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374 results about "Optical resolution" patented technology

Optical resolution describes the ability of an imaging system to resolve detail in the object that is being imaged. An imaging system may have many individual components including a lens and recording and display components. Each of these contributes to the optical resolution of the system, as will the environment in which the imaging is done.

Stimulated radiation loss micro imaging system

The invention provides a stimulated radiation loss micro imaging system which comprises an exciting light laser, a first dichroscope, a fluorescent light activating and imaging unit, a loss photoexcitation light, a vector beam modulation unit and a control unit, wherein the fluorescent light activating and imaging unit comprises a second dichroscope, an XY vibrating mirror scanning part, a scanning lens, a cylinder mirror, an objective lens, a probe hole and a photomultiplier tube. The stimulated radiation loss micro imaging system provided by the invention adopts the vector beam modulation unit to modulate the incident loss light laser beam amplitude, a phase and a polarization state, the loss light wave amplitude, the phase and the polarization state of the pupil of an objective lens are utilized to form loss light focal spots, and meanwhile, the loss light focal spots are reshaped in a fine and complicated manner under the action of the multiple physical quantities, so that the generated loss light focal spots are exactly matched with the exciting light focal spot distribution, meanwhile, the diameter of a centre dark region of the loss light focal spots is minimal under the condition of a certain signal-to-noise ratio, and the stimulated radiation loss micro imaging system has high optical resolution.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI

Real-time multi-mode photoacoustic human eye imaging system and imaging method thereof

The invention discloses a real-time multi-mode photoacoustic human eye imaging system and an imaging method thereof. The imaging system comprises a laser device, a front optical path, a reflecting mirror, a focusing lens, a light-transmitting acoustic reflection device, a scanning mirror, a water trough, an ultrasonic probe, an ultrasonic transmitter-receiver set, an amplifier and a computer. A light-transmitting acoustic reflection film and the scanning mirror are placed in the water trough. The imaging system has a photoacoustic imaging mode and an ultrasonic imaging mode. Mechanical scanning is replaced through the scanning mirror, imaging time is greatly shortened, and pain of a patient is relieved. Meanwhile, due to the optical and ultrasonic confocal design, an existing pure optical focusing imaging mode or an existing pure ultrasonic focusing imaging mode is changed, sensitivity is improved on the basis that the optical resolution is achieved, and full-eye imaging from the front of the eye to the bottom of the eye can be carried out. Due to dual-wavelength use, the limitation that imaging is only carried out on the eye vascular structure at present is broken through, functional imaging of the degree of blood oxygen saturation can be carried out, and early detection of a part of eye diseases is facilitated.
Owner:PEKING UNIV

Novel scanning method and novel scanning device of optical resolution photo-acoustic microscope

The invention discloses a novel scanning method and a novel scanning device of an optical resolution photo-acoustic microscope, belonging to the technical field of photo-acoustic imaging. The device disclosed by the invention has the working process and working principle that after being collimated by using a single mold optical fiber coupling component, pulse laser emitted from a laser emitter is input into a two-dimensional scanning galvanometer system; the two-dimensional scanning galvanometer system focuses the laser onto a target object to generate a photo-acoustic signal, and a linear area corresponding to a focusing area of a linear focusing ultrasonic detector is scanned; photo-acoustic signals generated in different scanning positions are transmitted to the linear focusing ultrasonic detector through a water tank full of an ultrasonic coupling liquid, and are converted into piezoelectric signals; after being amplified by using an amplifier, the piezoelectric signals are acquired by using a data acquisition card, and are stored in a computer for data processing. The optical resolution photo-acoustic microscope and the target object do not need to move relative to each other, the requirements of the optical resolution photo-acoustic microscope on a signal to noise ratio can be met, and meanwhile, a large view field range and a high resolution can be met.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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