Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8189274 | Imaging optical system There is provided an imaging optical system installed in a mobile communications terminal and a personal digital assistant (PDA) or utilized in a surveillance camera and a digital camera. The imaging optical system including, sequentially from an object side in fron... | 05/29/2012 |
| 8125719 | Lens unit and image capturing device A lens unit includes a first lens having positive power, a second lens having positive power, an aperture stop, a third lens having negative power, and a fourth lens. The first lens, the second lens, the aperture stop, the third lens, and the fourth lens are arrange... | 02/28/2012 |
| 7982976 | Imaging lens and imaging apparatus An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens group having a positive power as a whole; a second lens group including a lens in the most object side thereof, the lens having a concave surface on the object s... | 07/19/2011 |
| 7952818 | Optical imaging lens assembly The present invention provides an optical imaging lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element having a concave object-side sur... | 05/31/2011 |
| 7817356 | Imaging lens, and imaging apparatus and mobile terminal apparatus using the same An imaging lens comprises a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4), which are arranged in ascending sequence, starting from the lens nearest to the object. The first lens (L1) has a double-co... | 10/19/2010 |
| 7791825 | Macro objective A description is given of a macro objective (M) with a corrective compensation of aberrations (Continuous Aberration Suppression; CAS). The macro objective has a first positive optical subassembly (A), a second nearly afocal optical subassembly (B), a stop (APE), a ... | 09/07/2010 |
| 7787196 | Imaging lens and imaging apparatus An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens group having a positive power as a whole; a second lens group, in which an object-side surface of a lens closest to the object side is concave toward the object ... | 08/31/2010 |
| 7715119 | Imaging lens An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a ... | 05/11/2010 |
| 7710666 | Imaging lens module An imaging lens module includes a fixed aperture stop and an optical module, and the optical module includes a first, a second, a third and a fourth lenses. The first lens has a meniscus lens with positive refractive power and a concave surface disposed towards the ... | 05/04/2010 |
| 7646552 | Subminiature imaging optical system There is provided a subminiature imaging optical system suitably applicable to a subminiature optical device such as a mobile phone camera. The subminiature imaging optical system including: a first lens having positive refractive power and both convex surfaces; a s... | 01/12/2010 |
| 7535658 | Imaging lens An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a ... | 05/19/2009 |
| 7443611 | Imaging lens An imaging lens is provided and includes: a first lens of a positive lens; a second lens of a negative lens whose concave surface faces to an image side of the second lens; a third lens of a positive lens, whose both surfaces are aspheric, having a concave surface f... | 10/28/2008 |
| 7440198 | Focus adjustable optical system A focus adjustable optical system includes a first lens unit and a second lens unit arranged on an optical axis in direction from the object side to the image side. The two opposite surfaces of each of the lenses of the first lens unit and second lens unit are non-s... | 10/21/2008 |
| 7426083 | Imaging optical system and image capturing apparatus including imaging optical system At least one exemplary embodiment is directed to an imaging optical system which includes a first lens unit having a positive refractive power and a second lens unit having a negative refractive power. The first lens unit includes a first lens sub-unit including a s... | 09/16/2008 |
| 7417802 | Zoom lens and image pickup apparatus equipped with same A zoom lens comprises, in the following order from the object side to the image side, a positive first lens unit, a negative second lens unit, which moves during zooming, a positive third lens unit, and a positive fourth lens unit, which moves during zooming. The fi... | 08/26/2008 |
| 7408719 | Telephoto lens, telephoto lens system, and imaging system incorporating the same The invention relates to a telephoto lens that can easily have high resolving power best suited for use with digital cameras and maintain the integrity of performance even at the nearest distance and a telephoto lens system that incorporates the same and is best sui... | 08/05/2008 |
| 7369332 | Closing module for an optical arrangement Closing module for an optical arrangement, in particular for an objective for microlithography, comprising an optically active closing element (3) having a first axis (3.1) and a holding device (2) that fixes the closing element (3) at le... | 05/06/2008 |
| 7345830 | Imaging lens An imaging lens is provided and includes, in order from an object side of the imaging lens: a first lens of a positive lens; a second lens of a negative lens; a third lens of a bi-aspheric lens that has an image-side surface having an extreme point at a position oth... | 03/18/2008 |
| 7342731 | Wafer scale lens and optical system having the same Provided are wafer scale lenses having a diffraction surface as well as a refractive surface, and an optical system having the same. The wafer scale lens includes a lens substrate, a first lens element formed on the object side of the lens substrate, having a positi... | 03/11/2008 |
| 7321474 | Photographic lens A small size photographic lens for the photographic unit of a device such as a camera or a camera phone. The photographic lens includes: a first lens having positive refractive power; a second lens having negative refractive power and a convex surface facing the obj... | 01/22/2008 |
| 7317584 | Zoom lens A zoom lens for imaging an image onto a photosensitive element includes a first lens group, a second lens group, a third lens group and a fourth lens group. The second lens group is located and suitable for moving between the first lens group and the third lens grou... | 01/08/2008 |
| 7295386 | Imaging lens An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a ... | 11/13/2007 |
| 7295378 | Zoom optical system A zoom optical system, in order from a reduction side to a magnification side, includes a first lens unit having positive optical power, a second lens unit having the positive optical power, a third lens unit having negative optical power, and a fourth lens unit hav... | 11/13/2007 |
| 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 |
| 7289278 | Subminiature optical system A subminiature imaging optical system suitable for a subminiature optical device such as a mobile phone camera. An aperture stop is provided. A first lens has a positive refractive power and is convex at an object side. A second lens has a negative refractive power.... | 10/30/2007 |
| 7289280 | Zoom lens and imaging system At least one exemplary embodiment is directed to a zoom lens which includes, in order from an object side to an image side, a first lens unit having positive refractive power and is stationary during zooming, a second lens unit configured to move to perform zooming,... | 10/30/2007 |
| 7286304 | Variable focal length lens system and imaging apparatus A variable focal length lens system includes: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; and a fourth lens group having a positive refractive p... | 10/23/2007 |
| 7274518 | Optical system for taking image An optical system comprises from the object side: a positive first lens element, a negative second lens element, a positive third lens element, a fourth lens element, and an aperture stop located between the object side of the optical system and the second lens elem... | 09/25/2007 |
| 7253972 | Telephoto lens system A telephoto lens system of a four-lens-group arrangement includes a negative first lens group, a positive or negative second lens group, a negative third lens group and a positive fourth lens group. The telephoto lens system of the four-lens-group arrangement is con... | 08/07/2007 |
| 7215492 | Image pickup lens, image pickup apparatus, and mobile terminal provided with image pickup apparatus An image pickup lens for forming a subject image on an photoelectric converter of a solid-sate image pickup element, includes: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a ... | 05/08/2007 |
| 7212355 | Image pick-up lens system An image pick-up lens system includes an aperture stop (10), a biconvex first lens (20), and a meniscus-shaped second lens (30) having a concave surface on a side of an object. The aperture stop, the first lens and the second lens are aligned in... | 05/01/2007 |
| 7180685 | Image pick-up lens system An image pick-up lens system includes an aperture stop (10), a biconvex first lens (20), and a meniscus-shaped second lens (30) having a concave surface on a side of an object. The aperture stop, the first lens and the second lens are aligned in... | 02/20/2007 |
| 7133084 | Lens systems for projection televisions Projection lens systems for use with cathode ray tube (CRT) projection televisions are provided which have positive first lens units (U1) and negative second lens units (U2) where the negative second lens units are customized in terms of at least one o... | 11/07/2006 |
| 7079330 | Lens having aspheric surfaces A lens that can be used in a digital camera includes in sequence a first lens element (20), a second lens element (30), a third lens element (40), and a fourth lens element (50). The first lens element is biconvex, and includes a first as... | 07/18/2006 |
| 7068429 | Zoom optical system with a vibration correction function and imaging device using the zoom optical system A zoom optical system with a vibration correction function includes, from the object side, a first lens group having positive refractive power and that is stationary during zooming, a second lens group having negative refractive power and that moves along the optica... | 06/27/2006 |
| 7064905 | Imaging lens The present invention includes, from an object side to an image-plane side: an aperture stop with a predetermined diameter, a first lens with a positive refractive power having a convex surface on the object side, a second lens with a positive refractive power havin... | 06/20/2006 |
| 7038861 | Image pick-up lens A low-cost bright image-pick up lens of a small size is provided which is short in total length, wherein the angle of field is beyond 30°; the angle of incidence onto the image pickup device is narrowed; and various aberrations are appropriately corrected. The imag... | 05/02/2006 |
| 7031079 | Taking lens system A three-lens-element taking lens system for forming an image on a solid-state image sensor has, from the object side, a first lens element having a positive optical power, an aperture stop, a second lens element having a positive optical power, and a third lens elem... | 04/18/2006 |
| 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 |
| 7019793 | Lens systems for projection televisions Projection lens systems for use with cathode ray tube (CRT) projection televisions are provided which have positive first lens units (U1) and negative second lens units (U2) where the negative second lens units are customized in terms of at least one o... | 03/28/2006 |
