Matches 51 - 78 out of 78 < 1 2
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5262896 Refractive elements with graded properties and methods of making same  
Methods of making gradient property refractive elements such as gradient index lens blanks. The spatial distributions of constituents achieved by subjecting various starting assemblages to various...
5253323 Method of manufacturing a graded optical transmission medium made of synthetic resin  
A method of manufacturing a multimode optical transmission medium from a synthetic resin having the distribution of refractive index varying continuously in a fixed direction. In the method, the...
5239413 Objective lens system for microscopes  
A high performance objective lens system for microscopes comprising a plurality but a very small number of lens elements at least one of which is designed as an axial GRIN lens element.
5212707 Array of diffraction limited lasers and method of aligning same  
A one-dimensional semiconductor laser array assembly typically comprising a one-dimensional semiconductor laser array, a heatsink upon which the laser array is bonded, and a lens assembly. The...
5200858 Uni-directional gradient index of refraction glasses  
Tailored glass bodies (10) having a substantial change in index of refraction (a Δn of at least about 0.08 along an axis) are provided. The glass body is characterized by two substantially...
5166827 Gradient index optical element  
A gradient index optical element includes a first metal which is at least one kind of metal selected from the metals of Group A each having the content of 10-40 mol % in terms of oxide and a second...
5161063 Objectives for an optical data storage head  
An objective for an optical data storage read/write head focuses a laser beam at a spot on an optical recording surface protected by a transparent cover of an optical disc. The imaging is provided...
5050970 Lens system for use in optical information device  
A two-group two-element lens system for use in an optical information device includes a first lens adapted to be positioned closer to a light source and having a flat surface which is symmetric...
5044737 Double axial gradient lens and process for fabrication thereof  
A monolithic double-axial gradient lens (30) is provided. The lens has an optic axis and three sections perpendicular to the optic axis: a first section (34) having a first graded index of...
5029994 Large-aperture quasi-telephoto lens system  
A large-aperture quasi-telephone lens system having favorably corrected aberrations, especially chromatic aberration, and providing images of high quality comprising, in the order from the object...
5011272 Compact zoom lens  
A zoom lens including at least two lens units of which the front one is of positive refractive power and the rear one is of negative refractive power, the units being axially movable to decrease...
4974947 Refractive index distribution type meniscus lens and optics  
A refractive index distribution type meniscus-shaped single lens characterized in that it has a refractive index distribution in which the refractive index decreases along the optic axis thereof...
4952037 Plate microlens and method for manufacturing the same  
In a plate microlens of the invention wherein gradient index lenses each having an optical axis along a normal to a surface of a transparent base and a refractive index profile gradually changing...
4930880 Graded refractive index lens  
A graded refractive index lens having refractive index distribution in the direction along the optical axis, a meniscus shape and a capability to correct aberrations, especially chromatic aberration.
4929065 Glass plate fusion for macro-gradient refractive index materials  
A glass block (10) comprises a plurality of intermediate glass plates (12i) stacked between a top plate (12t) and a bottom plate (12b). The top and bottom plate each have a selected composition,...
4907864 Macro-gradient optical density transmissive light concentrators, lenses and compound lenses of large geometry  
Gradient optical density transmissive light directing devices (24, 26, 28, 30) and fabrication thereof are disclosed herein. Example of such devices include concentrators, lenses and compound...
4840467 Compact zoom lens system with a high zooming ratio  
A compact zoom lens system with a high zooming ratio comprises, in order from the object side, a first lens group having a positive refracting power, a second lens group having a positive...
4810069 Collimator optical system for effecting elliptical-to-circular conversion  
A collimator optical system for effecting elliptical-to-circular cross section is disclosed which comprises two lenses in a slab form whose refractive index distribution in one plane is such that...
4810070 Lens system having a good image performance for white light  
A lens system has a lens unit comprising a positive lens and a negative lens. The positive lens has an index distribution in the direction of the optic axis. The value of the index gradient for a...
4758071 Collimator lens  
A collimator lens meets conditions that: (i) at least the outgoing surface is spherical; (ii) the lens comprises at least an index-varying region in which the refractive index varies in the...
4730906 Bright wide-angle zoom lens  
A compact and high-performance bright wide-angle zoom lens comprising, in order from the object side, a front group having a negative refractive power and a rear group having a positive refractive...
4462662 Imaging system utilizing a gradient index lens array compensated for non-uniform object illumination  
A gradient index lens array used in an optical imaging system is modified so as to compensate for factors creating a non-uniform image exposure at an image plane. Various parameters of the...
4371232 Graded gap semiconductor optical device  
A variable temperature method for the preparation of single and multiple taxial layers of single-phase (e.g., face-centered cubic), ternary lead chalcogenide alloys (e.g., lead cadmium sulfide [Pb...
4245890 Gradient index of refraction for missile seekers  
A missile having a sensor in the nose thereof. The nose is in the shape of transparent ogive window which has an index of refraction that assumes different values at different positions on the...
4099835 Optical fibers with helical gradations in composition  
This application discloses a technique for producing optical fibers with longitudinal variations in index of refraction. The deposition apparatus is arranged to allow for the formation of an...
3873408 Method of producing a refractive index gradient in glass  
Method of increasing the refractive index of a surface layer of an alkali-silicate glass by diffusing ions of silver, thallium, copper, or combinations thereof into the glass at temperatures of...
3729253 OPTICAL SYSTEM COMPRISING A SINGLE ELEMENT HAVING A CONTINUOUSLY VARYING INDEX OF REFRACTION  
Singlet lenses, and optical systems comprising a singlet lens and a stop, in which at least third-order distortions such as spherical aberration, coma, astigmatism and distortion are reduced by the...
3667832 Title is not available  
Matches 51 - 78 out of 78 < 1 2