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 |
| 7715115 | Lens device A lens device comprises: an image-formation optical system that converges an incident luminous flux at an imaging element, to form an image; a diaphragm mechanism provided in the image-formation optical system; and a filter section that is provided on a subject side... | 05/11/2010 |
| 7692876 | Optical module An optical module in which the light outputted from the light source is condensed before outputted, and yet capable of reducing the development of contaminants on the light condensing area. The optical module includes: a light source for outputting light in the shor... | 04/06/2010 |
| 7400458 | Imaging optics with wavelength dependent aperture stop An imaging system includes a wavelength dependent aperture stop, which transmits light with different ranges of wavelengths through apertures of different diameters. Thus, different colored light will have different F-stops, which can be selected based on the power ... | 07/15/2008 |
| 7324169 | Projection optical system, projection television, and method of manufacturing lens included in projection optical system Provided are a projection optical system, a projection television, and a method of manufacturing a lens included in the projection optical system. The projection optical system includes lenses for projecting color beams onto a screen. A color filter layer, absorbing... | 01/29/2008 |
| 7321473 | Aperture and projection lens system An aperture comprising a round filter portion and at least one annular filter portion is provided. The round filter portion and the annular filter portion are forming a round zone. A transmission wavelength range of the round filter portion is larger than a transmis... | 01/22/2008 |
| RE39911 | Wide field of view projection lenses for compact projection lens systems employing pixelized panels A projection lens for use with LCD panels is provided. The lens has a first lens unit which includes a strong negative lens element having an aspherical surface which provides distortion correction, and a second lens unit which includes a first lens subunit separate... | 11/06/2007 |
| 7265915 | Detection device for a confocal microscope A detection device for an optical configuration, in particular for a confocal microscope, with a detector, a pinhole aperture 2 arranged before the detector in a beam path 1 of the detection light, and a lens 3 for focusing the detection light o... | 09/04/2007 |
| 7234815 | Optical viewing device having an apparatus for partial reduction of the illumination intensity The invention concerns an optical viewing device which incorporates a spectral filter to partially reduce the intensity or wavelength(s) of light transmitted to a specific region of a specimen which may be a human eye. The reduction in light intensity or wavelength ... | 06/26/2007 |
| 7215486 | Zoom lens and electronic imaging device having the same A zoom lens includes a most object-side lens unit remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side lens unit remaining fixed when the focusing operation is performed; and ... | 05/08/2007 |
| 7180673 | Mechanically-adjustable optical phase filters for modifying depth of field, aberration-tolerance, anti-aliasing in optical systems An optical system with mechanical adjustment provides for the rotation and/or translation of one or more optical phase filters to variably select an extended depth of field, aberration-tolerance, and/or anti-aliasing properties of an optical imaging system. By adjus... | 02/20/2007 |
| 7173776 | Fisheye lens system A fisheye lens system with a half angle-of-view of 90° includes a negative front lens group, a diaphragm, and a positive rear lens group. The negative front lens group includes at least three negative meniscus lens elements each of which has the convex surfa... | 02/06/2007 |
| 7127172 | Optical frequency filter The present invention relates to an optical signal shaping device such as an optical filter having a profile such that transmission of light through the device varies as a function of frequency over a selected bandwidth. The optical signal shaping device of the pres... | 10/24/2006 |
| 7085075 | Projection objectives including a plurality of mirrors with lenses ahead of mirror M3 According to one exemplary embodiment, a projection objective is provided and includes at least two non-planar (curved) mirrors, wherein an axial distance between a next to last non-planar mirror and a last non-planar mirror, as defined along a light path, is greate... | 08/01/2006 |
| 7085070 | Zoom lens and electronic imaging device having the same A zoom lens includes a most object-side lens unit remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side lens unit remaining fixed when the focusing operation is performed; and ... | 08/01/2006 |
| 7068436 | Projection lens for a microlithographic projection exposure apparatus A projection lens (10) for a microlithographic projection exposure apparatus has a first optical element, for example a birefringent lens (L2), that has polarization dependent properties causing intensity fluctuations in an image plane of the projectio... | 06/27/2006 |
| 7061603 | Method for inspecting exposure apparatus Light emitted from an illumination optical system is guided to a photomask where a pattern is formed of an optical member including a light transmission pattern as a diffraction grating pattern, in which a light transmission part and a opaque part are repeated in a ... | 06/13/2006 |
| 7052146 | Replaceable color wheel A projector, comprising a user replaceable color wheel. ... | 05/30/2006 |
| 7042657 | Filter for selectively processing optical and other signals A multi-section filter is provided for use in processing optical signals and other signals that can be readily projected from one filter section to another. Filters of the invention can be configured in numerous forms, including IIR and FIR filters and both linear a... | 05/09/2006 |
| 7042658 | Lens forchromatic aberration compensation A lens for chromatic aberration compensation is provided. The lens includes a lens body and a plurality of color filter films. The lens body has a light incident plane, a light exit plane and an optical axis. The light incident plane and/or the light exit plane comp... | 05/09/2006 |
| 7031084 | Imaging system using combined dichroic/high-pass filters An imaging system including: a lens; a dichroic filter positioned in front of the lens; and a high pass filter positioned between the lens and the dichroic filter. An appropriate design coordinating the components of such an imaging system diminishes imaging artifac... | 04/18/2006 |
| 6980377 | Chromatic vignetting in lens systems Methods and apparatus are provided for chromatic vignetting in lens systems. The apparatus includes a projection lens unit having an aperture stop, and a selective filter positioned at the aperture stop. The aperture stop defines a ray bundle boundary of an image pa... | 12/27/2005 |
| 6970201 | Method and lens system for modifying the modulation transfer function of light for a camera A method and lens system for modifying the modulation transfer function of the light passing through the lens system to a camera or other imaging system that includes providing a spatial frequency response modifying (SFRM) filter within the lens system. The SFRM fil... | 11/29/2005 |
| 6963450 | Fresnel lens and die for the same Provided is a Fresnel lens the manufacture of that is unlikely to be affected by the working errors of the die in the optical axis and its neighborhood. Two lens surfaces 11, 11 that are disposed in the vicinity of the optical axis are disposed in the way the... | 11/08/2005 |
| 6947225 | Fresnel lens sheet, process of producing Fresnel lens sheet, mold for use in the production process, and rear projection screen comprising the Fresnel lens sheet The present invention provides a Fresnel lens sheet that can, in production using a mold, be easily released from the mold and that scarcely produces stray light upon use, and others. Each prism 2 on the incident side of a Fresnel lens sheet 1 is forme... | 09/20/2005 |
| 6943943 | Illuminating apparatus for a microscope An illuminating apparatus for a microscope comprises a condenser lens for condensing beams of illumination light from a light source and a pin-hole stop. The pin-hole stop has a pin-hole, provided on an optical axis, for transmitting only strong light beams from a c... | 09/13/2005 |
| 6940593 | Wedged optical filter stack An optical reflection device for filtering and spatially positioning individual optical channels or wavelengths. The device includes a plurality of optical members with reflective surfaces and at least one reflective layer located on the reflective surface of each o... | 09/06/2005 |
| 6940660 | Optical device An optical device has a plurality of optical elements lined up in a row laterally. The optical elements in each case have a light entry surface, a light exit surface, and an associated optical axis. The light entry surfaces are in each case formed convexly in the ma... | 09/06/2005 |
| 6856466 | Multiple imaging system A series of optical elements is used to produce multiple simultaneous adjoining images on a single image plane. A first, intermediate, image is produced using the first telecentric imaging lens. This intermediate image is produced at a plane coincident with an adjus... | 02/15/2005 |
| 6813097 | Lenses capable of post-fabrication modulus change Novel optical elements are provided which are capable of post fabrication modifications. Specifically, the invention includes lenses, such as intraocular lens, which can undergo changes in storage modulus after fabrication. ... | 11/02/2004 |
| 6754009 | Zoom lens and image taking apparatus having the same This specification discloses a zoom lens of novel construction in which ghost or flare caused by the reflection between a filter member and an image pickup surface suppressed. This zoom lens is provided, in succession from the front to the rear, with a first lens un... | 06/22/2004 |
| 6611642 | Optical coupling arrangement An optical coupler and method of making an optical filter is disclosed wherein a compound lens having two separate movable lenses are disposed between input/output ports and a filter element, such as a dichroic filter element. The filter is tuned during a... | 08/26/2003 |
| 6525881 | Optical filters derived from spherical lenses and method of fabrication thereof An optical filtering element with minimized edge effects, larger clear center aperture, and thermally stable bonding area. The element consists of a modified ball lens. The glass material that comprises the ball lens can be selected from a variety of ther... | 02/25/2003 |
| 6389238 | Lens barrel A lens barrel includes an outer barrel including a lens-hood mount portion at the front end of the outer barrel, a lens hood being detachably attached to the lens-hood mount portion; an inner barrel including a filter mount portion at the front end of the... | 05/14/2002 |
| 6356576 | Deep ultraviolet catadioptric anamorphic telescope A catadioptric anamorphic beam expanding telescope expands an optical beam in a first axis substantially perpendicular to the beam propagation axis, and deflects it in a plane substantially perpendicular to the first axis. The beam expanding telescope can... | 03/12/2002 |
| 6252724 | Method for producing a fresnel lens on a catadioptric basis, and a fresnel lens produced using this method The invention relates to a method for producing a Fresnel lens having a staged entrance surface, reflecting surfaces and an exit surface. The entrance surface is subdivided into outer concentric stages and a central part. The central part is aspherically ... | 06/26/2001 |
| 5954633 | Endoscope optical system An endoscope optical system is used in an endoscope which can be combined with at least two laser treatment units that produce different wavelengths. At least two filters for removing laser light are provided in the path of the optical system, and are arr... | 09/21/1999 |
| 5774278 | Spectral filter A spectral filtration system comprising a non-imaging optic having entry and exit faces, the exit face being tilted relative to the entry face, and a filter positioned so as to receive light from, or transmit light to, a face of the non-imaging optic.... | 06/30/1998 |
| 5763054 | Anti-reflection treatment for optical elements An anti-reflection coating for optical elements and a method for forming an anti-reflection coating on an optical element includes one or more layers of a woven plastic mesh material that may be layered on the surface of an optical element such as the len... | 06/09/1998 |
| 5760974 | Lens system for maximizing light collection efficiency and transmission An optical lens system includes a multi-element lens designed to maximize light collection efficiency and transmission but accepting a sufficiently high level of distortion to forego the system from imaging light patterns at each of a set of wavelengths a... | 06/02/1998 |
| 5687930 | System and components useful in landing airborne craft An improved system is provided suitable for use in landing an aircraft (for example, helicopter, RPV, VTOL) on shipboard comprising a support, base, platform or housing, reciprocal from remote a landing area on the deck of a ship to a position proximate t... | 11/18/1997 |
