66 results about "Spherical power" patented technology

A method for manufacturing a spectacle lens includes the steps of providing an integral main lens. The integral main lens has a front surface and a back surface and is at least one selected from a group consisting of a spherical power lens, an astigmatic power lens, and a lens having a main curvature of the front surface in a first meridian and a main curvature of the back surface in the first meridian which are different so as to provide for a spherical power different from zero; and applying at least one additional lens element to at least a part of the front surface and/or at least a part of the back surface, wherein the at least one additional lens element includes at least one layer having a multitude of layer elements, in particular printed layer elements. Further, the invention is directed to a corresponding spectacle lens.

Optical devices, systems, and methods can produce and/or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid/fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).

Provided is an optometer capable of recording an examination result without making an error even in a case of using an apparatus with a structure to mechanically display the examination result. The optometer includes a phoropter (120), an imaging device (2) for taking an image of the phoropter (120), the image including a display portion of the phoropter (120), a display position specifying portion (135b) for analyzing the taken image and specifying a position of the display portion in the taken image, a display content acquisition portion (135c) for acquiring display contents (examination results) of the display portion whose position is specified, and a display control portion (135d) for displaying the acquired examination results on a monitor portion (131). The display portion includes a PD display portion (122), a spherical power display portion (161), a spherical power display portion (162), a cylindrical axis display portion (164), and a rotary prism portion (155).

Embodiments of the present invention relate to a multifocal lens having a mostly spherical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.

The invention relates to a preparation method of oxide or meta-coated nickel ultrafine powder. The preparation method is characterized by comprising the following steps of: (1) respectively adding water-soluble nickel salt and precipitator into deionized water, so that two solutions can be obtained; (2) respectively adding dispersing agent into the two solutions; (3) mixing the two solutions; (4) respectively adding another water-soluble metal salt and precipitator into deionized water, so that two solutions can be obtained; (5) simultaneously adding the obtained two solutions into single-precursor solution; (6) carrying out solid-liquid separation, and drying, so that a salt-coated precursor can be prepared; and (7) heating to 500-1200DEG C, keeping the temperature for 0.5-5h, cooling along with a boiler, and cooling to the room temperature, so that the coated power can be obtained. The ultrafine coated power prepared by the method is approximately spherical in appearance, has the average grain diameters of 200-500nm, and is high in crystallinity; and the prepared spherical power is free of glomeration, good in dispersity, and high in oxidation resistance.

An ophthalmic measurement apparatus capable of outputting correction data (objective values) for a patient's eye as approximate as possible to subjective values includes an optical system for projecting a measurement target onto a fundus and detecting an image of the target reflected therefrom using a photoelectric element so as to obtain measurement data on eye refractive power distribution or wavefront aberration, an optical system for photographing an anterior-segment including a pupil using an image-pickup element, a device which detects a size of a pupil area by image processing, and a device which obtains a spherical power, an astigmatic power, and an astigmatic axial angle based on the data within a given area smaller than the pupil area when the detected size is larger than a reference size, and obtains the three values based on the data within the pupil area when the detected size is smaller than the reference size.

An anamorphic objective lens comprising, along an optical axis and in order from an object space to an image space: at least a negative (−) first spherical power lens group; an anamorphic lens group and a positive (+) second spherical lens group wherein an aperture stop is located before, after or preferably within the spherical power second lens group. Both spherical lens groups contain spherical refractive optical surfaces and the anamorphic lens group contains cylindrical and plano optical surfaces with at least one cylindrical surface oriented at substantially 90 degrees about at least one other cylindrical surface. The negative first spherical power lens group may provide focusing.

A system and method for assessing optical corrective needs of a patient. The system includes a computer system including a processor adapted to run at least a refractive software application thereon, an input device in communication with said processor and adapted to receive input from a user, and a displace device in communication with said processor and adapted to display information, and refractive eyewear including electrically adjustable left and right lenses selectively controllable to adjust at least a sphere power of the respective lenses and in communication with the processor. The refractive software application receives input from the input device and the eyewear controller, and selectively adjusts the sphere power of the left and right lenses, controls information displayed on said display device, and stores information regarding the sphere power of the respective left and right lenses.

The invention provides a simple synthetic method for Ag2S-MoS2 sheet self-assembling composite spherical power and relates to the technical field of photocatalytic material preparation. The method comprises the following steps: dissolving amino acid, ammonium molybdate tetrahydrate, thiourea, silver nitrate and ammonium metavanadate in water and uniformly stirring and mixing; transferring the stirred mixed solution into a reaction kettle; covering the reaction kettle and placing into a constant-temperature airing oven for reacting; treating after ending the reaction, thereby acquiring black Ag2S-MoS2 sheet self-assembling composite spherical power. According to the invention, an amino acid auxiliary hydrothermal method is adopted for successfully acquiring the Ag2S-MoS2 sheet self-assembling composite spherical power; a series of experimental results prove that different amino acids as the templates and raw materials can be used for successfully preparing the Ag2S-MoS2 sheet self-assembling composite spherical power; the Ag2S-MoS2 sheet self-assembling composite spherical power has the characteristics of narrow size distribution, uniform morphological distribution, controllable grain size, and the like.

The invention relates to an M50-Sn-Ag-Cu microporous flowing channel self-lubricating composite material. The M50-Sn-Ag-Cu microporous flowing channel self-lubricating composite material is characterized in that aerial main shaft bearing material M50 steel is used as a base material; Sn-Ag-Cu is used as lubricating phases, and the lubricating phases are arranged to form a microporous flowing channel; the microporous flowing channel structure enables the lubricating through the lubricating phase. The M50-Sn-Ag-Cu microporous flowing channel self-lubricating composite material is prepared through Sn-Ag-Cu spherical powder and M50 spherical power by 3D printing. The M50-Sn-Ag-Cu microporous flowing channel self-lubricating composite material is low in friction coefficient and abrasion rate; the friction performance of an M50 bearing steel can be effectively improved; in addition, the preparation method is simple and convenient; the technical parameters in the preparation process are easily controlled; the lubricating action can be controlled in some extent; complex mechanical spare parts can be manufactured; and the M50-Sn-Ag-Cu microporous flowing channel self-lubricating composite material is of an important significance in industrialization application of a lubricating material.

The invention discloses a production method for high cold-pressing formability water atomized pre-alloyed powder. The production method comprises the following step (1) of preparing 400-mesh semi-finished pre-alloyed powder; the step (2) of controlling the moisture content of the semi-finished pre-alloyed powder to be 1 wt%-2 wt% and the oxygen content to be 0.6 wt%-0.8 wt%, and then drying in a vacuum drying oven at 100 DEG C for 90 min-120 min, so that powder particles are bonded preliminarily; and the step (3) of crushing the powder particles bonded preliminarily after reduction and annealing, and screening the crushed particles. Through the production method, quasi-spherical power is changed into the powder of more complicated shapes, such as rice panicle, grape and satellite, and thecold-pressing formability of the pre-alloyed powder is improved greatly; according to the production method, only simple surface modification of the powder is performed, and other performances are notchanged; and the production method is extremely high in applicability.

The invention relates to an intraocular lens diopter calculation system based on machine learning. The intraocular lens diopter calculation system comprises a prediction model, an input module, a calculation module, an additional module and an output module. The calculation module is used for acquiring a diopter number of an intraocular lens to be implanted (IOL) by taking target equivalent spherical power as an ideal value and taking preoperative information of a cataract patient as input on the basis of a prediction model; the additional module is used for providing a plurality of differentsimulated intraocular lens diopters to the calculation module, and the calculation module generates postoperative optometry equivalent spherical lenses corresponding to the different simulated intraocular lens diopters. The artificial intelligence active learning data characteristics are fully utilized, the error calculation capacity is autonomously optimized, the diopter of the intraocular lens needing to be implanted in cataract surgery is accurately calculated, eyeball biological parameters of all dimensions are matched, and the eyeball prediction accuracy of the extreme eyeball biologicalparameters is higher.

An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination. The apparatus has a test window through which a presented optotype is seen, a first spherical-power applying unit which applies spherical power to the eye by changing a combination of spherical lenses in the window, a cylindrical-power applying unit which applies cylindrical power to the eye by changing a relative angle of a cylindrical axis of cylindrical lenses in the window, a second spherical-power applying unit including a spherical lens for correction, an instruction unit which instructs examination spherical and cylindrical power, a power-determining unit which determines power applied by the power-applying units so that a difference between the instructed examination power, and resultant spherical and cylindrical power through conversion for a spectacles wearing reference position falls within a predetermined permissible difference, and a control unit which controls driving of the power-applying units.

The invention provides a miniature mating power station for marine observation equipment and belongs to the field of renewable energy sources. The structure is that anchor blocks are connected with the bottom of a heaving block through mooring ropes, so that the power station cannot drift; the heaving block is formed by connecting a support and annular floating bodies, so that the heaving block can be always at the same position below a sea level regardless of a high tide or a low tide; a circular stand column is vertically arranged in the center of the heaving block; the top of the circular stand column is connected with the annular floating bodies by connecting rods; a spherical power generation room is arranged on the circular stand column; a guide pipe is arranged in the center of the spherical power generation room and is sleeved on the circular stand column; two ends of the guide pipe are provided with waterproof sealing rings, so that water cannot enter the spherical power generation room; a guide groove in the power generation room is connected with a guide block on the circular stand column; the guide block also has a function of limiting the power generation room; a rack is arranged on the circular stand column and meshed with a power taking gear in the power generation room; a gear shaft is connected with a generator through a coupler; sea waves push the power generation room to do up-and-down motion, and drive the gear to rotate around the rack so as to drive the generator to generate power; electric energy generated by the generator is stored into a storage battery and changed into voltage matched with marine observation equipment; and the voltage is transmitted to the marine observation equipment through cables. By the miniature mating power station, the demand of China on an ocean observation technology is combined, key technologies are broken through, and off-shore marine observation equipment is stably powered; and the miniature mating power station can effectively promote marine construction of China.

The invention relates to vision compensating spectacles comprising means of support (130, 140, 152) on a wearer's face and at least one optical subassembly (110, 120) mounted on the support means (130, 140, 152) opposite at least one of the wearer's eyes.

The optical subassembly (110, 120) comprises three optical elements mounted on the support means in series along an optical axis: a first optical element of cylindrical power for a direction of gaze of the wearer along the optical axis, a second optical element of cylindrical power for the said direction of gaze and a third optical element of variable spherical power for the said direction of gaze.

The first optical element and the second optical element are adjustable in rotation about the optical axis independently of one another.

The invention discloses a universal applicator, which is a spherical power device driven by electric energy. The inspiration of the universal applicator is mainly from the penetration of a picture of the ultimate and the eight trigrams and the utilization of a gyratory motion effect. The universal applicator mainly comprises a spherical machine case, a spherical rudder, a drive and brake converter, a universal compass, a transfer rotating disk, a rotary swing arm, a motor, an inertial flywheel, an electromagnet, a computer and the like. The universal applicator has the characteristics that kinetic energy generated by a low-power motor can be instantaneously converted into large linear trace driving force to enable the universal applicator to move in a linear trace in an arbitrary direction or can be converted into slow curve trace driving force to enable the universal applicator to move in a curve trace; and navigation in water, land and air can be achieved by transportation means of the power device.

The present invention relates to a two element system for providing an ease of accommodation with variable-spherical aberration control. In one aspect, the present invention provides a two-element ophthalmic lens in which a lateral shift of the elements relative to one another can cause a variation not only in a spherical power provided by the lens but also in spherical aberration exhibited by that lens. In some implementations, the thickness profiles of the two elements are designed such that the variation in spherical aberration is positively correlated with that of the spherical power of the lens.