US49555121 | 1921-08-26 | US1553211A | 1925-09-08 | ARCHIBALD BARR; WILLIAM STROUD |
| 103 | COMPACT STATIONARY LENS OPTICAL ZOOM IMAGE CAPTURE SYSTEM | PCT/US2008084048 | 2008-11-19 | WO2009067524A2 | 2009-05-28 | HE FAN; FRENZER MICHAEL; JOHNSON KEVIN; WANG DONGXUE |
| An electronic optical zoom system (100) includes a first lens assembly (101) and a second lens assembly (102). The first lens assembly (101) and the second lens assembly (102) may be adjacently disposed or concentrically disposed. The first lens assembly (101) and second lens assembly (102), in one embodiment, have different magnification configurations. An image sensor (103) captures electronic images of a subject (109). Optical zoom capability is achieved by an alterable electronic optical device (851), such as a switchable mirror (105). The alterable electronic optical device (851) selectively redirects received light between a first optical path (107) from a reflective surface (106) to a second optical path (117) from the alterable electronic optical device (851) depending upon the state of the alterable electronic optical device (851). The electronic optical zoom system (100) thereby provides optical zoom capabilities in a compact package without the need for physically moving lens assemblies. | ||||||
| 104 | OPTICAL SYSTEM FOR DIGITAL CINEMA PROJECTION | PCT/EP2007001231 | 2007-02-13 | WO2007093378A2 | 2007-08-23 | SCHAUSS UDO |
| The invention relates to an optical system for the projection of digital image data comprising a fixed focal length lens and a pivotable focal length extender. The principal field of application of the invention is digital cinema projection, usually employing the wide-screen format 1.9:1 or the Cinemascope format 2.37:1 (width : height). For format changeover during projection two different fixed focal lengths are realized by the insertion or removal of the focal length extender (1755) into the lens. The projection lens according to the invention has more favourable optical properties than the conventional zoom lenses, such as a minimal chromatic transverse aberration, high telecentricity, very small distortions and a small volume and weight. | ||||||
| 105 | Lens system | US690916 | 1996-08-01 | US5959771A | 1999-09-28 | Takashi Okada; Hideki Nagata |
| A relay lens system which may be used with, e.g., a video camera or still video camera so that these video cameras can use, as the image forming lens, various preexisting interchangeable image forming lenses originally designed for single lens reflex cameras. The image forming lenses which form a first image can have various exit pupils. The entry pupil of the relay lens system can be changed in accordance with each particular exit pupil by selecting one from a plurality of apertures or by a movable aperture. Consequently, a second image can be formed that reproduces the first image while maintaining good quality. | ||||||
| 106 | Scan-range-changing mechanism of a scanner | US42507 | 1998-03-17 | US5946123A | 1999-08-31 | Bob Lin |
| A scan-range-changing mechanism of a scanner includes a scanning-scale ruler, a charge coupled device (CCD), a sliding seat which supports single-axis or two-axis moving capabilities, a plurality of lenses which are rigidly fixed on a sliding seat and located between the scanning-scale ruler and the CCD, and a plurality of scanning labels on the scanning-scale ruler for aligning and focusing the lenses with respect to the CCD. | ||||||
| 107 | Magnification change-over device for camera | US484622 | 1995-06-07 | US5819121A | 1998-10-06 | Takayuki Tsuboi |
| A magnification change-over device is arranged to be highly suitable for a camera of the kind having a photo-taking lens and a viewfinder arranged independently of each other. The device includes the photo-taking lens having an image magnification which is variable; the viewfinder which is arranged to have an image magnification thereof also variable; an operating device for varying the image magnification of the viewfinder; a detecting device for detecting the magnifying state of the viewfinder; and a driving apparatus for driving the photo-taking lens according to a detection signal of the detecting device when a shutter release operation is performed. After a magnification setting operation is performed on the viewfinder, the change-over device changes the magnification of the photo-taking lens according to the magnification of the viewfinder when a photographing operation is actually performed. | ||||||
| 108 | Image magnification apparatus | US802995 | 1997-02-21 | US5801886A | 1998-09-01 | Chun-Gon Lee |
| 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 system for forming an optical image of the object. The apparatus also includes a conversion optical system for magnifying the optical image formed by the objective lens system. The conversion optical system further includes a first biconvex lens unit having a positive refractive power, a second biconvex lens unit having a positive refractive power, and a third biconcave lens unit having a negative refractive power. | ||||||
| 109 | Thermal imaging device | US524448 | 1995-09-06 | US5737119A | 1998-04-07 | Gary Mladjan; Peter Menard |
| A thermal imaging device (10) receives thermal infrared radiation from a viewed scene and responsively provides a visible image replicating the viewed scene. The imaging device (10) has a main housing with an optical aperture (16) at which a lens assembly (12) is attached. The lens assembly (12) has a number of lenses (200, 204, 208, 212, 216) sequentially mounted within a cylindrical housing (146), and defining an optical axis (199). A field-of-view-change mechanism (228) allows a user to select a wide field of view or a narrow field of view. The field-of-view-change mechanism (228) includes a rotatable field-of-view (FOV) ring (226) which rotates a tumbler (210) with a pair of lenses (208, 212) mounted therein. The tumbler (210) is positioned between a first position providing a wide field of view and a second position providing a narrow field of view. A rack (236) cooperates with the FOV ring (226) and the tumbler (210) so that rotation of the FOV ring (226) about a first axis (199) rotates the tumbler about a second axis (210') perpendicular to the first axis (199). An optical alignment mechanism (254) releasably retains the tumbler (210) in the first and second positions so that optical axes (199', 248') of the tumbler are respectively aligned with the optical axis (199) of the lens assembly (12). | ||||||
| 110 | Three field of view refractive infrared telescope with fixed medium filed of view | US363846 | 1994-12-27 | US5548439A | 1996-08-20 | Richard R. Smith |
| An infrared refractive reimaging afocal telescope (10) has an objective lens group (12), an eyepiece lens (14), and a switching lens group (16). The system (10) provides a plurality of magnification modes in a compact arrangement. Diffractive surfaces are provided on at least one of the objective lenses and the eyepiece lens. Also, the system (10) utilizes switching lenses (40, 42, 44, 46) to provide magnification changes. The diffractive surfaces provide chromatic aberration correction. The system provides for excellent image quality in all modes using a minimum number of lens elements. | ||||||
| 111 | Focal length transitional method, auxiliary lens for transiting focal lengths, and lens system and finder having focal length transitional function | US972325 | 1992-11-05 | US5408361A | 1995-04-18 | Noriyuki Iwata |
| A varifocal lens system is constructed by two or more lens groups and has a function for changing a focal length of the lens system by changing a distance between the lens groups while the position of an image face is constantly held. An auxiliary lens constructed by two lens groups having negative and positive refracting powers is inserted into an increased clearance between lens groups in a shortest focal length state such that a lens group having the negative refracting power is located on an object side. The focal length of the lens system is transited to the side of a focal length shorter than the shortest focal length without changing the position of the image face by the insertion of the auxiliary lens. The auxiliary lens can be constructed by a single lens group having negative refracting power. In accordance with the above structure, focal lengths of the varifocal lens system can be transited to each other without increasing an entire length of the varifocal lens system. | ||||||
| 112 | Rear conversion lens | US750699 | 1985-06-28 | US4643536A | 1987-02-17 | Yasuyuki Yamada; Yasuhisa Sato; Hiroki Nakayama; Kouji Oizumi |
| A conversion lens upon attachment on the image side of a master lens increases the focal length of the entire system. The conversion lens comprises three components of negative, positive and negative powers in this order from the front, has a negative power as a whole, and satisfies the following conditions:2.0<f1/f3<4.00.8<.vertline.f2/f3.vertline.<1.2n1-n2>0.15where fi and ni are the focal length and the refractive index of the glass of the i-th component counting from the front respectively. | ||||||
| 113 | Variable magnification ratio lens | US166798 | 1980-07-08 | US4427268A | 1984-01-24 | Keiji Ikemori |
| Disclosed is a view finder for a reflex camera, so designed that the view finder is provided with an objective lens group L1, the fixed lens group L2 and the eye piece lens L3 in sequence, whereby the distance between the front lens group and the fixed lens group is constant and there is provided a first dismountable attachment lens in front of the objective lens group and a second dismountable attachment lens at the back of the objective lens group. The sign of the refractive power of the first and the second attachment lens is inverse to that of the objective lens group. The first attachment lens and the objective lens group and the objective lens group and the second attachment lens respectively form a substantial afocal lens system. | ||||||
| 114 | Lens system with fill-in lens | US296649 | 1981-08-27 | US4394071A | 1983-07-19 | Yasuyuki Yamada |
| A lens system having a main photo-taking lens with a fill-in lens detachably set in between the main photo-taking lens and the image plane to change the focal length of the entire system. This fill-in lens has, from front to rear, a positive 1st lens element, a negative 2nd lens element and a positive 3rd lens element. The glass of the positive 1st lens element and the lens form and glass of the positive 3rd lens element are properly chosen to minimize the bulk and size, while still achieving improvements of the image quality. | ||||||
| 115 | Zoom lens system having a plural number of relay lenses | US78769 | 1979-09-25 | US4330180A | 1982-05-18 | Kazuo Tanaka |
| The disclosed invention involves a zoom lens system having a plural number of pick-up tubes whose picture sizes are different from each other, a zoom section which is mounted at the object end of each of the pick-up tubes and which has a focusing front lens group, a variator and a compensator for zooming and a number of relay lenses which have respective focal lengths corresponding to the picture size of each of the pick-up tubes. Each of the relay lenses can be mounted between the zoom sections and one of the pick-up tubes. Each of the relay lenses consists of a primary group and a secondary group and a common attachment lens can be mounted in each of the relay lenses. The distance between the zoom section and the pick-up tube is maintained constant without changing the focus whether the attachment lens is mounted or not. | ||||||
| 116 | Optical adaptor for movie and television cameras | US959077 | 1978-11-09 | US4264151A | 1981-04-28 | Yukio Okano |
| An optical adaptor is provided to permit objective lenses designated for a certain image format to be used on optical devices having a smaller image format. Thus, 35 mm single lens reflex camera lenses can be mounted on a cinematographic camera and a T.V. camera. The optical adaptor includes a pair of mounts for attachment respectively to the objective lens and to the optical device. Mounted within the adaptor housing is a positive refractive lens system capable of shortening the focal length and increasing the aperture ratio of the objective lens system. The lens system satisfies the condition that the magnification, .beta., is equal to or less than 1 and the refractive power of a negative element lens .PSI..sub.1 to that of a positive element lens, .PSI..sub.2, in the lens system, satisfies the following;(4/.beta.)-4.5.ltoreq..vertline..PSI..sub.2 /.PSI..sub.1 .vertline..ltoreq.(4/.beta.)-3 | ||||||
| 117 | Lens selection device | US872515 | 1978-01-26 | USRE30231E | 1980-03-18 | Hiroshi Ikeda |
| A lens selection device for placing any one of three or more magnification lenses in an operative position where its optical axis aligns with a respective reference axis, a selected lens being shifted along a fixed path from a retracted position to the operative position thereof by separate drive means numbering one less than the quantity of the lenses. In the case of three lenses, for instance, a first drive means is used to shift a first lens, a second drive means is used to shift a second lens, and a follower means coupled with a third lens is used to shift it to its operative position when the first (or the second) lens is driven to its retracted position. | ||||||
| 118 | Cineconversion machine | US29724172 | 1972-10-13 | US3867022A | 1975-02-18 | WHATLEY THOMAS JEFFERSON; DRENNEN JR WILLIAM MILLER |
| To record a composite picture on a film, a transparency support, a pair of condensing lenses and a mounting for a lighttransmissive object are serially disposed between a pair of coaxial objectives forming part of a projector and a camera, respectively. The condensing lenses are of unequal lengths, the one of larger focal length being disposed on the side of the projection objective. The magnification ratio can be changed by the use of a zoom lens in either objective or by concurrent displacement of both objectives relative to the transparency support and the condensing lenses.
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| 119 | Compact optical system permitting an instantaneous increase in magnification without refocussing | US3645602D | 1970-05-08 | US3645602A | 1972-02-29 | CLAVE SERGE; CLAVE MARCEL |
| Optical system comprising a Barlow amplifier and adapted to make it possible to change the magnification of an image formed by an objective without displacing the image by varying the length of the optical path travelled in dependence upon the enlargement of said image. This optical device is characterized by the fact that it comprises an assembly of reflecting plane surfaces some of which are pivotally mounted so as to permit an increase in the number of reflections undergone by said rays at the same time as said magnification. The device is particularly applicable to telescopes and to binoculars, which may be provided with means for increasing their stereoscopic effect.
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| 120 | Optical profile projection systems | US3552832D | 1969-10-27 | US3552832A | 1971-01-05 | DEMAINE DAVID |
| AN OPTICAL PROFILE PROJECTOR HAVING AN AFOCAL OPTICAL OBJECTIVE PROVIDING TELECENTRIC PROJECTION, WHICH COMPRISES FOUR COMPONENTS ARRANGED IN TWO PAIRS SYMMETRICAL WITH RESPECT TO A CENTRAL DIAPHRAGM, THE INNER AND OUTER COMPONENTS OF THE RESPECTIVE PAIRS BEING SIMULTANEOUSLY AND RELATEDLY MOVABLE IN SUCH A MANNER AS TO MAINTAIN THE SYMMETRY OF THE ARRANGEMENT, THE LAWS OF MOVEMENT BEING SUCH AS TO PROVIDE VARIATION OF THE OBJECT PLANE/
IMAGE PLANE DISTANCE WHILST MAINTAINING CONSTANT THE OVERALL MAGNIFICATION OF THE OBJECTIVE, THE LATTER PREFERABLY BEING SIMULTANEOUSLY SUBJECTED TO AN OVERALL MOVEMENT IN ORDER ALSO TO MAINTAIN CONSTANT THE POSITION OF THE IMAGE PLANE. |
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