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Document |
Document Title |
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4266534 |
Illumination unit for endoscope
An illuminating unit for endoscopes includes a light guide member and a cover glass disposed forwardly of the light exiting end face of the light guide member and located within an illumination...
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4208086 |
Three-dimensional projection system
A projection system for providing a magnified image from a holographic transparency in which the transparency is illuminated from one side by a laser, and two lens are serially arranged on the...
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4203651 |
Optical apparatus for varying focal power along one principal meridian while maintaining constant focal power along the other principal meridian
An apparatus, including a pair of spaced-cylinder lenses having their cylinder axes in one plane with a third cylinder lens slideably mounted on a carriage therebetween and having its cylinder axis...
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4192579 |
Behind-stop type lens system for photographic cameras
A lens system for photographic cameras which has a very short total length and wherein aberrations are favorably corrected. Said lens system comprises a first positive meniscus lens component, a...
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4167333 |
Automatic distance compensating sight and process of sighting
A sighting lens has a refraction displacement of the image such that upon selected positioning of the lens on a weapon, such as an archery bow, and using a reference point therewith, a novel...
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3990798 |
Method and apparatus for aligning mask and wafer
In a semiconductor photolithographic mask alignment system, a unique bifocus element is included in the microscope for permitting simultaneous focusing on the mask and semiconductor wafer surface,...
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3794409 |
METHOD AND APPARATUS FORMING PLURAL FOCUSED IMAGES WITH A COMMON LENS SYSTEM
Method and apparatus for focusing a selected portion of an object at a conjugate plane different from the conjugate plane of focus of other portions of the object. A focus change member made of a...
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3753611 |
BIFOCAL MAGNIFYING GLASS TO BE HELD IN FRONT OF ONE EYE
The invention relates to a magnifying glass to be held in front of one eye and having one or more turnable lens systems with different fields of vision.
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3724924 |
MULTIPLE FOCUSING DEVICE
A multiple focusing device for radiation made up of a plurality of right prisms each having a corresponding end or base cut and polished to form a spherical cap producing a focal point for the...
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3620600 |
LENS WITH FACETS FOR PROJECTING LIGHT ALONG DIFFERENT AXES
An improved lens for a signal device which projects a signal along a roadway is constructed as follows. A light-transmitting member is provided which has inner and outer faces. The inner face of...
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3614215 |
FLUID BIFOCAL SPECTACLE
A bifocal spectacle having a composite split lens with a fluid compartment therein for receiving a refractive fluid, whereby the lens will have a first focal length when the fluid compartment is...
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3610924 |
METHOD OF MAKING BIFOCAL LENSES COMPRISING TREATING A PRESELECTED AREA OF A SINGLE FOCAL LENGTH LENS WITH IONIZING RADIATION
A method for obtaining corrective glass lenses which are provided with at least two zones having different powers so that one zone serves to view nearby objects and the other Zone serves to view...
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3594075 |
BIFOCAL OPHTHALMIC LENS
An optical device comprising a body formed of two sets of alternately disposed light-transmitting laminar sections through which light from a common optical field is directed, the two sets of...
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3551029 |
ANAMORPHOTIC COMPONENT WITH TWO PAIRS OF OPPOSITELY ORIENTED PRISMS
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3535015 |
DUAL-CAPACITY OPTICAL SYSTEMS
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3506355 |
COMPACT ARRANGEMENT OF TWO OPTICAL OBJECTIVES FOR TRANSMITTING AND RECEIVING RADIATION
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3481672 |
F.M. LASER CONTOUR MAPPER
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3420006 |
APPARATUS FOR GRINDING MULTIFOCAL LENS
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3339997 |
Bifocal ophthalmic lens having different color distance and near vision zones
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3331277 |
Character projection device
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3327585 |
Optical system
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3318185 |
Instrument for viewing separation color transparencies
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3222981 |
Two-element projection lens
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3179797 |
Device for controlling glare in luminaire
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3138650 |
Optical system
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3053144 |
Optical projection display devices
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3020803 |
Multifocal lens
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3015988 |
Perspective alteration means
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3014405 |
Binocular bifocal magnifier and illuminator
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3010366 |
Lens
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3004470 |
Multiple focal length lens
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2940372 |
Anamorphic adapter arrangement
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2878721 |
Multifocal ophthalmic lenses
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2811081 |
Universal focal length photo-objective system
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2796800 |
Motion picture time correlating apparatus
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3588227 |
Title is not available
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