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System for magnetically attaching templeless eyewear to a person
A system of eyewear that eliminates the need for hinges on the frames of the eyewear.
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| Number | Title | Issue Date |
| 7411745 | Large-aperture-ratio internal focusing telephoto lens The purpose is to provide a large-aperture-ratio internal focusing telephoto lens applicable to a wider photographing area by equipping a vibration reduction function capable to satisfactorily correct a camera shake and the like with securing superb optical performa... | 08/12/2008 |
| 7224541 | Zoom lens A zoom lens formed in a small size adaptable to a thin and portable device, having three lens groups, including, from the object plane to the image forming plane: a first lens group with a negative power, a second lens group with a positive power and a third lens gr... | 05/29/2007 |
| 7180682 | Variable-magnification optical system and image taking apparatus A variable-magnification optical system has a plurality of lens groups that image a light beam from the object side on an image sensor, an optical aperture stop that intercepts part of the light beam heading for the image sensor, and a reflective mirror that changes... | 02/20/2007 |
| 6912095 | Projection lens system A compact and light-weighted projection lens system that is capable of projecting an image at an angle as wide as 75 degrees with sufficient field angle and brightness as represented by F number of approximately 2.4, that is capable of effectively correcting chroic ... | 06/28/2005 |
| 6809878 | Zoom lens The present invention provides a compact, thin zoom lens. The zoom lens according to the present invention includes, from an object side to an image plane side, a first lens group having an overall negative overall refractive power, a second lens group having an ove... | 10/26/2004 |
| 6388817 | F-theta lens An fθ lens comprises, successively from the luminous flux entrance side, a first lens made of a negative lens having a flat surface on one side, a positive second lens having a surface with a stronger curvature directed onto the image side, and a third l... | 05/14/2002 |
| 6166861 | Wide-angle eyepiece lens A wide-angle eyepiece lens having an angle of view greater than 60° comprises, in order from the object end, a first lens group including a positive power meniscus lens element with a concave object side surface, an overall negative power second lens gro... | 12/26/2000 |
| 5850311 | Eyepiece system An eyepiece system which is configured for observing an image formed by an objective lens system and comprises, in order from a side, of the objective lens system, a first lens element having at least one aspherical surface and a concave surface on the si... | 12/15/1998 |
| 5835286 | Standard lens system having a large aperture ratio A standard lens system composed, in order from the object side, of a first lens unit having a positive refractive power, an aperture stop, a second lens unit having a positive refractive power and a third lens unit having a negative refractive power: the ... | 11/10/1998 |
| 5768030 | Compact small format lens system A lens system particularly suitable for use in a camera using small format film has two lens units, a front negative power lens unit and a rear positive power lens unit. The rear lens unit has no negative lens elements and includes an aspheric surface and... | 06/16/1998 |
| 5724190 | Objective lens for endoscope An objective lens for an endoscope includes a first lens group having one negative lens, a second lens group having at least one positive lens, and a third lens group including a positive lens. The objective lens satisfies the following relationship: θ | 03/03/1998 |
| 5708531 | Objective lens system This invention relates to a microscope objective lens system a part of which is immersed in a liquid to observe a sample present in the liquid. Particularly, this invention provides an apochromat-grade microscope objective lens system which can be machine... | 01/13/1998 |
| 5568325 | Achromatic lens system An achromatic lens system includes in order, from the object side, a front lens group, a chromatic aberration correcting lens group, and a rear lens group. Aberrations, including spherical aberration, coma, astigmatism, curvature of image, as well as axia... | 10/22/1996 |
| 5526191 | Fourier transform lens assembly A Fourier transform lens assembly suited for use in an optical information processor includes a first lens group having a positive power, a second lens group having a negative power disposed on one side of the first lens group, and a third lens group havi... | 06/11/1996 |
| 5465178 | Focusing optical system for semiconductor lasers The invention is directed to a focusing optical system for semiconductor lasers, which is regulated in terms of magnification power in both its directions normal to the optical axis, so that the back focus of sufficient magnitude can be made equal in both... | 11/07/1995 |
| 5305147 | Eyepiece lens system for endoscopes An eyepiece lens system for endoscopes comprising a plurality of lens components and using at least one aspherical surface. This eyepiece lens system is composed of a small number of lens elements and has favorably corrected aberrations.... | 04/19/1994 |
| 5257134 | Zoom lens A zoom lens for the projector includes, in order from a screen, a first lens unit of positive refractive power, a second lens unit of negative refractive power and a third lens unit of positive refractive power, zooming from the wide-angle end to the tele... | 10/26/1993 |
