6 results about "Kinoform" patented technology

The invention provides a non-centrosymmetric material interface state spatial distribution detection method and system, and the method comprises the steps: carrying out the light splitting of a preset laser pulse, and forming reference light and incident light; adjusting the focus action position of the incident light to enable the focus of the incident light to act on the interface area of the sample; constructing a kinoform, and modulating the incident light according to the kinoform; irradiating the interface of the sample by using the modulated incident light to obtain reflected light; judging whether the light intensity of the beam combining light meets a convergence condition; if not, carrying out iterative optimization on the kinoform; if yes, taking the current kinoform as a target kinoform; and determining interface state space distribution information of the sample according to the target kinoform. According to the invention, the distinguishing of the body signal and the interface signal of the non-centrosymmetric material is realized through Z-axis scanning and quantitative coherent detection, the dynamic compensation of the wavefront distortion of the incident light is realized based on the iteration of the kinoform, and the interface electronic state space distribution information of the sample can be obtained through the inversion of the wavefront distortion.

The invention provides a method and system for detecting interface state spatial distribution of a centrosymmetric material, and the method comprises the steps: carrying out the light splitting of a preset laser pulse, and forming reference light and incident light; constructing a kinoform, and modulating the incident light according to the kinoform; irradiating the interface of the sample by using the modulated incident light to obtain reflected light; collecting light intensity after the reflected light and the reference light are coherent, and judging whether the light intensity meets a convergence condition or not; under the condition that the light intensity does not meet the convergence condition, performing iterative optimization on the kinoform; under the condition that the light intensity meets a convergence condition, taking the current kinoform as a target kinoform; and determining interface state space distribution information of the sample according to the target kinoform. According to the invention, the dynamic compensation of the wavefront distortion of the incident light is realized based on the iteration of the kinoform, the method is not only used for improving the quality of coherent light signals, but also used as a quantitative basis for reflecting the wavefront modulation amount of the sample interface, and the interface electronic state space distribution information of the sample can be obtained through the inversion of the method.

A holographic projector includes a display device arranged to form a holographic wavefront by spatially modulating light in accordance with a hologram of a picture. The holographic projector includes a magnification system including a first and second lens. The first lens is arranged form a holographic reconstruction of the picture by focusing the holographic wavefront towards a front focal plane of the first lens. The holographic reconstruction of the picture includes a plurality of pixels. The holographic projector includes a kinoform disposed between the first and second lens and arranged to apply a phase-delay to each pixel of the holographic reconstruction. The holographic projector includes a movement assembly arranged to move the kinoform such that a plurality of different phase-delays are applied to each pixel. The kinoform includes an array of zones and is arranged such that the width of each zone is substantially equal to the distance between adjacent pixels.

A (phase-delay) kinoform (2200), arranged for rotation (centred at 2210), divided into a plurality of concentric zones (2220, 2230), each concentric zone sub-divided into a plurality of phase-delay ar

The application discloses a system and method for generating stable interference fringes by using a pure phase reflective liquid crystal spatial light modulator, and the system comprises a light source module, a laser collimation filtering and beam expanding module, a pure phase reflective liquid crystal spatial light modulator (SLM) control module and a CCD image acquisition module. The system can generate stable double-hole light spots by loading a gray-scale gradual phase grating on the SLM, replaces the method for generating double-hole light spots by using a photoetching mask in a traditional physical optical interference experiment, and can achieve the final result without the aid of other devices, and is simple and convenient to operate. In addition, compared with traditional interference systems such as a Talbot-Green system and a Mach-Zehnder system, the output interference fringes will not vibrate, and the calculation of the post-stripe movement amount is not affected, and the system has the characteristics of stable operation, flexible control and accurate calculation.

The invention belongs to the technical field of micro-nano, and particularly relates to a high-resolution Kinform combined zone plate lens and a design method thereof. The lens provided by the invention is formed by coaxially combining an inner-ring Kinoform flat plate zone plate area and an outer-ring rectangular multiple periodic zone plate area; wherein the inner ring area close to the center of the lens is composed of a Kinforming wave zone plate of a continuous parabola side wall, and the inner diameter and the outer diameter of each stage of wave zone meet the periodic relation of the Fresnel wave zone plate; the wave zone height is continuously changed in the radial direction to form refractive phase delay, so that the focusing efficiency close to the theoretical limit is realized in the + 1-level diffraction direction; a wave zone structure with a rectangular section is adopted in an outer ring area from two thirds of the radius to the outside, and on the premise that the radial period relation is kept, multiple period selection is conducted on wave zones, one or more effective wave zones are reserved every other effective wave zone, the other wave zones are emptied, and the outer ring wave zone equivalently works at a high diffraction order; the design can obtain an effective resolution equivalent to the original outermost ring width.