56results about How to "Large imaging field of view" patented technology

The present invention relates to the technical field of measuring non-metallic inclusions, in particular to a method for measuring non-metallic inclusions in steel, comprising the following steps: (1) sampling; (2) inlaying; (3) grinding; (4) polishing; (5) Cleaning; (6) Corrosion; (7) Microscopic metallographic examination. The method for detecting non-metallic inclusions of the present invention has the advantages of simple operation, mature technology and high measurement accuracy of inclusions, and can meet the use requirements of most domestic manufacturers.

The present invention is an optical imaging system based on a beam splitting prism and an ultra-high frame rate imaging method, including an optical system and a detector assembly; the optical system contains a beam splitting prism; The prism splits the light, and finally images are formed on multiple detector components, and at the same time, multiple detector components are controlled to expose in sequence to achieve high frame rate imaging of the scene; there are multiple beam-splitting prisms inside the optical system, and the beam passes through each beam-splitting prism. The eight imaging light paths formed behind the prisms are identical. The invention solves the contradiction between high resolution and frame frequency, and the system has the characteristics of high frame frequency, high resolution, compact structure, excellent imaging, convenient use, and strong environmental adaptability.

The invention discloses a femtosecond laser system image focusing method, which belongs to the technical field of femtosecond laser system direct writing processing. The focus position of the laser spot is found by means of the laser across the ink marks on the surface of the substrate. Based on this, the CCD is fixed. , processing objective lens, piezoelectric platform three adjustment hardware, the position of the object as the only adjustment variable, determine and fix the corresponding position of the object in the focusing optical path, and indirectly reflect the laser focus state with the clarity of the imaging state. If the CCD is at the same position, both a clear substrate surface and a clear fringe image can be observed, indicating that the focus is accurate. In the subsequent processing, in order to compensate for the height difference between different substrates, it is only necessary to fine-tune the z-direction position of the processing objective lens to make the stripes clear. The focusing method of the present invention does not need to change the original optical path structure, and it is very easy to realize temporary construction and use. The operation steps are relatively simple, and the requirements for experimental instruments and experimental environment are not high, so it is easy to implement.

The invention relates to a fast wide-field volume holographic fluorescent microscopic imaging system, which is characterized in that it includes a laser light source, a dichroic beam splitter, a microscopic objective lens, a MEMS microreflector array device, a volume holographic grating device, and an imaging lens and the image detector array; the laser light source emits the illumination light wave to the dichroic beam splitter; the dichroic beam splitter irradiates the illumination light wave through the microscopic objective lens to the imaging target, and the fluorescence emitted by the imaging target returns to the dichroic beam splitter through the microscopic objective lens, The microscopic objective lens projects the fluorescence to the MEMS micro-mirror array device; the MEMS micro-mirror array device encodes the angle of the light waves at different positions according to the central wavelength of the imaging spectrum and the Bragg characteristic parameters of the volume holographic grating device, and then controls the angle of the imaging beam. The deflection direction, the deflected imaging beam is incident on the volume holographic grating device at a matching angle; the volume holographic grating device diffracts the incident light encoded by the spatial angle, and the diffracted light is decoded by the MEMS micro-mirror decoding array device and then passes through the imaging lens Imaging onto the image detector array.

The invention discloses an opto-acoustic microimaging system. The opto-acoustic microimaging system comprises an exciting light generator, an exciting light path, a detection light generator, a detection light path, a coupling sensor, a light beam decomposition light path and a signal acquisition module. The coupling sensor comprises a metal film, a prism with a convex structure, and a liquid medium. Exciting light acts on a to-be-detected object to generate and return opto-acoustic waves, and accordingly, the refractive index of the liquid medium changes along with time. Detection light comprises components S and P. The prism acts on the metal film to trigger surface plasma resonance, absorption of the component P is influenced by modulation of refractive index changes of the liquid medium, and the detection light is refracted by the prism after the strength of the component P is changed. The detection light is decomposed into the component S and the component P, and the time-dependent opto-acoustic signals are generated according to light intensity difference signals to achieve imaging. Compared with the prior art, the opto-acoustic microimaging system has the advantages that thevisual angle for signal detection is widened by the prism with the concave structure, the opto-acoustic signals away from the optical axis can be received, the field of view for imaging is improved,and acquiring and imaging of the opto-acoustic signals in a large field of view are realized.