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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8000036 | Imaging lens system An imaging lens system in order from the object side to the image side includes a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fi... | 08/16/2011 |
| 7407334 | Lens for photographing system and camera assembly utilizing the lens In a lens group which is disposed forward of a photographing device and which includes at least a ceramic lens that is combined with a glass lens, wherein a conjugate surface of the photographing device by a combined surface between the ceramic lens and the glass le... | 08/05/2008 |
| 7312935 | Optical system and optical apparatus having the same At least one exemplary embodiment is directed to an optical system which includes a plurality of refractive optical elements arranged substantially symmetrically with respect to an aperture-stop. Furthermore the optical system comprises a refractive optical element ... | 12/25/2007 |
| 7298561 | Optical device A front group is formed of a negative first lens as a meniscus lens which is convex at the object side and a negative second lens, and a rear group is formed of a biconvex positive third lens, an aperture stop, a negative fourth lens and a biconvex positive fifth le... | 11/20/2007 |
| 7180644 | Holographic storage lenses Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a two-component design. The lenses can be used to both record to photorefractive storage media and to read from photorefractive storage media. ... | 02/20/2007 |
| 7154677 | Projection objective for microlithography The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of and/or behind the first narrowing. ... | 12/26/2006 |
| 7127179 | Polarization encoder device A optical polarization encoding device (16) provides wavelength dependent processing of polychromatic optical signals without prior separation into narrow wavelength bands. Embodiments of the encoding device include a wavelength dependent tunable optical swit... | 10/24/2006 |
| 7110192 | System and method for a composite lens for a flow cytometer A lens system for collecting and focusing light emanating from an object has a cuvette housing the object and having a wall of thickness not greater than 1.5 millimeters; a plano-convex lens having a planar surface affixed to the wall; a sequence of at least three m... | 09/19/2006 |
| 7064902 | Zoom lens, camera, and mobile information terminal A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side.... | 06/20/2006 |
| 7054076 | Lens assembly and optical imaging system using same A lens assembly is constructed to accommodate certain, often competing, design characteristics. The lens assembly provides high optical performance in a compact and easy to manufacture system. The lens assembly allows a manufacturer to produce a system that is commo... | 05/30/2006 |
| 7031074 | Zoom lens, camera, and mobile information terminal A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side.... | 04/18/2006 |
| 6924942 | Holographic storage lenses Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a single-component design. The lenses can be used to both record to photorefractive storage media and to read from photorefractive storage media. ... | 08/02/2005 |
| 6924938 | Zoom lens, camera, and mobile information terminal A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side.... | 08/02/2005 |
| 6909559 | Lens for reading an original, method and apparatus for reading an original, and image forming apparatus A lens for reading an original, comprises five lenses as a whole including two positive and two negative lenses, an aspherical surface provided on at least one surface of the five lenses, a construction of four lens groups for five lenses which include a cemented le... | 06/21/2005 |
| 6865032 | Real image type finder optical system, and imaging system comprising the same A real image type finder optical system includes an objective lens group having positive refracting power and an eyepiece lens group having a positive refracting power. The objective lens group includes a first group consisting of a negative lens, a second group con... | 03/08/2005 |
| 6801364 | Projection objective for microlithography The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of and/or behind the first narrowing. ... | 10/05/2004 |
| 6788387 | 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... | 09/07/2004 |
| 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 |
| 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 |
| 6445512 | Projection television lens systems having improved modulation transfer functions Six-component projection lens systems (13) for use in CRT projection televisions (10) are provided. To provide an improved overall modulation transfer function across the field of view of the lens, the system's first lens element (L1) has an object side s... | 09/03/2002 |
| 6437926 | Image capture lens and image capture apparatus An image capture lens and an image capture apparatus in which various kinds of aberrations are corrected and optical performance suitable for capturing images is obtained. Successively from an object side provided are a first lens group including a negati... | 08/20/2002 |
| 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 |
| 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 |
| 6181488 | Photographic lens A photographic lens comprising: a front lens group and a rear lens group that are arranged in order from the object side; wherein the front lens group comprises, in order from the object side, a first lens element which is a positive meniscus lens having ... | 01/30/2001 |
| 6115194 | Projection lens By satisfying certain specified conditions, a projection lens having six lens groups and a low F-number of 1.4 is disclosed wherein a maximum angle between a principal ray and the optical axis on the reducing side of the projection lens is 2.5° or less. ... | 09/05/2000 |
| 6028720 | High resolution objective for large-format photography A high-resolution objective for large-format photography has a pair of positive meniscuses flanking a stop area forming a lens aperture; and a respective negative cemented doublet on a side of each meniscus turned away from the stop area, the positive men... | 02/22/2000 |
| 5903400 | Projection-optical system for use in a projection-exposure apparatus Projection-optical systems are disclosed for projecting an image of a first object M onto a second object P. Each such projection-optical system comprises, in order from the first-object side: a positive first lens group; a negative second lens group comp... | 05/11/1999 |
| 5808804 | Projection television lens system Six-component projection lens systems for use in projection televisions are provided. From the screen side, the systems preferably have a + - +++ - configuration. The use of a second lens element having a negative power results in improved sagittal modula... | 09/15/1998 |
| 5796529 | Fast photographic lens system A fast photographic lens system comprises a first lens having a positive refractive power, a convex-shaped outer face and a flat inner face; a second lens having a positive refractive power, a convex-shaped outer face and a concave-shaped inner face; a th... | 08/18/1998 |
| 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 |
| 5708532 | Double-sided telecentric measurement objective A double sided telecentic measurement objective for contactless length measurement in two-dimensional and three-dimensional space. The objective has an image-side optical system consisting of three elements equivalent to those of an object-side optical sy... | 01/13/1998 |
| 5548447 | Photographic lens system A photographic lens system comprises, in order from the object end, a positive power element having a concave image end surface, an element having a concave image end surface, a negative power element, a positive power element, a meniscus element of a pos... | 08/20/1996 |
| 5539580 | Projection optical system for a liquid crystal projector A projection optical system for a liquid crystal projector having a plurality of lenses and projecting an image from liquid crystal display devices onto a screen including a front lens portion having a meniscus lens, a first concave lens, a convex lens an... | 07/23/1996 |
| 5513042 | Lens system with master lens system and conversion lens A lens system includes a master lens system and a conversion lens system. The master lens system has a first lens, a second lens, a third lens, and a fourth lens, which are sequentially arranged from an object side of the lens system to an image side ther... | 04/30/1996 |
| 5500767 | Objective lens and method of measuring its performance An objective lens is corrected for spherical aberration at both an operating wavelength and a measurement wavelength, such that the amount of spherical aberration to develop at the operating wavelength is substantially equal to the amount of spherical abe... | 03/19/1996 |
| 5311364 | Reading lens for scanner A reading lens for a scanner to read an original in a reduced magnification, the lens comprising six lenses, i.e., from a first lens to a sixth lens in order on an optical axis. The first lens is a positive lens having a first lens-surface and a second le... | 05/10/1994 |
| 5299065 | Objective with large aperture ratio An objective lens comprising, respectively from the object: a first element of a positive lens, at the object end thereof, having a convex surface; a second element of a positive meniscus lens, at the object end thereof, having a convex surface; a third e... | 03/29/1994 |
| 5293270 | Reading lens system An improved Gauss-type reading lens system having high lens performance in which there is only a small difference in performance in the meridional and sagittal directions and which can efficiently correct aberrations at various operating wavelengths to pr... | 03/08/1994 |
| 5191473 | Objectives An objective of some 10 magnifications usable with microscopes, etc. which has an increased numerical aperture and working distance, including a first lens component that is a cemented lens consisting of negative and positive lens elements, a second lens ... | 03/02/1993 |
| 5134523 | Zoom beam expander An achromatic zoom beam expander of the Galilean type. The disclosed zoom beam expander has three components, each having a doublet that is individually color corrected such that the zoom beam expander may be used with a laser such as an argon ion laser w... | 07/28/1992 |
