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| Number | Title | Issue Date |
| 6600609 | Inner-focus-type lens A lens having a long focal length that is suitable for photography with a large film size is disclosed having three lens groups of positive, negative, and positive refractive power, in order from the object side, as follows: a first lens group having a po... | 07/29/2003 |
| 6600610 | Standard photographic lens A standard photographic lens is disclosed that includes a front lens group, a diaphragm stop, and a rear lens group, in order from the object side. The front lens group is formed of a negative meniscus lens with its convex surface on the object side, and ... | 07/29/2003 |
| 6580564 | Wide-angle zoom lens and projection-type display unit using it A wide-angle zoom lens is disclosed having five lens groups of negative, positive, positive, negative, and positive refractive power, respectively, in sequential order from the magnification side. The first lens group is fixed during zooming and is formed... | 06/17/2003 |
| 6577456 | Single focus lens A single focus lens formed of only two lens groups, both of positive refractive power, with each lens group being formed of only a single lens. The lens of the first lens group has at least one of its surfaces aspherical, and the lens element of the secon... | 06/10/2003 |
| 6577451 | Rear conversion lens A rear conversion lens, for attachment to the rear of a main lens, is formed of only three lens groups of positive, negative, and positive refractive power, respectively, in order from the object side. The first lens group is formed of a first lens elemen... | 06/10/2003 |
| 6560012 | Microscope apparatus and method Microscope apparatus and a method are disclosed for avoiding a reduction in intensity at the periphery of a microscope image that is detected by an electronic image-detector and then displayed. The method includes inserting one or more stops along the opt... | 05/06/2003 |
| 6552851 | Achromatic beam shaping prism An achromatic beam shaping prism is disclosed which compensates for a fluctuation in oscillating wavelength of a semiconductor laser source of a recording type optical disc system using a single prism having a diffraction grating with a specified pitch so... | 04/22/2003 |
| 6542316 | Wide-angle projection lens and a projection-type image display device A wide-angle projection lens is disclosed having three lens groups of negative, positive, and positive refractive power, respectively, in order from the enlarging side, and that favorably corrects both distortion and lateral color. The wide-angle projecti... | 04/01/2003 |
| 6542310 | Wide converter lens An afocal, wide converter lens is provided in order to shorten the focal length of a main lens, thereby shortening the projection distance that is needed to fully illuminate a given screen size when the wide converter lens is attached to the enlarging sid... | 04/01/2003 |
| 6522453 | Projection device and a projection lens A projector device is disclosed which uses light that is spatially modulated by a DMD having mirrors which are moveable between Off and On positions in response to image information input to the DMD. Images formed at the DMD are projected onto a screen vi... | 02/18/2003 |
| 6519097 | Gaussian lens for photography A Gaussian lens for photography includes, in order from the object side, a front lens group, a stop, and a rear lens group. The front lens group is formed of, in order from the object side, a first lens element and a second lens element, each of positive ... | 02/11/2003 |
| 6516652 | Design of viscoelastic coatings to reduce turbulent friction drag A method is provided to select appropriate material properties for turbulent friction drag reduction, given a specific body configuration and freestream velocity. The method is based on a mathematical description of the balance of energy at the interface ... | 02/11/2003 |
| 6501603 | Microscope objective lens A microscope objective lens having a large aperture and yielding satisfactorily corrected, flat images. The microscope objective lens includes, in order from the object side, a first lens group G1 having an overall positive refractive power and a second l... | 12/31/2002 |
| 6498903 | Zoom finder device A driving gear is rotated in cooperation with zooming of a taking lens. The driving gear and a cam cylinder are attached to an axis that is supported by a finder frame. A projection of the driving gear is inserted into a cutout of the cam cylinder. Since ... | 12/24/2002 |
| 6493157 | Image-capturing lens An image-capturing lens is formed of front and rear lens groups having negative and positive refractive power, respectively, in order from the object side. The rear lens group is formed of, in relative sequential order from the most object side of the rea... | 12/10/2002 |
| 6483626 | Direct-view-type confocal point optical system A direct-view-type confocal point optical system having a design wherein noise in the return light from an object being viewed is suppressed by ensuring that light reflected from various optical component surfaces is reflected away from the image light re... | 11/19/2002 |
| 6466747 | Structure of manual operation button A decorative frame that may be made of metal is arranged at the periphery of a manual operation button, and the manual operation button with decorative frame are designed so that they may be fixedly attached to the exterior cover of a camera body within a... | 10/15/2002 |
| 6460654 | Collapsible ladder having highly nesting rungs with integral stand-off projections A collapsible ladder having rungs of a relatively strong and thin material with integral stand-off projections that allow the ladder to be safely descended and of a cross-section that allows the ladder rungs to nest to a high degree of compactness. The la... | 10/08/2002 |
| 6461060 | Camera A cassette chamber, a take-up chamber and a battery room are formed on a main body. A rear cover is attached to the main body. The rear cover is molded from plastics and integrated with an outer cover section and a frame section. In the frame section, a l... | 10/08/2002 |
| 6457829 | Projection device comprising a correction lens arranged between a prism optical system and at least one of three optical modulation elements A transparent member having refractive power as a result of curved surface thereon is used in one or more light paths of a three-color projection device in order to correct for the lateral color aberration of the projection lens. The transparent member is... | 10/01/2002 |
| 6456430 | Microscope A microscope is disclosed that includes: a light source that emits light in a wavelength range that includes both visible and infrared wavelengths, an illuminating optical system for illuminating a specimen with the light from the light source, an objecti... | 09/24/2002 |
| 6449100 | Teleconverter lens A teleconverter lens is disclosed, for attachment to the enlarging side of a projection lens, wherein aberrations generated by a negative focusing lens group positioned at the enlarging side of the projection lens are not made greater by the teleconverter... | 09/10/2002 |
| 6449104 | Gaussian lens A Gaussian lens having no more than six lens elements of refractive power is formed of, in order from the object side: a first lens element which is biconvex, a second lens element which is a positive meniscus lens with its convex surface on the object si... | 09/10/2002 |
| 6445511 | Inner-focus-type lens An inner-focus-type lens is formed of three lens groups of positive, negative and positive refractive power, respectively, in order from the object side. The first lens group is formed of four lens elements of positive, positive, negative and negative ref... | 09/03/2002 |
| 6433910 | Confocal optical system A confocal optical system includes a pinhole aperture for creating a point light source from light that is transmitted through an optical fiber, an optical scanning system for scanning the light that emerges from the pinhole aperture, and an optical focus... | 08/13/2002 |
| 6414798 | Eyepiece for picture display device An eyepiece, consisting of two lens groups, is lighter in weight and more compact than known previously, yet has aberrations that are favorably corrected despite the eyepiece having a large exit pupil diameter. This is accomplished by including a predeter... | 07/02/2002 |
| 6402325 | Illuminating optical system having multiple light sources and lenticular arrays for use with a projection-type display unit An optical illumination system for a projection-type display unit is disclosed wherein multiple light sources are oriented so as to cause the optical axes of their emitted light beams to be non-parallel to one another and to overlap at a first lenticular ... | 06/11/2002 |
| 6404564 | Projection lens A projection lens having a first lens group of negative refractive power and a second lens group of positive refractive power, in order from the enlarging side of the projection lens. A stop is positioned within a specified distance of the projection lens... | 06/11/2002 |
| 6396642 | Wide-angle zoom lens A wide-angle zoom lens is provided having only three lens groups of, in order from the object side, negative, positive, and positive refractive power, respectively. The fist lens group is formed of only two lens elements, each of negative refractive power... | 05/28/2002 |
| 6366412 | Lens system for reading images and image reader A lens system for reading images, consisting of six lens elements of positive, positive, negative, negative, positive and positive refractive power, respectively, in order from the object side, with a stop positioned between the third lens element and the... | 04/02/2002 |
| 6362924 | Real-image-type zoom finder A compact, real-image-type zoom finder having a high zoom ratio and high optical performance is provided. The finder is formed of an objective optical system and an erecting eyepiece. The objective optical system is formed of, in order from the object sid... | 03/26/2002 |
| 6357464 | Method for reducing dissipation rate of fluid ejected into boundary layer A method for ejecting a second fluid into the near-wall region of the boundary layer of a first fluid, so that the second fluid hugs the wall. This alone reduces drag by modifying the behavior of the near-wall structure, thereby reducing the frequency of ... | 03/19/2002 |
| 6357374 | Method and apparatus for increasing the effectiveness and efficiency of multiple boundary layer control techniques In an apparatus and method for ejecting an additive for significantly reducing the drag of a first fluid moving relative to a wall, a drag-reducing substance is conditioned by causing a second fluid, which includes the drag-reducing substance as a dispers... | 03/19/2002 |
| 6353509 | Wide-angle lens A wide-angle lens is disclosed having only three lens groups of negative, positive, and positive refractive power, in order from the object side, and having only six lens elements with refractive power. The first lens group is formed of a meniscus lens wi... | 03/05/2002 |
| 6353588 | Objective lens used with high density optical recording medium An objective lens having no more that two lens elements with refractive power is disclosed for reading or writing at high density on a recording medium. The first lens element, in order from a light source side, is biconvex and includes at least one asphe... | 03/05/2002 |
| 6349734 | Method for reducing dissipation rate of fluid ejected into boundary layer Skin friction reduction on a surface moving relative to a fluid can be obtained by ejecting a polymer--water mixture/solution into the boundary layer. The efficacy of the ejected polymer--water mixture/solution is closely related to polymer dissipation ou... | 02/26/2002 |
| 6351337 | Three-group zoom lens A three-group zoom lens of negative, positive, and positive refractive power, in order from the object side. The first lens group is formed of two lens elements of negative and positive refractive power, respectively, the second lens group includes an ape... | 02/26/2002 |
| 6351336 | Attachment lens for short distance shots An attachment lens for attachment to the object side of a main camera lens in order to enable the taking of short distance shots is disclosed. The attachment lens consists of three lens elements of positive, negative, and positive refractive power, in ord... | 02/26/2002 |
| 6337759 | Polarization converter and projection-type display device using the same A polarization converter, and a projection-type display device using the same, is disclosed having two or more comb polarization-separation prism arrays that are arranged, with regard to the alignment of alternating polarizing beam splitter films and refl... | 01/08/2002 |
| 6334510 | Collapsible ladder having highly nesting rungs with integral stand-off projections A collapsible ladder having rungs of a relatively strong and thin material with integral stand-off projections that allow the ladder to be safely descended and of a cross-section that allows the ladder rungs to nest to a high degree of compactness. The la... | 01/01/2002 |
