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5272565 |
Compact zoom lens system
The invention provides a compact zoom lens system which has an angular coverage from wide angle to moderate telephoto and makes a relatively bright and parallax-free TTL finder possible and in...
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5255666 |
Solar electric conversion unit and system
A solar electric conversion unit and system includes substantially increased efficiency with reduced losses and increased acceptance angles. The system employs a short focal length fresnel lens...
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5245175 |
Focus detecting optical system including a plurality of focus blocks composed of an integrally molded prism member
A focus detecting optical system comprises two imaging optical systems which are composed of an integrally molded prism, and is adapted to perform focus detection on the basis of relative...
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5241423 |
High resolution reduction catadioptric relay lens
An optical system of a NX reduction catadioptric relay lens having sub-half micron resolution over the ultraviolet band width is described. A spherical mirror with a stop at the mirror is used to...
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5187359 |
Electronic imaging device for use with photographic cameras for minimizing astigmatism
An electronic imaging device comprises a photographic lens system, a thin half mirror obliquely intersecting with the optical axis of the photographic lens system and an electronic image pickup...
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5136421 |
Thermal imaging system and method using scene-average radiation as a thermal reference
A pupil/image reversal prism (FIG. 2) forms a pupil at an image location. Such a prism has specific applicability in a DCR scheme for a thermal imaging system (FIG. 3a, 31 and 32) in which a...
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5107373 |
Arrangement for turning image projected on image screen
An arrangement for turning an image projected on an image screen has an image screen, a trapezoidal prism for image turning, and an optical system for image producing. The prism has an entry...
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5099361 |
Projection lens and projection television system using the same
A projection lens for projecting images displayed on an image display device having angle-of-view dependency has high image focusing characteristics corresponding to high definition images, wide...
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5074646 |
Planar reflective optical devices
Alignment difficulties in optical computing arrangements are overcome by integrating the optical components on a single substrate and arranging the elements in a manner that causes them to interact...
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5052802 |
Device for viewing beneath circuit boards
A hand-held, portable, visual inspection aid is described which has a variety of uses in diverse fields, e.g., manufacturing, service and repair industries, health care field, hobby field, etc. The...
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5042929 |
Projection lens and projection system
A projection lens enlarges and projects optical images in a matrix type light valve onto a screen. The projection lens includes a front lens group of the retrofocusing type; a rear lens with...
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5039213 |
Optical equipment with a semitransparent mirror
In an optical system a semitransparent mirror which is disposed at a predetermined angle with respect to an optical axis and which has a semitransparent surface (for instance, a front surface) and...
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5033833 |
Omni-directional optical antenna element
An omni-directional antenna for use with light or other electromagnetic radiation has a surface extending outward from a central axis. The surface can be either radially symmetrical or...
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5022725 |
Optical sensor
An optical sensor comprising a light detector, a converging lens located between the light detector and a light source, the light rays from which are detected by the light detector, and a light...
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5007713 |
Beam converting apparatus with a parallel light beam input and output from one prism plane
The present invention presents a beam converting apparatus which comprises a semiconductor laser element, means for converting the laser beam from the semiconductor laser element into a parallel...
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5005959 |
Illumination system
An illumination system applicable to contact or proximity exposure apparatuses provides excellently collimated light without any irradiance reduction in the peripheral area of an object to be...
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4988166 |
Sighting arrangements
A sight for aiming a spotlight on a particular target, such as a performer on stage, has a partially reflective panel supported on the spotlight in an inclined position through which the operator...
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4981343 |
Focusing mirror lens
The improved focusing mirror lens reduces the ellipticity of the output beam of a laser diode or the like light source and corrects astigmatism of the beam so that beam light can be focused to a...
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4963021 |
Photoelectric switching apparatus
A photoelectric switching apparatus comprises: a light projecting device; a photo sensing device; an objective lens having a double structure comprising an outer peripheral portion and a central...
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4953960 |
Optical reduction system
An unobscured catadioptric optical reduction system wherein all refractive elements are made of the same material. From its long conjugate end to its short conjugate end the system comprises a...
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4930881 |
Image pickup optical system
The reflecting mirror for leading the image forming light bundle emitted from an image pickup optical system to an image forming surface has an area for reflecting the effective image forming light...
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4900140 |
Rear monitoring device for vehicle
A rear monitoring device for a vehicle capable of being installed in the interior of a vehicle to enable a driver to observe therethrough the area to the rear of the vehicle. The rear monitoring...
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4889426 |
Microscope photometer tube
A photometer tube for microscopes is provided with a device by means of which the measurement field diaphragm of the photometer is superimposed on the intermediate image of the object in the...
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4868821 |
Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5
The movable range of an objective of an optical pickup device used in optical disc reproducing apparatus is increased and the size of the device is reduced by moving the objective solely or in...
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4854688 |
Optical arrangement
A compact optical arrangement for transfer of large field of view images to the pupil of a viewer, said optical arrangement including a cooperative collimator/combiner and ball lens, wherein the...
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4852983 |
Distance simulator
An optical system simulates the optical effect of traveling over a large distance on light traveling from a first reference surface to a second reference surface. The first and second reference...
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4840466 |
Changeable magnification optical system
An optical system of changeable magnification comprising a master lens arranged normally in axial alignment to an image receptor to be switchable to another light path which includes a rear...
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4838668 |
Zoom lens
A zoom taking lens for a photographic single lens reflex (SLR) camera. The lens has an air space between elements of the lens, which air space is large enough to accommodate reflective means for...
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4828372 |
Wide-angle zoom lens
A compact wide-angle zoom lens with short back focus comprises a forwardmost negative power lens unit movable for focusing and compensation during zooming, followed by a positive power variator...
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4818065 |
Optical device particularly useful as as night vision goggles
An optical device comprising a monocular assembly including an objective lens to be located remote from the viewer's eye for viewing a scene, and a cathode ray tube and prism assembly for injecting...
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4815833 |
Objective for endoscopes and process for its production
An objective for endoscopes with a lateral objective lens comprises an elongated prism having a convex proximal end surface and a distal end on which are joined by cementing after alignment on an...
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4801197 |
Adaptor for microscopes providing an odd number of reflections for providing an even number of reflections in conjunction with additional microscope reflection means
An adaptor for microscopes provided with a first reflecting device reflecting incident light an even number of times to emit the light in a direction making a predetermined angle with the incident...
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4798452 |
Autoclavable laser beam manipulator
An autoclavable laser beam manipulator, made of non-corrosive materials forming its elements which in turn contribute to a novel construction for this instrument that is used with endoscopes of all...
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4795237 |
Optical inspection method with side-viewing mirror
An optical inspection method particularly suitable for viewing objects such as components on printed circuit boards, comprises the steps of viewing an object from above with a magnifying optical...
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4756604 |
Liquid crystal device using a Fresnel collimating lens for improving uniformity of display contrast ratio
There is disclosed a liquid crystal display device having very uniform contrast ratio for use with such a projector as an overhead projector. The liquid crystal display device comprises a liquid...
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4755921 |
Lens
A lens of a transparent material including a structured surface on one side and a smooth surface on the opposite side. The structured surface includes a plurality of three-faceted prisms arranged...
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4753523 |
Low magnification projection objective lens
A low magnification projection objective lens for use in projection examination instrument. The projection objective lens comprises three lens units. The first unit is a converging lens unit...
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4750810 |
Camera optics for producing a composite image from two scenes
Lenses (10,11) , e.g. for a camera for a video conferencing system, have divergent optical axes and focus real images via prisms (20,21,22,23) on to a focal plane f. A prism (20) in one path...
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4746203 |
Optical system for endoscope
An optical system is disclosed for an endoscope having a generally tubular distal end in which an objective lens assembly and an image sensor in the form of a solid-state video camera are...
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4742219 |
Apparatus for detecting the focusing state and positional accuracy of a light beam directed onto an optical disk tracking guide in an optical read/write system
Optical apparatus for controlling the focusing and positional accuracy of a light beam incident on an optical disk tracking guide in an optical read/write system. Laser beams are converged by an...
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4731527 |
An astigmatic focusing system with optical elements oriented to produce astigmatism in a predetermined direction to maximize detector sensitivity
An optical pickup for astigmatic focusing on an optical disk. A planar beam splitter reflects light from a source through an objective lens to the recording track of the disk. The light reflected...
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4723846 |
Optical path length compensating optical system in an alignment apparatus
An optical path length compensating device comprises a first objective having one focus coincident with a two-dimensional plane and provided for movement along the two-dimensional plane, a second...
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4711527 |
Simulated vehicle lamp
A simulated vehicle lamp for use in modeling a vehicle comprises a pliable light reflecting sheet, a pliable simulated lens sheet, and a pliable magnifying lens sheet interposed between the light...
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4709139 |
Coma correction in optical head with astigmatism for focusing error detection
In an optical head having a plate-like half mirror functioning both as a beam splitter and for producing an astigmatism usable in detecting a focusing error, an optical element is provided for...
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4697882 |
Beam splitter for changing optical paths small tilt
In the disclosed beam splitter, a first prism has an entrance face, an inclined face, and a mirrored face for totally reflecting a beam reflected from the inclined face back to the inclined face. A...
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4678321 |
Anamorphic focusing system
An anamorphic focusing system includes a focusing device including a roof-mirror-lens array for focusing an image of an object, and a cylindrical lens disposed in an optical path extending from the...
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4673262 |
Compact finder
The disclosed finder includes an optical system having an optical axis and an image plane, an eyepiece lens conjugately arranged at the rear to observe the image plane, a plurality of lens units,...
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4671625 |
Optical apparatus for producing a natural, viewable and optically interactive image in free space
Apparatus for producing a natural, viewable and optically interactive image of a luminous object which appears to float in free space at a location different from the location of the object. The...
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4668056 |
Single lens having one aspherical surface
A single lens is described for forming of a scanning spot on an information surface of a transparent record-carrier substrate. The lens has one aspherical surface and one spherical or plane...
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4657357 |
Illumination system for single objective lens binocular microscope
An illumination system is provided for a single objective lens-type binocular microscope. The arrangement features a slot cut in a single objective lens. A prism is inserted into this slot. An...
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