Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 4349250 | Process and apparatus for the dynamic or static perimetry of the human eye A process and apparatus for dynamic or static perimetry of the human eye wherein topographical measuring threshold values of eye sensitivity for the eye being tested are obtained and are electronically compared with stored standard values of eye sensitivi... | 09/14/1982 |
| 4303313 | Photographic lens system A photographic lens system is constituted of four lens components and four lens elements, comprising a first lens component of a meniscus positive lens with its convex surface on the object side, a second lens component of a biconcave lens, a third lens c... | 12/01/1981 |
| 4283124 | Eye fundus camera An eye fundus camera illuminates the eye to be inspected with a light that does not cause dilation or contraction of the eye pupil. In the camera, a photographic system forms an image of the eye fundus on a recording body. A projection system projects an ... | 08/11/1981 |
| 4274714 | Rear viewer for automobile A rear viewer for automobile is disclosed having means for mounting an optical system on an automobile rear window glass, which means consists of a box member made of synthetic resin or light metal and holds the optical system made of synthetic resin and ... | 06/23/1981 |
| 4274711 | Bright photographic lens system with rear stop diaphragm A photographic lens system such as a telescopic lens system adapted for use with a rear stop diaphragm in which the backfocus is about 0.3F, the F number is about F/2.8, the system is small in size and aberrations are well compensated for. Front and rear ... | 06/23/1981 |
| 4273415 | Optical objective An optical objective, usable for reproduction as well as for photographic and cinematographic purposes, consists of five components--two on the object side and three on the image side of a diaphragm space--constituted by a total of seven meniscus-shaped l... | 06/16/1981 |
| 4270842 | Optical system for forming an image of the retina An optical system for forming an image of the retina of an eye which is to be examined. The optical system has two groups of lenses which cooperate to form the image. The first lens group is in contact with the cornea of the eye of the patient via the eye... | 06/02/1981 |
| 4269478 | Constant-speed scanning lens system A constant-speed scanning lens system comprising a first, second, third, fourth and fifth lens components, the first lens component being a positive meniscus lens arranged concave toward the incident side, the second lens component being a negative lens, ... | 05/26/1981 |
| 4265519 | Wide-angle ophthalmoscope A wide-angle indirect ophthalmoscope that enables an operator to view the retina from the posterior pole to the equator as a single image. The ophthalmoscope has an observable field that can include the entire retina. The ophthalmoscope includes optical f... | 05/05/1981 |
| 4265518 | Variable magnification apparatus having illumination compensating ability Apparatus herein disclosed comprises a photographing system having an optical system of variable magnification and an illumination system having a light source for photographing and a light source for observing. In the apparatus, the existing photographin... | 05/05/1981 |
| 4264139 | Lens system for facsimile A lens system for facsimile comprising a first positive lens component, a second biconcave lens component and a third lens component consisting of a negative lens element and a positive lens element, said lens system having high OTF and assuring very low ... | 04/28/1981 |
| 4264152 | Visual stimulus deflector A deflector, through which a subject views a target or visual stimulus, can independently move the visual stimulus horizontally and vertically to stimulate or compensate the subject's eye movement and can alter the optical distance to stimulate or compens... | 04/28/1981 |
| 4264137 | Compact retrofocus type lens system A compact retrofocus type lens system having a first lens component of a positive meniscus lens with its convex surface facing the object side, second and third lens components of negative meniscus lenses with their convex surfaces both facing the object ... | 04/28/1981 |
| 4261648 | Pancratic objective An objective of the pancratic type includes a varifocal front lens group and a fixed-focus rear lens group, the latter consisting of five air-spaced singlets. The front lens group is constituted by a positive first component consisting of three singlets, ... | 04/14/1981 |
| 4261654 | Air gap type microscope objective A six member microscope objective having a numerical aperture of substantially 0.90 and a magnification of substantially 100x for use without oil is disclosed.... | 04/14/1981 |
| 4260227 | Automated kinetic perimetry apparatus and method A Goldmann-type perimeter is provided which automatically performs kinetic perimetry without the need for manual intervention.... | 04/07/1981 |
| 4258981 | Reproducing objective for video disks A reproducing objective for video disks comprising a first, second and third lenses in which the first lens is a biconvex lens, the second lens is a negative meniscus lens, and the third lens is a positive meniscus lens, the reproducing objective for vide... | 03/31/1981 |
| 4258980 | Retrofocus lens A retrofocus lens subtending a field angle up to 84° or more characterized by compactness, fast relative aperture, and good aberration correction. These characteristics are obtained by selection of the relative powers of a front negative and a rear posit... | 03/31/1981 |
| 4257689 | Pulse pattern visual acuity device A visual acuity device measures the visual acuity of a patient's eye by directing a pulsating beam of light on the eye and detecting the resulting reflection. A primary pattern having a pattern formed by transparent and non-transparent portions is positio... | 03/24/1981 |
| 4257679 | Reproducing objective for video disks A reproducing objective for video disks comprising a first, second, third and fourth lenses, the first lens being a plano-convex lens, the second lens being a plano-concave lens, the third lens being a positive lens, the fourth lens being a positive menis... | 03/24/1981 |
| 4256373 | Fish eye lens system An improved high speed fish eye lens system is provided capable of compensating for lateral chromatic aberration, field curvature and astigmatism while providing an aperture ratio of F/2.8. The fish eye lens system includes a first lens group of a negativ... | 03/17/1981 |
| 4255023 | Objective retinal response recorder A retinal response recorder that is fully automatic, comprises a light stimulator, with means for a patient to position his head, such that his eye is on the horizontal axis of the stimulator. Means are provided for selecting any one of the selected numbe... | 03/10/1981 |
| 4255022 | Method of and apparatus for examination of visual fields A microprocessor based instrument designed to retrofit into existing perimeters utilizing the mechanics and stimulus control aspects of the existing perimeter. The device includes an array board positioned adjacent the perimeter mechanical arm and include... | 03/10/1981 |
| 4253744 | Optical system for light measurement of an eye fund In a light measuring optical system for use in measurement of pulse waves in the artery at the eye fundus or oxygen saturation in the artery blood at the eye fundus, light for illuminating the eye fundus is converged on the surface of the cornea of the ey... | 03/03/1981 |
| 4252402 | Device for connecting a peripheral unit to an optical bus-line A device for connecting a peripheral unit to an optical bus-line which comprises a substrate onto which are integrated a first optical waveguide for being inserted in the path of the bus-line, a second optical waveguide for being connected to the emitting... | 02/24/1981 |
| 4251127 | Wide-angle door viewer A wide-angle door viewer providing a large wide-angle outdoor view which can be zoomed and is readily perceptible without closely approaching the eyepiece, which comprises an optical lens barrel having relatively large diameter lenses in positions of reve... | 02/17/1981 |
| 4251131 | Microscope objective An achromat microscope objective with high magnification comprising a first, second, third and fourth lens components, the first lens component being a comparatively thick meniscus lens, the second lens component being a positive meniscus lens with compar... | 02/17/1981 |
| 4251133 | Large aperture telephoto-lens The present invention relates to a large aperture telephoto-lens consisting of a positive front lens group including a positive lens, a negative lens and a positive lens in sequence and a rear lens group arranged distant from the front group on the optica... | 02/17/1981 |
| 4249798 | Miniature camera with zoom lens Improvements in an optical system for a compact camera having an improved form of a zoom objective lens arranged substantially enclosed within the housing of the camera which is made compact by a twice folded optical path and a through-the-lens viewing sy... | 02/10/1981 |
| 4249799 | Connector for optical devices The disclosure is of a device for connecting togetheer two optical devices, and is primarily intended for quick connection and disconnection of two optical devices such as an endoscope and a viewing tube or two lenses.... | 02/10/1981 |
| 4249802 | Ophthalmological instrument An ophthalmological instrument having optical elements providing an examination light beam path and an illumination light beam path. The optical elements include an objective for producing an inverted magnified flattened image of the fundus of the eye, an... | 02/10/1981 |
| 4249826 | Method and device for analyzing and measuring out constituents of solid or liquid media A device useful for the analysis and measurement of the constituents of solid or liquid media consists of a hermetically closed container containing chemical or biological reactants necessary for the analysis, in liquid, lyophilized or solid form. The con... | 02/10/1981 |
| 4249824 | Apparatus for measuring wheel alignment of motor vehicles The system of the present invention provides means for quick and accurate measurement of various wheel alignment parameters of motor vehicles by the use of reflected light beams. A laser source mounted near the front end of the vehicle provides a pair of ... | 02/10/1981 |
| 4248505 | Ophthalmological instrument An ophthalmological instrument for stereoscopic examination of the fundus or retina of the eye of a patient, and documentation thereof, as by photographing it. The instrument provides an observation light beam path, and an illumination light beam path. In... | 02/03/1981 |
| 4248506 | Eye fundus observing optical system An eye fundus observing optical system which can perform the diopter correction of the inner focus type by the construction that a relay lens system for forming a second fundus image from a first fundus image formed by an objective lens is constituted by ... | 02/03/1981 |
| 4248496 | Riflescope with data display in field of view A riflescope is provided with an auxiliary optical system for forming an internal image of data or information disposed outside of the normal eyepiece field of view. A primary application of the system is to transfer an optical image of a target-range fig... | 02/03/1981 |
| 4247171 | Compact photographic lens with large aperture The present invention relates to a Gauss type lens, comprising a first positive meniscus lens whose convex surface is directed to the object, a second positive meniscus lens whose convex surface is directed to the object, a third negative meniscus lens wh... | 01/27/1981 |
| 4243327 | Double-beam optical method and apparatus for measuring thermal diffusivity and other molecular dynamic processes in utilizing the transient thermal lens effect A method and apparatus for measuring thermal diffusivity and molecular relaxation processes in a sample material utilizing two light beams, one being a pulsed laser light beam for forming a thermal lens in the sample material, and the other being a relati... | 01/06/1981 |
| 4241981 | Compact wide angle zoom lens A compact wide angle zoom lens in order from the object side, of a divergent front lens group and a convergent rear lens group, the overall focal length being variable by mechanical movement of the front and rear lens groups. The divergent front lens grou... | 12/30/1980 |
| 4241983 | Telephoto lens A telephoto lens comprising; a front lens group comprising a positive lens, a negative lens and positive lens arranged in the written order from the object side, and having a positive refracting power, and a rear lens group arranged with a large space fro... | 12/30/1980 |
