| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Photographic lens. | US1899740776 | 1899-12-18 | US756779A | 1904-04-05 | DALLMEYER THOMAS RUDOLPHUS |
| 182 | Projection zoom lens system and projector apparatus | US363070 | 1999-07-28 | US6147812A | 2000-11-14 | Syuji Narimatsu; Jeffrey A. Gohman |
| A projection zoom lens system of the present invention for projecting image onto a screen from a light modulator such as a DMD includes a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged in this order from the screen side. An outer diameter LD of the last lens and a back focus at the wide-angle end Bfw of the projection zoom lens system satisfy the condition below.0.3<LD/Bfw<0.5 (A).Further, at least one of surfaces of the last lens is aspheric. Therefore, even though the back focus is long and a diameter of the last lens is small, it is possible to provide a compact projector lens system having excellent optical performance with the only nine lenses arrangement. | ||||||
| 183 | Multi-axis optical lens | US650889 | 1996-05-17 | US5784209A | 1998-07-21 | Yuji Manabe |
| An optical lens is disclosed that is suitable for use in a line scanner or analogous device. The lens has multiple optical axes individually corresponding to a respective refractive combination comprising a first and an opposing second refractive surface. The lens is movable, preferably by rotation about an axis, relative to an axis of light propagation so as to permit selection of a desired refractive combination by aligning the optical axis of the refractive combination with the axis of light propagation. | ||||||
| 184 | All-reflective zoom optical system | US348618 | 1989-04-24 | US5144476A | 1992-09-01 | Reynold S. Kebo |
| The present optical system provides an all-reflective zoom optical system (10, 12, 14,16 and 60, 62, 64). An imaging mechanism including one or more movable mirrors (12, 14, 16 and 60, 62) is utilized to effect the change in the magnification, field of view or both of the system. | ||||||
| 185 | Aperture structure in zoom lens | US318099 | 1981-11-04 | US4473278A | 1984-09-25 | Yoshihiro Hama |
| A separate set of aperture blades is provided for varying the maximum full aperture of a zoom lens as its magnification is changed. The second set of aperture blades are pivotally mounted to a support plate which also rotatably supports the conventional aperture blades. | ||||||
| 186 | Information transmission means in an intermediate lens tube for camera | US256135 | 1981-04-21 | US4326788A | 1982-04-27 | Sachio Ohmori; Kunihiro Fukino; Sunao Ishizaka |
| An intermediate lens tube to be mounted between an interchangeable lens and a camera body is provided with means for transmitting an information signal from the interchangeable lens to the camera body. Said information transmission means includes correction means for transmitting a corrected information signal to the camera body only when vignetting takes place in the intermediate lens tube. | ||||||
| 187 | Focus device for zoom lens | US27638 | 1979-04-06 | US4210387A | 1980-07-01 | Ryota Ogawa |
| A focus device for a zoom lens having a mounting barrel focus member and a variator member. A stopper defines a short distance limit stop position. The stopper moves in cooperation with the variator member so that in a particular range of a focal distance of the zoom lens, the short distance photographing limit is advanced to allow extreme close-up photography. | ||||||
| 188 | Zoom lens with movable diaphragm | US750828 | 1976-12-15 | US4141636A | 1979-02-27 | Masatoshi Shimojima |
| A mechanism for a zoom lens of the type in which the aperture defining diaphragm mechanism moves axially of the lens and changes the position of the exit pupil, where the mechanism modifies the aperture with changing focal length to maintain constant relative aperture at full relative aperture and further predetermines the stop down of the diaphragm mechanism as a function of selected relative aperture and focal length. | ||||||
| 189 | Variable magnification lens system using symmetric lens of variable focal length | US466601 | 1974-05-03 | US4037937A | 1977-07-26 | Kazuo Minoura |
| A variable magnification optical system comprising a stationary lens element and a movable lens element which when varying the focal length of the variable magnification optical system, are moved always in a relationship symmetric with respect to the center of the variable magnification optical system so as to effect a desired magnification. | ||||||
| 190 | Rear converter lens | US40974573 | 1973-10-25 | US3877796A | 1975-04-15 | YABE SHINJI; SEIYAMA KAORU |
| Rear converter lens to be attached behind a master lens. The rear converter lens consists of six groups of lens component, wherein the first lens component is of negative refractive power; the second lens component, positive refractive power; the third lens component, negative refractive power; the fourth lens component, positive refractive power; the fifth lens component, negative refractive power; and the six lens component, positive refractive power.
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| 191 | Projection lens with add lens elements | US34333173 | 1973-03-21 | US3817599A | 1974-06-18 | MC CROBIE G |
| A projection lens for operation between fixed conjugates includes a pair of add lenses for selective combination with the basic lens for changing the magnification of the system. The basic lens operates at unity magnification, with one add lens at 0.74X and with the other add lens at 0.65X magnifications.
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| 192 | Image rotation device for an infrared scanning system or the like | US32040273 | 1973-01-02 | US3813552A | 1974-05-28 | JOHNSON R |
| An infrared scanning system which does not require the use of scanning mirrors is disclosed. A cylindrical device having two cylindrical optical elements arranged in an afocal manner forms an image at infinity. As the cylindrical device is rotated about its longitudinal axis the image is rotated about the longitudinal axis at twice the rotational rate of the rotation of the device. A lens system focuses infrared energy radiating from the scene on an array of detectors supported at one end of a support member. An array of emitters is mounted on the opposite end of the support member and the electronics necessary to interface the detector array with the emitters is mounted on the outer surface of the support member. The central portion of the support member also includes a mechanical cryogenic refrigerator for cooling the detector array. A television camera is focused on the emitter array to produce a television image of the scene scanned.
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| 193 | Device for zoom lenses | US3765751D | 1970-12-21 | US3765751A | 1973-10-16 | NOGUCHI Y |
| A ZOOMING DEVICE FOR ZOOM LENSES IS PROVIDED WITH A ZOOMING COMPONENT AND A COMPENSATING COMPONENT WHICH ARE MOVED IN THE OPTICAL AXIS DIRECTION TO BE ADJUSTED, WHEREIN TWO GUIDE RODS ARE PROVIDED ON ONE SIDE IN THE LENS BARREL. A ZOOMING COMPONENT FRAME FORMED WITH A SLOT AT RIGHT ANGLES TO THE OPTICAL AXIS DIRECTION IS FITTED SLIDABLY ON ONE OF THE RODS, AND A COMPENSATING COMPONENT FRAME PROVIDED WITH AN ENGAGE PIN IS FITTED ON THE OTHER ROD. A CAM PLATE PROVIDED WITH A WORKING PIN FITTED IN SAID SLOT AND A CAM SLOT IN WHICH SAID ENGAGE PIN FITS IS PIVOTED ROTATABLY ON THE LENS BARREL BY A SHAFT AT RIGHT ANGLES TO THE OPTICAL AXIS AND SAID SLOT. THEREFORE, BY TURNING SAID CAM PLATE, SAID ZOOMING COMPONENT FRAME AND SAID COMPENSATING COMPONENT FRAME ARE ADJUSTABLY MOVED TO CHANGE THE MAGNIFICATION.
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| 194 | Multiple purpose field increasing optical device | US3761162D | 1971-10-12 | US3761162A | 1973-09-25 | HALL J |
| A multiple purpose optical device that may be selectively and removably attached to engageable means on either the forward portion of a camera housing containing shutter means and a light sensitive film or engageable means on the forward portion of a projector containing a light source and a holder for said film after the film has been exposed and developed. The device when mounted on a camera as above described laterally compresses the light image to which the film is exposed and increases the field of said camera as a result thereof. The device when mounted on said projector laterally expands the developed image on the film as said developed image is reproduced, with the compression and expansion being to such a degree as to nullify one another and provide a non-distorted and natural reproduction of said developed image on a projection receiving surface.
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| 195 | Variable-magnification afocal optical lens system | US3620602D | 1970-08-03 | US3620602A | 1971-11-16 | KAWAZU MOTOAKI |
| A variable-magnification afocal optical lens system for use in combination with a focusing lens system such as used in small motion-picture cameras and projectors, having, for example, a focal length of 15.5 mm., back focal length of 11.0 mm., f-number of 1.8 and maximum image height of 3.5 mm., to permit varying the focal length from 10 to 30 mm. with a back focal length of 11.0 mm. and f-number of 1.8. The afocal system comprises an array of seven elements in three groups with the second group consisting of cemented positive and negative meniscus lenses and an individual negative meniscus lens, having strong diverging power with a compound focal length of -18.88 mm., so that the image errors of the first group are well compensated and the image errors of the whole system are minimized upon shifting, thus permitting the system to be made as compact as a conventional afocal lens system.
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| 196 | Compact afocal magnifying lens | US3604786D | 1969-07-22 | US3604786A | 1971-09-14 | BAKER JAMES G |
| Compact six-element afocal magnifying lenses suitable for use as attachments to photographic objective lenses are described. The overall length of an afocal lens designed according to this invention is less than the focal length of the photographic objective lens with which it is to be associated. Magnifications as high as 2 power are attainable. Three elements are arranged in a positive front group, separated by a large air space from the other three elements which are arranged in a negative rear group. The outer elements in each group of three have higher Abbe values than the inner element of their respective group. High refractive indices are employed in the negative elements and moderate refractive indices in the positive elements. Chromatic and spherical aberrations, coma, astigmatism, field curvature, and distortion can be corrected. An aspheric surface is used.
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| 197 | Optical dual magnification system | US3459464D | 1966-01-25 | US3459464A | 1969-08-05 | SMITH FRANCIS HUGHES |
| 198 | Telescopic sight with variable enlargement and optical joint | US38626864 | 1964-07-30 | US3383151A | 1968-05-14 | HORST KOHLER; ROLAND LEINHOS |
| 199 | Afocal varifocal supplementary objective | US33305563 | 1963-12-24 | US3326622A | 1967-06-20 | TRUDE MUSZUMANSKI; BERTA MIKUSCH |
| 200 | Two component afocal wide-angle supplementary objective | US18343062 | 1962-03-29 | US3227041A | 1966-01-04 | TRUDE MUSZUMANSKI |
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