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30results about How to "Less aberration" patented technology

Ophthalmic lens synthesized from its specification

This invention relates to a novel prescription lens (58), mainly suited for ophthalmic applications. The lens designer defines the macroscopic surfaces of the lens (59, 60) as desired. The design process assumes that the location of the object (50), the lens (51), and the required image (53) are known. By using Ray-tracing technique we calculate the microscopic normals to the lens that will form the required image. From those microscopic normals we calculate microscopic surface by a process of summation the slopes with geometric pattern conditions. The final surface is not smooth but contains plenty of dense microscopic shapes that look like saw-teeth. That rough surface enables the lens to have almost any desired shape and thickness.
Owner:GIL THIEBERGER

Sharpness metric for vision quality

InactiveUS7077522B2Remove wave aberrationSubjective blurRefractometersSkiascopesQuality of visionPoint spread function
A vision metric, called the sharpness metric, indicates the subjective sharpness of a patient's vision by taking into account both the wavefront aberration and the retinal response to the image. A retinal image quality function such as the point spread function is convolved by a neural quality function, and the maximum of the convolution over the retinal plane provides the sharpness metric. The sharpness metric can be used to control eye surgery or the fabrication of a lens.
Owner:UNIVERSITY OF ROCHESTER

Device and method for dark field illumination

Disclosed is a dark field illumination apparatus which is capable of performing a dark field illumination which exhibits a sufficient brightness and a sufficiently suppressed unevenness in brightness. The apparatus comprises a shaping system for shaping a light beam from a light source into approximately parallel beam having a ring- shaped section; a fly-eye optical device for forming a plurality of light source images in the vicinity of its exit plane based on the approximately parallel beam, the light source images being arranged circularly; and a light collection optical system for collecting light beams from the light source images and superposing them on an object plane.
Owner:NIKON CORP

Panoramic multi-scale imager and method therefor

A panoramic imager comprising a mirror and a multi-scale imaging system is presented. The multi-scale imaging system comprises an objective lens and a plurality of cameras that is arranged in a non-planar arrangement at the image field of the objective lens. The objective lens reduces a first aberration introduced by the mirror, and each camera further reduces any residual first aberration. As a result, panoramic imagers of the present invention can provide improved image quality and higher resolution than panoramic imagers of the prior art.
Owner:APPLIED QUANTUM TECH +1

High mass resolution low aberration analyzer magnet for ribbon beams and the system for ribbon beam ion implanter

The present invention provides a mass analyzing magnet which can bend a very wide charged particle ribbon beams through angles between 90 to 200 degrees. The shorter dimension of the ribbon beam is aligned with the magnetic field. The magnet can focus the longer dimension of the ribbon beam through a resolving slot inside the magnet for mass or momentum analysis. The magnet pole is shaped to increase the mass resolving power and to provide the focusing force in the direction of the shorter dimension of the ribbon beam. This magnet can achieve high mass resolving power with very small system aberrations for very wide ribbon beam. This feature is of significant value, for example, in the ion implantation industry. The ribbon beam width can be 300 mm, 450 mm and even 1000 mm. Integrated with the present invention, the ion implanter systems can be built to provide mass analyzed ribbon beams for various applications. The system will have much lower cost and much better ribbon beam quality than the ion implanters which are using conventional mass analyzing magnet.
Owner:HUANG YONGZHANG +1

Wearable display apparatus

Provided are a wearable display device and a light guide element thereof, the display device including: a display element configured to project a first light forming a virtual image; and a light guide element configured to guide the first light from the display element and a second light input from outside of the wearable display device to a predetermined position. The light guide element includes: a first optical surface facing the display element; a second optical surface and a third optical surface configured to reflect the first light input through the first optical surface; and a fourth optical surface configured to reflect the reflected first light to the predetermined position. The first to third optical surfaces are flat surfaces, and the fourth optical surface is a rotationally asymmetric reflective surface.
Owner:SAMSUNG ELECTRONICS CO LTD

Apparatus for measuring quality of laser beam

InactiveCN1800794AInstantaneous and accurate measurementAccurate measurementPhotometryLight spotOptoelectronics
The quality measurement device for laser beam comprises: a focusing lens, an attenuation sheet of a diffuse scattering board, a CCD to collect light spot, a computer with high-speed collection card, and a light splitter contained a first plate with inner surface of 100% reflectivity and a second plate with inner surface of 90~99% reflectivity both 45Deg parallel laid in light path. Wherein, there is a malposition m between two plates and an antireflection coating on outer surface of the second plate. This invention can measure accurately for Gauss beam or non-Gauss beam with power-in-barrel ratio method, and has simple structure with well stability.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Ultra wide angle imaging optical system, ultra wide angle imaging lens device, and image sensing apparatus

An ultra wide angle imaging optical system includes, in order from an object side, a first lens group, an aperture stop, and a second lens group. The first lens group includes, in order from the position closest to the object side, a negative meniscus lens element convex to the object side, a negative lens element, and a negative lens element. The second lens group includes a plurality of positive lens elements. The first lens group and the second lens group each includes at least one anamorphic surface having different optical powers with respect to a first section extending in a first direction on a flat plane substantially orthogonal to an optical axis, and with respect to a second section extending in a second direction substantially orthogonal to the first direction. The first lens group includes the lens element satisfying the following conditional formula (1):−0.6<(Ph−Pv)*(fh+fv)<−0.1  (1)wherePh: an optical power in the first direction where a viewing angle is large;Pv: an optical power in the second direction where the viewing angle is small;fh: a focal length in the first direction with respect to the entirety of the optical system; andfv: a focal length in the second direction with respect to the entirety of the optical system.
Owner:KONICA MINOLTA OPTO +3

Reflection optical system and projection display apparatus using the same

A reflection optical system placed between a light valve 5 and a screen 4, wherein curved surfaces are only three reflection surfaces of first to third mirrors 1 to 3, and satisfies the following: (1) θL<20 degrees, (2) 25 degrees<θUL<55 degrees, (3) 20 degrees<θM1<55 degrees, (4) 15 degrees<θM2<50 degrees, (5) 8 degrees<θM3<30 degrees, (6) θL<15 degrees, (7) 30 degrees<θUL and (8) 7.5 degrees<|θF|, where θL: minimum angle which a light beam of pupil center forms with respect to the enlargement side image surface; θUL: difference between maximum and minimum angles which a light beam of pupil center forms with respect to the enlargement side image surface; θM1, θM2 and θM3: deviation angles of the light beam of pupil center passing the center of the reduction-side image surface in first to third mirrors 1 to 3; and θF: reduction-side pupil divergent angle.
Owner:FUJIFILM CORP

Means for Controlling the Progression of Myopia

A contact lens (10) for use in controlling or retarding the progression of myopia in an eye has a central optical zone (20) approximating the normal diameter of the pupil of the eye (22) that gives clear central vision at distance for the wearer. An annular peripheral optical zone 24 that is substantially outside the diameter of the pupil is formed around the central optical zone (20) with greater refractive power than that of the central zone (22) so that oblique rays entering the eye through the peripheral optical zone (24) will be brought to focus at a focal plane that is substantially on or anterior to the peripheral region of the retina. Preferably, the rear surface (16) of the lens is shaped to conform to the cornea of the eye and the front surface (18) of the lens (10) is shaped to provide—in conjunction with the rear surface (16)—the desired optical properties of the central and peripheral optical zones. The front surface (18) is also preferably contoured to form a smooth transition (30) between the junction of the central optical zone (20) and the peripheral optical zone (24), with or without designed optical properties such as progressive power.
Owner:THE VISION CRC LTD

Optical system and image projection apparatus including the same

ActiveUS20140192419A1Less distortionLess lateral chromatic aberrationLensPhysicsAbbe number
In an optical system including a front lens unit having negative refractive power, a stop, and a rear lens unit having positive refractive power in order from an enlargement side to a reduction side, the front lens unit has a combination lens in which a negative lens and a positive lens are adjacently arranged in order from the enlargement side to the reduction side, and a focal length of the negative lens fN, an Abbe number νN and relative partial dispersion θN of a material of the negative lens, an Abbe number νP and relative partial dispersion θP of a material of the positive lens, and a focal length of the entire optical system fW are appropriately set.
Owner:CANON KK

Sharpness metric for vision quality

InactiveUS20060197911A1Remove wave aberrationSubjective blurRefractometersSkiascopesPoint spread functionQuality of vision
A vision metric, called the sharpness metric, indicates the subjective sharpness of a patient's vision by taking into account both the wavefront aberration and the retinal response to the image. A retinal image quality function such as the point spread function is convolved by a neural quality function, and the maximum of the convolution over the retinal plane provides the sharpness metric. The sharpness metric can be used to control eye surgery or the fabrication of a lens.
Owner:UNIVERSITY OF ROCHESTER

Optical system for a laser therapy instrument

An optical system for a laser therapy instrument for the application of laser radiation on and in the eye, includes a femtosecond laser, an objective. The objective or at least one lens or lens group of the objective is shiftable in the direction of the optical axis being intended for shifting of the focus position from the region of the cornea to the region of the crystalline lens and vice versa. The optical system may include at least two optical assemblies designed for the axial variation of the focus of the therapeutic laser radiation, with the focus variation range Δz differing between the individual assemblies and a changing device, designed for the insertion of any one of these assemblies into the therapeutic laser beam path at a time.
Owner:CARL ZEISS MEDITEC AG

Optical Imaging Assembly

An optical imaging module used in portable devices is described. In order from an object side to an image side, the module comprises an aperture stop, a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a second lens element with negative refractive power having a concave image-side surface and a object-side surface being convex in a peripheral region; a third lens element with refractive power; a fourth lens element with refractive power having a convex image-side surface; a fifth lens element with positive refractive power having an image-side surface being concave in a paraxial region and convex in a peripheral region; and wherein the optical imaging module used in the portable devices satisfies: 0.052 mm≦D≦0.082 mm, where D represents a maximum effective focus shifts range under all the defocus curves at 0.4 modulus of the OTF (optical transfer function).
Owner:VISTA OPTRONICS

Wearable display apparatus having a light guide element that guides light from a display element and light from an outside

Provided are a wearable display device and a light guide element thereof, the display device including: a display element configured to project a first light forming a virtual image; and a light guide element configured to guide the first light from the display element and a second light input from outside of the wearable display device to a predetermined position. The light guide element includes: a first optical surface facing the display element; a second optical surface and a third optical surface configured to reflect the first light input through the first optical surface; and a fourth optical surface configured to reflect the reflected first light to the predetermined position. The first to third optical surfaces are flat surfaces, and the fourth optical surface is a rotationally asymmetric reflective surface.
Owner:SAMSUNG ELECTRONICS CO LTD

Hybrid refractive gradient-index optics for time-of-fly sensors

ActiveUS20210191009A1Less aberrationMirrorsOptical rangefindersTime of flight sensorGradient-index optics
Techniques are described for time-of-fly sensors with hybrid refractive gradient-index optics. Some embodiments are for integration into portable electronic devices with cameras, such as smart phones. For example, a time-of-fly (TOF) imaging subsystem can receive optical information along an optical path at an imaging plane. A hybrid lens can be coupled with the TOF imaging subsystem and disposed in the optical path so that the imaging plane is substantially at a focal plane of the hybrid lens. The hybrid lens can include a less-than-quarter-pitch gradient index (GRIN) lens portion, and a refractive lens portion with a convex optical interface. The portions of the hybrid lens, together, produce a combined focal length that defines the focal plane. The hybrid lens is designed so that the combined focal length is less than a quarter-pitch focal length of the GRIN lens portion and has less spherical aberration than either lens portion.
Owner:SHENZHEN GOODIX TECH CO LTD
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