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6124988 |
Objective lens
An objective lens that allows spherical aberration to be suppressed during the reproduction of a CD without sacrificing reproduction characteristics of a DVD, has a first numerical aperture...
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6057970 |
Apparatus for enhancing depth of focus using birefringent material
The present invention relates to an apparatus for forming fine patterns in semiconductor devices, display devices and micro-electro-mechanical systems and more particularly to an image projecting...
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6052237 |
Objective lens and scanning device using such an objective lens
A scanning device for optical record carriers is provided with an objective lens (7) suitable for scanning record carriers (1, 21) having a transparent substrate (2, 23) of different thicknesses....
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6049433 |
Device for equalizing light strength of light source
A light strength equalizing device for a light source is provided. The device includes an illuminated area, a light source emitting a light for illuminating along a light path the illuminated area...
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5973846 |
Offset spectra lens system for a two spectra automatic focusing system
An improved auto-focus system for a digital camera has a lens designed to have the focus of two spectra offset from each other by a predetermined amount. The two offset spectra are used to...
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5856860 |
Multi-focal optical elements
A multi-focal lens with both a power portion and a functional portion, where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and...
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5835283 |
Condenser lens for optical disks
A condenser lens to be used for an optical head capable of recording or reading information on or from optical disks having different substrate thicknesses in an optical disk device such as a CD or...
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5815293 |
Compound objective lens having two focal points
A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the...
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5784209 |
Multi-axis optical lens
An optical lens is disclosed that is suitable for use in a line scanner or analogous device. The lens has multiple optical axes individually corresponding to a respective refractive combination...
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5757459 |
Multifocal optical elements
A multi-focal lens with both a power portion and a functional portion where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and...
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5734512 |
Dual-focus objective lens of optical pickup
A dual-focus objective lens for an optical pickup which is compatible with both 0.6 mm and 1.2 mm disks is compensated in its aberration with respect to a light spot on a recording plane of the...
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5710668 |
Multi-color head-up display system
A multi-color optical display system (10) employs a multi-powered reflective combiner (20) that together with a monochromatic or partly color-corrected relay lens (16) longitudinally corrects a...
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5665957 |
Lens device comprising light blocking means and an optical pickup apparatus using the lens device
A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective...
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5623365 |
Diffractive optical element for use within a projection lens system
A projection lens system with a high resolving power and a wide exposure area which is effectively corrected for various aberrations including chromatic aberration and which is compact and has...
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5530595 |
Variable focus color corrected field lens
A variable focus color corrected field lens for accepting rays having a divergence of from 0, wherein the rays are collimated, to a divergence of 10 milliradians full angle and directing the rays...
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5515206 |
Multi-facet lens component
A multi-facet lens member for use in an optical device such as a conventional camera or a video camera, comprising: (a) a multi-facet optical lens having at least four optical surfaces arranged in...
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5459615 |
Miniature fixed-focal-length lens system
A miniature fixed-focal-length lens system includes a lens group which consists of a plurality of lenses and has a positive refracting power and a stop disposed on the object side of the lens...
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5452384 |
Optical integrated lensed connector for focussing oblique incident light
An optical connector comprises a series of transparent substrates 50-53 including a refraction type lens 10 embedded in the central substrate 50, two beam deflection elements 40 and 41 offset from...
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5402510 |
Method of preparing an optical fiber with multiple lenses to optimize coupling with a phototransducer, and an optical system obtained thereby
The present invention relates to a method of preparing an optical fiber for optimum coupling with a phototransducer, comprising the following steps: cleaving an end surface on an optical fiber; and...
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5402261 |
Phase conjugation device
The phase conjugation device includes at least one non-linear medium and an optical focussing system producing at least two focal points within the non-linear medium and capable of focussing light...
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5381266 |
Stereoviewer including lenses of varying focal distance
A stereoviewer for observing a stereo pair of photographs three-dimensionally through binocular lenses is shown and described. The stereoviewer comprises a box-shaped main body case having a space...
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5239416 |
Variable power zoom stand magnifier
A two lens stand magnifier having variable degrees of magnification of an object at a constant distance from an observer is disclosed. A permanently mounted plus lens and a movably mounted minus...
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5233470 |
Variable lens assembly
Disclosed is a variable lens assembly having a water chamber defined with a front lens holder between two flexible, transparent diaphragms and filled with a fluid, and a syringe connected to the...
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5218470 |
Stereoviewer including holder portions for inclining stereoscopic photographs
A stereoviewer for observing a stereo pair of photographs three-dimensionally through binocular lenses is shown and described. The stereoviewer comprises a box-shaped main body case having a space...
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5189294 |
Transform lens with a plurality of sliced lens segments
A sliced transform lens is used to combine and focus the optical output signals of a planar M by N laser diode array onto M detector elements in a linear detector by displacing lens slices. A...
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5175651 |
Multi-focus system for a low light level vision apparatus
A night vision apparatus 10 includes a first focusing refracting lens 28 which focuses light rays 29 from distant scene 14 onto a light intensifier 30. The kinoform 40 or bifringent lens 78 are...
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5117306 |
Diffraction bifocal with adjusted chromaticity
A diffraction bifocal lens or lens system, comprising two profiled surfaces or interfaces or a linear combination thereof, wherein one profile provides for the bifocality of the lens and the other...
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5080456 |
Laser scanners with extended working range
A bar code scanner is disclosed employing a laser source and scan mirror for generating a light beam for scanning a bar code symbol or the like. The working range for distance between the scanner...
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5080472 |
Multifocal optical lens
A multifocal lens useful as a contact lens or implantable as an intraocular lens which comprises at least 3 zones, the first zone comprising a polymer of a specified refractive index, the second...
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5059008 |
Wide angle beam steerer using translation of plural lens arrays
A beam steering arrangement for a plurality of beams of electromagnetic radiation from a like plurality of sources arrayed with a preselected source-to-source spacing includes a first lens array....
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5027144 |
Lens changer for cameras
Described herein is a lens changer for camera, which is provided with a unitary lens body integrally and contiguously formed with a main lens portion and at least one replacement lens portion of a...
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5027202 |
Picture transmission system of optical wave guide guided missiles
The invention relates to a picture transmission system of a guided missile which is connected with a ground facility by way of an optical wave guide. This system is arranged that, without any...
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5017000 |
Multifocals using phase shifting
This invention relates to a multifocal optical lens configuration that relies on the phenomenon of simultaneous vision whereby the eye is presented with two clear images at once. In particular this...
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4995714 |
Multifocal optical device with novel phase zone plate and method for making
A diffractive multifocal optical element comprising a phase zone plate of a Cohen lens design containing rotationally symmetrical, curved repetitive patterns designed to operate at a specific...
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4964718 |
Optical corrector
An optical projection system is provided wherein a light valve supplies an aperture consisting of spatially separate colors for projection by a plurality of projection lenses to a projection plane....
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4950057 |
Progressive multi-focal ophthalmic lens
A progressive multi-focal ophthalmic lens having a front refracting surface and a rear refracting surface one of which is a progressive surface whose refractive power changes continuously with the...
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4944584 |
Plastic multifocal point spherical lens
A plastic multifocal point spherical lens comprising a unitary structure of (A) a first synthetic resin layer having a fixed refractive index, (B) a second synthetic resin layer having a...
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4927241 |
Optical imaging system having an electronically variable focal length and optical image sensor provided with such a system
An imaging system having an electronically variable focal length is obtained by arranging, one after the other, a lens system (10) different sectors of which have different focal lengths and a...
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4883548 |
Process for producing laminated ophthalmic lens
According to the present invention, a plurality of first lens elements each having specific lens optical values and a plurality of second lens elements each having specific lens optical values are...
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4804249 |
Optical filter for incoherent imaging systems
An optical filter for use with an imaging lens in an incoherent imaging system operating in broadband illumination for increasing the depth-of-focus of the lens while maintaining energy thru-put is...
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4799778 |
Fresnel lens concentrator
The Fresnel lens concentrator is formed by a specially designed Fresnel lens and a solar cell located on the axis of the lens at its focal plane. The lens is designed so that its central facets...
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4775229 |
Fresnel lens in a finder optical system
A Fresnel lens provided in the finder of a camera includes a central portion through which an optic axis passes, and a plurality of annular portions spaced apart from the central portion and...
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4741605 |
Multifocal objective
The present invention relates to an image-forming objective which is capable of forming sharp images of objects at at least two different distances from the objective, there being arranged at one...
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4641934 |
Ophthalmic lens with diffractive power
An ophthalmic lens incorporates a transmission hologram which has negative diffractive power and introduces positive longitudinal chromatic aberration to add to the natural longitudinal chromatic...
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4630274 |
Method and apparatus for generating short intensive pulses of electromagnetic radiation in the wavelength range below about 100 nm
In a method and an apparatus for generating a hot plasma which emits elecmagnetic radiation in the wavelength range below about 100 nm in a predetermined volume, in which a laser radiation pulse of...
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4514048 |
Variable focus elastomeric lens system
A variable focus lens system comprising an elastomeric lens structured to undergo shape changes and corresponding focal length changes in a continuous manner over a predetermined range in response...
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4501493 |
Apparatus for detecting a position of an optical pickup
An apparatus for detecting a position of an optical pickup is disclosed in which there are provided a lens having lens areas of four quadrants sectioned by two planes, each including an optical...
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4474437 |
Teaching aid for simulating gravitational bending of light
A lens for simulating the effect of gravity from a galaxy on light from a source effectively positioned at infinity with the light passing through the galaxy, the optical properties of the lens...
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4469396 |
Afocal dual magnification refractor telescopes
An afocal dual magnification refractor telescope is formed by a fixed focus achromatic telephoto objective system (21) formed by a primary objective lens element (H) and a secondary objective lens...
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4376889 |
Low light level vision apparatus
Low light level or night vision apparatus, and particularly goggles, having an objective lens to focus incident light on to an image intensifier and a magnifier enabling an observer to view a...
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