6 results about "Refraction" patented technology

The invention discloses a pump-probe method based on Z-scan. A laser beam is divided into two beams; pumping light is focused on samples to be measured through time delay, so that a non-linear sample generates nonlinear absorption and nonlinear refraction; emergent probe light is divided into two beams through a spectroscope, wherein one beam directly enters a first probe, and the other beam enters a second probe after passing through a diaphragm of small pore diameter with a center coinciding with an optic axis. The pump-probe method is characterized in that phase objects are arranged in the front of a convex lens in a probe light path; the method for measuring the light comprises the following steps: (1) the samples to be measured are put in place, and the energy of the probe light at different times is collected by two probes respectively; (2) a energy curve of the probe light at different delay times is processed, so as to obtain optical nonlinear parameters. A measuring system working according to the method has the advantages that the light path is simple; the data treatment is simple; nonlinear absorption and refraction can be measured simultaneously without the need of separate measurement, and the size and the symbol of the nonlinear refraction can be measured simultaneously; the measuring results are accurate, etc.

A polyester fiber which has physical properties such as a double refraction delta n of up to 0.07, an elongation after fracture of at least 80%, and a specific weight of at least 1.35 g/cm<3> and is suitable for a draw-texturing raw yarn, and which is produced by cooling polyester filaments melt-spun from spinnerets to up to a glass transition temperature by a cooling air while filaments are being taken up by a take-up roller at at least 3000 m/min, and by heating them to above a glass transition temperature while they are being wound up from the take-up roller into a package by a winding device.

The invention discloses a method for deducting background of a spectrograph and a device of the method. The method comprises the following steps: exciting a target element atomization area via a target element light source, sampling the excited target element atomization area to obtain a superposed signal of a light source signal of a target element in the target element atomization area and a light source signal of a background element, and recording the superposed signal as first data; exciting the target element atomization area via a background deduction light source, sampling the excited target element atomization area to obtain a light source signal of the background element in the target element atomization area, and recording the light source signal as second data; calculating according to the first data and the second data to obtain a light source signal of the target element, and deducting the background. The method replaces a conventional process of enabling the tested element to generate corresponding hydride through a hydride generation method, can effectively eliminate light refraction interference in the atomization process, and has high applicability.

The invention provides a liquid crystal lens device, comprising a first substrate, multiple first primary electrodes, multiple first auxiliary electrodes, a first alignment layer, a second substrate, multiple second primary electrodes, multiple second auxiliary electrodes, a second alignment layer, a liquid crystal layer, and a voltage supply unit. According to the invention, the voltage supply unit can be used to supply different drive voltages to the multiple first primary electrodes, the multiple first auxiliary electrode, the multiple second primary electrodes, and the multiple second auxiliary electrodes, thereby enabling the liquid crystal layer to change the axial direction and the refraction rate according to the different drive voltages. Therefore, view angle ranges with good 3D visual effects can be selected by a 3D screen according to the positions of users.

The invention discloses a 360 DEC G 3D object-surrounding interactive device, which comprises a fixed seat, a rotary wood seat, a rotary table, a projecting device, a 3D sensing controller, a magnifier simulation device and a computer. The rotary wood seat is arranged in the fixed seat and buckled through a turntable; the rotary wood seat is provided with a rotary position sensor for sensing an angle of rotation and judging the angle to be rotated synchronously of a 3D object-surrounding image displayed by an object display device through computation of the computer; the rotary table is buckled on the rotary wood seat and provided with a refraction mirror, a projecting panel and a 3D sensing transmitter; the 3D sensing transmitter computes partial image to be magnified or reduced of a display panel of the magnifier simulation device through the computer by sensing a current distance between the coordinates of the magnifier simulation device and the object display device in coordinationwith a 3D sensing receiver arranged on the magnifier simulation device so as to magnify the partial image by simulating the function of the magnifier.