The invention relates to a hologram, or holographic intensity data, processing method and system. The system implements the method which comprises receiving holographic intensity data comprising at least a holographic intensity pattern or image at a discrete location in a propagation space, the propagation space comprising the three-dimensional space over which light waves or illumination forming the holographic intensity pattern propagates. The method comprises determining one or more data key-points of at least one potential object of interest (19) in the received holographic intensity data, and also comparing the determined one or more data key-points to at least one pre-determined propagation space invariant object descriptor associated with an object to determine a match in order to identify or detect the object and determine its location in the propagation space.

Hologram processing method and system

Provided herein are systems and methods for simultaneous imaging and stimulation using a microscope system. The microscope system can have a relatively small size compared to an average microscope system. The microscope can comprise in part an imaging light source and a stimulation light source. Light from the imaging light source and the stimulation light source can be spectrally separated to reduce cross talk between the stimulation light and the imaging light.

Systems and methods for optogenetic imaging

The invention discloses a three-dimensional space imaging interaction method and a three-dimensional space imaging interaction based on ultrasonic wave. The three-dimensional space imaging interaction method is different from an existing holographic imaging technology. The method comprises the following steps: firstly establishing the three-dimensional coordinates of a space to generate a target three-dimensional space, and emitting ultrasound microbubbles capable of sensing with an ultrasonic wave field; then, forming the ultrasonic wave field in the target three-dimensional space through the ultrasonic wave, generating a potential well position in the target three-dimensional space, controlling the ultrasound microbubbles to move in the target three-dimensional space and to be stabilized at the position, simultaneously coloring the ultrasound microbubbles by adjusting laser, and thus forming a three-dimensional image in the target three-dimensional space. Furthermore, the three-dimensional images are converted into 3D pictures and the 3D pictures are shown for a user by continuously repeating the steps. Through the 3D pictures shown for the user in the method and the system, the user can be interactive with the 3D pictures, so that the user can feel the real touch of the 3D pictures in the interaction process, and the original structures of the three-dimensional images can also be maintained.

Three-dimensional space imaging interaction method and three-dimensional space imaging interaction based on ultrasonic wave

The invention relates to a digital holographic measurement technology of a particle field and aims to provide a compact digital holographic apparatus and method of a particle field. The apparatus comprises a laser source and a spatial filter, a collimating beam expander, a beam splitter and a first half transparent and half reflecting mirror which are sequentially arranged along the transmitting direction of the laser source, wherein the beam splitter, an attenuator and a second half transparent and half reflecting mirror are sequentially arranged in the direction vertical to the transmitting direction of the laser source; a totally reflecting mirror, the second half transparent and half reflecting mirror, an imaging lens and a CCD (charge coupled device) detector are sequentially arranged in the direction opposite to the transmitting direction of the laser source; the totally reflecting mirror corresponds to the first half transparent and half reflecting mirror; and the CCD detector is connected to a computer through a signal wire. The apparatus can conveniently control the recording plane of a hologram, and particularly can ensure the recording plane to be at the right side of the first half transparent and half reflecting mirror. The laser transmitting and CCD receiving can be arranged at the same side, so that a digital holographic system is compact and portable.

Compact digital holographic apparatus and method of particle field

The invention discloses a device and method for measuring granularity of dynamic light scattering nano particles of an image The device comprises a laser source, a sample pool, a lens and a surface array photosensitive device which are coaxially arranged from left to right The method comprises the steps: incident laser of a laser beam irradiates particles in the sample pool, the particles making a Brownian movement in the sample pool generate dynamic light scattering under the irradiation of the incident laser, dynamic light scattering signals of the particles are shot by a surface array digital camera configured on the focus surface of the lens after passing through the lens, and the exposure time of the camera is controlled so that scattering spots of the particles form a tracking line on a shot image, and granularity and distribution of the particles are obtained after data processing is carried out The invention has the advantages that the scattering light dynamic signals of the particles are simultaneously measured by using the surface array digital camera and are processed to obtain the granularity and the distribution of the particles, the measurement time is short and the particles with a granularity range from nanometer to micrometer can be simultaneously measured

Device and method for measuring granularity of dynamic light scattering nano particles of image

The invention relates to gas-phase and solid-phase flow particle online kinetic characteristic analysis technology, aiming at providing a method and a device which are used for the online measurement of intraductal gas-phase and solid-phase flow particle two-dimensional velocity field and particle size distribution. The device comprises a laser which is a low-power continuous laser of an emittingsheet laser; the laser is movably arranged on a guideway surrounding a pipeline to be measured, the plane of the guideway is vertical to the axial lead of the pipeline to be measured; a CCD camera isalso movably arranged on the guideway, with the lens direction vertical to the direction of the plane of the sheet laser; and the measured position of the pipeline is installed with a transparent glass window. The technology has low cost, compact measuring system and strong field operability, and can carry out online real-time measurement on particle field two-dimensional speed, particle size distribution and particle concentration to different sectional flow fields in the pipeline.

Method and apparatus for on-line measuring two-dimension speed and particle size distribution of granules in pipe

The invention relates to technology for simultaneously measuring multi-phase flow particles online through multi-parameter, and aims to provide a method and a device for simultaneously measuring droplet positions, particle sizes and a complex refractive index. The method comprises the following steps of: (1) dividing a highly coherent continuous laser beam into two beams after spatial filtering and collimating beam expansion, wherein one beam radiates particles in a detected flow field region, and the other beam is used as a reference beam; (2) mixing scattered light of a lateral 30-degree to90-degree region of particles in the detected flow field region and the attenuated reference beam to perform interference so as to form a hologram, storing the hologram in a computer after being recorded by a digital camera through an imaging device; (3) acquiring a series of reconstructed images of the detected particles along the depth direction by utilizing digital reconstruction technology; and (4) identifying the reflective spot and the refractive spot of the particles from the reconstructed images by utilizing digital image processing technology so as to acquire space coordinates and scattered light intensity ratios. Compared with rainbow measurement technology, the measurement method has the advantages that: a light path system of the measurement device is relatively simple and is easy to implement.

Method and device for simultaneously measuring droplet position, particle sizes and complex refractive index

The invention relates to a digital holographic technique, and aims to provide a pipeline powdered coal particle size measuring device and a measuring method. The method comprises the following steps: sampling a gas in a powdered coal conveying pipeline by a sampling nozzle, mixing clean air with the sampled gas to form a mixed gas, and taking the mixed gas as a sample to be delivered into a diluting chamber; combining a laser with a spatial filter to generate collimated laser, and projecting the collimated laser to a CCD camera by virtue of a laser channel of the diluting chamber; and processing a holographic image acquired by the CCD camera to obtain concentration and particle size distribution information of the measured sample, and then obtaining concentration and particle size distribution data of the powdered coal in the sampled gas according to a dilution ratio of the measured sample. By use of the device and the method provided by the invention, online quantitative measurement on the particle size and the concentration of the powdered coal in a pipeline can be achieved at the same time. The device is easy to operate and has a relatively high automation degree, and the measurement process does not need artificial interference; and by virtue of computer calculation, a measurement result close to reality can be given, manpower and material resources are saved, and daily running monitoring and maintenance work of coal-fired boiler equipment are facilitated.

Pipeline powdered coal particle size measuring device and measuring method

The utility model relates to the particle field digital holographic measurement technology and aims at providing a particle field compact digital holographic apparatus. The apparatus comprises a laser light source, and a spatial filter, a collimating beam expander, a beam splitter and a first semi-passing semi-reflecting lens sequentially arranged along the emission direction of the laser light source, wherein in the direction vertical to the emission direction of the laser light source, the beam splitter, an attenuator and a second semi-passing semi-reflecting lens are sequentially arranged; in the direction opposite to the emission direction of the laser light source, a totally reflecting mirror, the second semi-passing semi-reflecting lens, an imaging lens and a CCD (Charge Coupled Device) detector are sequentially arranged; the totally reflecting mirror corresponds to the first semi-passing semi-reflecting lens; and the CCD detector is connected to a computer through a signal wire. The apparatus can control the recording plane of a hologram conveniently, and especially can ensure the recording plane to be at the right side of the first semi-passing semi-reflecting lens; and the laser emission and the CCD reception can be arranged at the same side so as to enable a digital holographic system to be compact and portable.

Cen Kefa

Papers

Method and apparatus for on-line measuring two-dimension speed and particle size distribution of granules in pipe

Method and device for simultaneously measuring droplet position, particle sizes and complex refractive index

Compact digital holographic apparatus and method of particle field

Pipeline powdered coal particle size measuring device and measuring method

Particle field compact digital holographic apparatus