63results about How to "Achieving Absolute Measurements" patented technology

The invention belongs to the technical field of microscopicspectral imaging detection, and relates to a split pupil laser differential confocal Raman spectrum test method and device. According to the test method and device, a split pupil laser differential confocal microtechnique and a laser Raman spectrum detection technique are organically combined, precise imaging of three-dimensional geometrical positions is realized through segmentation focal spot differential detection, the optical path structure of a traditional differential confocal microscopic system is simplified, advantages of an original laser differential confocal system and a split pupil confocal system are inherited, and multi-mode switching and processing of split pupil laser differential confocal microscopic detection, laser confocal Raman spectrum detection and laser differential confocal Raman spectrum detection can be realized only through softwareswitching processing. The test method and device provide a new technological approach for detection ofnanoscale microcell three-dimensional geometrical positions and spectrum, can be applied to fields of biomedicine, industrial precision detection and the like, and has the broad application prospect.

The invention belongs to the technical field of surface fine structure measurement, and relates to a differential confocal scanning detection method with high spatial resolution. This method adopts differential confocal microscope double-accepting optical path arrangement and double detector subtraction to form differential confocal signals, and measures the workpiece to be measured. The lateral resolution is improved through optical super-resolution confocal The method improves the vertical resolution, so as to achieve the high spatial resolution detection of differential confocal scanning detection. This method can meet the requirements of high spatial resolution, high precision and large measurement range, and is especially suitable for the measurement of surface three-dimensional microstructure, microsteps, microgrooves, line width and surface topography.

The invention discloses a method for measuring a high energy laser energy parameter based on a light pressure principle and an apparatus thereof. The method comprises the following steps: a reflector and a deformation rod are arranged on a high energy laser incidence optical path, a plurality of displacement sensors are provided at a back side of a reflector laser incidence direction, micrometricdisplacement of the reflector caused by light pressure in a laser light extraction process is measured in real time, a light pressure value generated by laser is solved, and parameters of the laser such as average power, energy, P-t curve, light spot center of mass change and the like are calculated. According to the method and the apparatus in the invention, light beam is not blocked in usage, an on-line measurement of undistributed transmission of high energy laser is realized, cost-effectiveness of an experiment is raised, simultaneously, a measurement system does not need to bear strong laser irradiation, and the method and the apparatus can be used for high power laser parameter measurement.

The invention provides a measuring instrument with an optical fiber Mach-Zehnder interferometer and optical fiber Michdson interferometer arrays, which comprises a broad-band light source 1, a photoelectric detector 2, a 3dB optical fiber 2 multiplied by 2 coupler 3, the optical fiber Mach-Zehnder interferometer, a transposed 3dB optical fiber 2 multiplied by 2 coupler 7, optical fiber Michdson interferometers arrays 8 and 8', and a single-mode connecting optical fiber 9, wherein, the optical fiber Mach-Zehnder interferometer consists of an attenuator 4, a self-focusing lens 5, an axicon lens6 with total reflection angle, and the connecting optical fiber 9. The measuring instrument with the optical fiber Mach-Zehnder interferometer and the optical fiber Michdson interferometer arrays utilizes a technique that measures strain and temperature at the same time, realizes the temperature compensation technique and the array arrangement of optical fiber sensors, realizes absolute measurement under the situation that the multiple sensors are not interfered by each other, lowers the cost of single-point measurement and ensures real-time measurement; furthermore, the measuring instrument has simple techniques and easy implementation, and as standard optical fiber communication elements are adopted as the optical fiber materials and devices, the measuring instrument has low cost, easy acquisition of the optical fiber materials and devices and easy popularization.