Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7436599 | Electronic image pickup system The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and perfo... | 10/14/2008 |
| 7414781 | Catoptric objectives and systems using catoptric objectives In general, in a first aspect, the invention features a system that includes a microlithography projection optical system. The microlithography projection optical system includes a plurality of elements arranged so that during operation the plurality of elements ima... | 08/19/2008 |
| 7385769 | Image forming optical system, and image pickup apparatus and identification apparatus using the system An image forming optical system comprising, in order from an object side: a negative lens unit having one or two negative lenses without including any positive lens; a reflecting member; an aperture stop; and a positive lens unit having one or two positive lenses wi... | 06/10/2008 |
| 7365910 | Electronic image pickup system The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and perfo... | 04/29/2008 |
| 7315423 | Zoom lens including four lens groups A zoom lens that is designed to enable a thinner image pickup device includes, in order from the object side, a first lens group having positive refractive power and a reflecting surface for folding the optical axis of the zoom lens approximately ninety degrees, a s... | 01/01/2008 |
| 7289279 | Lithographic objective having a first lens group including only lenses having a positive refractive power A projection objective includes a first lens group (G1) of positive refractive power, a second lens group (G2) of negative refractive power and at least one further lens group of positive refractive power in which a diaphragm is mounted. The first lens... | 10/30/2007 |
| 7242529 | Zoom lens and image pickup apparatus A zoom lens includes: a first lens group having a positive refractive power and statically positioned along an optical axis when a power of the zoom lens is varied or the zoom lens is focused; a second lens group having a negative refractive power; a third lens grou... | 07/10/2007 |
| 7177085 | Multiple imaging system and method for designing same An optical system of the present invention produces multiple simultaneous adjoining images on a single image plane. The optical system includes a first optical sub-system, a second optical sub-system, an aperture stop located between the first optical sub-system and... | 02/13/2007 |
| 7145637 | Illumination system having a more efficient collector optic An illumination system having a light source is disclosed, the light source having a source size and emitting radiant power in a spatial angle element Ω(α), α indicating the aperture angle, a collector, which collects radiant power from the source up to a first m... | 12/05/2006 |
| 7130131 | Zoom optical system A zoom optical system includes followings: a plurality of lens units for magnification, the plurality of lens unit for zooming including in order from a reduction conjugate side to a magnification conjugate side, a first lens unit having a positive optical power, a ... | 10/31/2006 |
| 7119966 | Projection lens system and projector A projection lens system that projects projection light from a light modulator onto a screen and which is telecentric on an input side is provided. The projection lens system comprises a first meniscus lens that is disposed closest to the screen, is convex on a scre... | 10/10/2006 |
| 7119965 | Head mounted projection display with a wide field of view A ultra-wide field of view head mounted display has been realized by integrating an ARC display component having a greater than about 70 degrees field of retro-reflection with an optical tiling display which provides a greater than about 80 degrees horizontal field ... | 10/10/2006 |
| 7080910 | Method and system for a thermal architecture and user adjustable keystone in a display device A method and system for a thermal architecture and user adjustable keystone in a display device is described. The system includes a screen, a lens to project images, and one or more mirrors to reflect the images projected by the lens to the screen. A mirror assembly... | 07/25/2006 |
| 7073542 | Liquid quantity determination unit, photolithography apparatus, and liquid quantity determination method The invention automates determination of the quantity of a index matching liquid. The invention is a liquid quantity determination unit to determine the quantity of a filling liquid to be filled between a plurality of optical components, and includes an inspe... | 07/11/2006 |
| 7023627 | Lithographic objective having a first lens group including only lenses having a positive refractive power A projection objective includes a first lens group (G1) of positive refractive power, a second lens group (G2) of negative refractive power and at least one further lens group of positive refractive power in which a diaphragm is mounted. The first lens... | 04/04/2006 |
| 7016114 | Diffraction optical device and optical system including same A diffraction optical device includes a first diffraction element and a second diffraction element arranged adjacent to each other. One of the first diffraction element and the second diffraction element has a positive power, and the other has a negative power. The ... | 03/21/2006 |
| 6989936 | Variable power optical system The optical system disclosed in this specification is a variable power optical system for enlarging and projecting a reduction side object onto an enlargement side image plane, or reducing and projecting an enlargement side object onto a reduction side image plane. ... | 01/24/2006 |
| 6961186 | Contact printing using a magnified mask image Improvements in the fabrication of integrated circuits are driven by the decrease of the size of the features printed on the wafers. Current lithography techniques limits have been extended through the use of phase-shifting masks, off-axis illumination, and proximit... | 11/01/2005 |
| 6903881 | Projection optical system and projection-type image display apparatus using it Small projection optical systems and projection-type image display apparatuses use a plurality of prisms with internally reflecting surfaces with optical power, an incident light refracting surface, and an exit light refracting surface in order to project an image o... | 06/07/2005 |
| 6876501 | Objective lens, coupling lens, light converging optical system, and optical pick-up apparatus An objective lens for recording and/or reproducing an optical information recording medium, comprises a first lens having a positive refractive power; and a second lens having a positive refractive power; wherein the first lens and the second lens are aligned in thi... | 04/05/2005 |
| 6850279 | Optical image recording system, and associated processing system An optical image recording system for electronic recording of optical information comprising a lens system and a body. The body has a configuration with a low height and with broad surfaces. Optical information is received through one of these surfaces. An image rec... | 02/01/2005 |
| 6717746 | Catadioptric reduction lens A catadioptric projection lens configured for imaging a pattern arranged in an object plane (2) onto an image plane (4) while creating a single, real, intermediate image (3) has a catadioptric first section (5) having a concave mirror ( | 04/06/2004 |
| 6636350 | Microlithographic reduction projection catadioptric objective A photolithographic reduction projection catadioptric objective includes a first optical group having an even number of at least four mirrors and having a positive overall magnifying power, and a second substantially refractive optical group more image fo... | 10/21/2003 |
| 6604436 | Ultra-accelerated natural sunlight exposure testing facilities A multi-faceted concentrator apparatus for providing ultra-accelerated natural sunlight exposure testing for sample materials under controlled weathering conditions comprising: facets that receive incident natural sunlight, transmits VIS/NIR and reflects ... | 08/12/2003 |
| 6577454 | Folded image intensifier objective lens An objective lens assembly for use in an image intensifier over the 0.6 to 0.9 micron spectral bandwidth resulting in a F# within a range of 1.0 to 1.5 and a field of view within the range of 35 to 45 degrees. The assembly includes an air-spaced doublet, ... | 06/10/2003 |
| 6549342 | Finder optical system A finder optical system for a single lens reflex camera is provided with a photographing optical system, a beam splitter for splitting light passed through the photographing optical system. First light deflected by the beam splitter forms a primary image ... | 04/15/2003 |
| 6522475 | Zoom lens A zoom optical system comprises a plurality of optical elements. The plurality of optical elements include a first optical element having two refracting surfaces and a plurality of reflecting surfaces formed in a transparent body, being arranged such that... | 02/18/2003 |
| 6522484 | Projection objective A projection objective, particularly for microlithography at 248 nm or 193 nm has, after two bulges and two waists, a pronounced lens arrangement that preferably contains a further waist and the system diaphragm (AS). This is markedly set back from the ne... | 02/18/2003 |
| 6441972 | Optical image separator An optical assembly divides a single image into a plurality of images which are simultaneously projected onto a single sensor array. The optical assembly is arranged so that each of the plurality of images can be made to pass through a filter of a differe... | 08/27/2002 |
| 6373640 | Optical systems for digital cameras Optical systems for use in digital cameras are provided. The systems can be switched between three optical paths (1,2,3): a first path (1) for through-the-lens (TTL) viewing; a second path (2) for recalling previously taken pictures from a microdisplay (1... | 04/16/2002 |
| 6301062 | Lens optical system A lens optical system is provided with a cemented lens element formed by cementing two constituent lens elements made of different optical materials together, with a diffractive optical surface formed at the cementing interface between the two constituent... | 10/09/2001 |
| 6212334 | Supplementary optical system for a camera A supplementary optical system for a camera which is inserted between a photographic lens and a camera housing and which comprises a relay system for projecting an image of the photographic lens onto a film or a video recording material, wherein the relay... | 04/03/2001 |
| 6181486 | Optical architecture for infrared viewing system An optical architecture for an infrared vision system for binoculars or a camera. This system includes a front afocal, a scanner, an optical device forming an image of the scene and a cooled detector with cold stop. This architecture has an aperture stop ... | 01/30/2001 |
| 5999334 | Fixed focal length lens system A lens system has the first and second lens components from the object side. The first lens component has a negative optical power. The second lens component has a positive optical power. The lens system fulfills the conditions: 0.0 | 12/07/1999 |
| 5739956 | Real image albada finder There is provided an objective lens for focusing a subject light to form a real image on a predetermined focal plane, an eyepiece through which the real image is observed, and the first and second prism assemblies between the objective lens and the eyepie... | 04/14/1998 |
| 5727236 | Wide angle, deep field, close focusing optical system An optical system having the features of a wide angle lens, a deep field lens and a close focusing lens is comprised of an objective lens, a field lens and a relay lens aligned on an optical axis in that sequence for the objective lens to form an intermed... | 03/10/1998 |
| 5689377 | Catadioptric optical system and exposure apparatus having the same A catadioptric optical system includes a first imaging optical system forming an intermediate image of a pattern provided on a first surface with a reduced magnification, including a first lens group with a positive refracting power and a second lens grou... | 11/18/1997 |
| 5680257 | Light collection optics for spatial light modulator Various light collection systems (10, 20, 30), for providing light to be reflected from, or transmitted by, an SLM. Two systems (10, 20) include reflectors (11, 21), which are designed to collect rear-emitted light from a source, as well as lenses (12, 22... | 10/21/1997 |
| 5673135 | Scanning projection optical device A scanning projection optical device is disclosed which can be constructed using relatively small optical members, which employs a catadioptric system that is advantageous to attain a high NA, and which has arc-shaped object and image regions located out ... | 09/30/1997 |
| 5506614 | Selective optical elements for multiwavelength electronic print heads The present invention is a thin film coating that may be applied to various optical elements and a method for controlling the size of the imaging spot from multiwavelength sources in an optical path. A selective optical element made in accordance with the... | 04/09/1996 |
