Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

114 results about "Newton's rings" patented technology

Newton's rings is a phenomenon in which an interference pattern is created by the reflection of light between two surfaces—a spherical surface and an adjacent touching flat surface. It is named after Isaac Newton, who investigated the effect in his 1704 treatise Opticks. When viewed with monochromatic light, Newton's rings appear as a series of concentric, alternating bright and dark rings centered at the point of contact between the two surfaces. When viewed with white light, it forms a concentric ring pattern of rainbow colors, because the different wavelengths of light interfere at different thicknesses of the air layer between the surfaces.

Intelligent wheelchair control and route optimization method based on visual evoked brain-computer interface

The invention discloses an intelligent wheelchair control and route optimization method based a on visual evoked brain-computer interface. The method comprises the following steps: presenting a Newton's ring to a user who sits on a wheelchair as a motion stimulating unit; acquiring and processing electroencephalogram signals of the user; recognizing out a stimulating target which is currently gazed at by virtue of a computer; indicating out the target which is gazed at by virtue of a computer screen, and transmitting a target result, which is recognized out, to an intelligent wheelchair motorcontroller so as to control the motion of a motor, so that the wheelchair is advanced; when the wheelchair, which adopts a mode of firstly rotating in situ and advancing straightly, moves straightly or is free from continuous turning in a same direction, not adjusting the rotating angle of the wheelchair, when the wheelchair, which is controlled by a user, is subjected to a continuous turning operation in a same direction, pre-judging whether the wheelchair is further to be turned in a same direction by the user, and compensating the rotating angle of the wheelchair by virtue of a curve-fitting method and shortening an advancing distance. According to the method provided by the invention, the number of target stimulation is reduced, and an advancing process of the wheelchair in continuousturning in the same direction is optimized.
Owner:XI AN JIAOTONG UNIV

Liquid-crystal display with touch function and preparation method thereof

The invention relates to a liquid-crystal display with a touch function and a preparation method thereof. The liquid-crystal display with the touch function comprises a first substrate and a second substrate, wherein the first substrate and the second substrate are oppositely packaged together and clamp a liquid crystal therebetween; the external surface of the first substrate is provided with a first polaroid, and the external surface of the second substrate is provided with a second polaroid with an integral structure and a touch structure layer for determining a position coordinate of a touch point. The invention not only causes the liquid crystal display to directly realize the touch function, but also realizes zero-distance combination of no gap between the touch structure and a liquid crystal panel through integrating the touch structure layer for determining the position coordinate of the touch point on the second substrate, thereby the technical defects of entering ashes and entering aqueous vapor of a conventional touch screen are completely overcome, and the technical defect of reducing display quality due to a Newton's ring generated by the conventional touch screen can be effectively avoided. Besides, the invention has the advantages of small thickness, light weight, material cost reduction, process step reduction, production time shortening and the like.
Owner:ZTE CORP

Method for measuring elasticity modulus of optical flat glass by using optical interference method

The invention discloses a method for measuring the elasticity modulus of optical flat glass by using an optical interference method. The method is specifically executed according to the following steps of (1) applying stress to the optical flat glass through a screw, displaying the stress measured by a stress sensor through a measurement instrument and recording the magnitude of the stress; (2) keeping the stress in the step (1) invariable, reading the diameter Q of a black spot at the center of a newton ring interference image under the stress through a reading microscope and then calculating the radius r of the black spot; (3) changing the value of the stress through the screw and repeating the steps (1) and (2) to obtain different stresses of the optical flat glass and corresponding diameters Q and radiuses r of the black spot at the center of the newton ring interference image under different stress conditions; and (4) calculating the elasticity modulus E of the optical flat glass. The measurement method is simple, the measurement period of the method is shortened in comparison with that of a traditional method, the measurement application range is expanded; and a lot of material losses are avoided, the measurement repeatability is good and the method can be used for measuring the optical flat glass of a small sample.
Owner:XIAN UNIV OF SCI & TECH

LCD (Liquid Crystal Display) touch-controlled all-in-one machine and manufacturing method thereof

The invention relates to an LCD (Liquid Crystal Display) touch-controlled all-in-one machine which comprises a liquid crystal box, an upper polarizer and a lower polarizer, wherein a touch screen induction electrode is arranged on the upper surface of the liquid crystal box, the upper polarizer is arranged on the upper surface of the touch screen induction electrode, the liquid crystal box is internally provided with a first LCD electrode an a second LCD electrode, and the lower polarizer is arranged on the lower surface of the liquid crystal box. A manufacturing method of the LCD touch-controlled all-in-one machine comprises 11 steps. An additional touch screen is saved in the LCD display touch-controlled all-in-one machine, so that the cost is greatly reduced, the thickness of the entire LCD display touch-controlled all-in-one machine is reduced by 1.3mm at the same time, and meanwhile, the phenomenon of Newton 's rings caused by design defects or assembling defects of the touch screen can be effectively avoided. A layer of glass is eliminated, so that LCD display touch-controlled all-in-one machine can also solve the problem of the light transmittance loss, and avoid the brightness loss without enhancing the backlight brightness so as to well save the electric energy. An IC (Integrated Circuit) is not required to be controlled by a special SCT (Surface Charge Transistor) and keying signals can be directly read by a single chip microcomputer, so that the instable situations caused by compatibility can be avoided.
Owner:汕头市锐科高新科技股份有限公司

Preparing method of electronic control Fresnel lens and based on Newton ring interference holographic record

The invention relates to a preparing method of an electronic control Fresnel lens and based on Newton ring interference holographic record. According to the preparing method, light emitted by a laser device enters a Newton ring interference device after passing through a laser beam expander and permeating a beam splitter, light reflected by the upper surface and the lower surface of an air layer in the Newton ring interference device is interfered to form annular stripes, namely Newton rings, alternate with brightness and darkness, the Fresnel lens is then obtained after the annular interference stripes are reflected through the beam splitter and exposure is carried out on a polymer dispersed liquid crystal box, and the whole preparing process is a process of recording the Newton rings with the holographic method. According to the preparing method of the electronic control Fresnel lens and based on the Newton ring interference holographic record, the manufacturing technology is simple, the mask manufacturing process and the complicated photoetching process are avoided, manufacturing time is greatly shortened, and the efficiency of scientific researches and experiments is improved; the radius of a first dark ring of the Newton rings is controlled by adjusting a screw on the Newton ring interference device, and therefore polymer dispersed liquid crystal Fresnel lenses with different focal lengths can be manufactured; the optical diffraction characteristic of the Fresnel lens can be controlled by applying of external electric fields.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products