High time resolution optical imaging system based on optical fiber image transmitting bundle

Abstract

The invention discloses a high time resolution optical imaging system based on an optical fiber image transmitting bundle. The system comprises an optical fiber image transmitting bundle assembly, an optical streak camera, an incident imaging lens and an emergent imaging lens. The optical fiber image transmitting bundle assembly is located between the incident imaging lens and the emergent imaging lens. The emergent imaging lens is located between the optical fiber image transmitting bundle assembly and the optical streak camera. The optical fiber image transmitting beam assembly comprises an incident end head, an emergent end head and m groups of optical fiber bundles. Lengths of the groups of optical fiber bundles are different. Incident ends of fiber cores of each group of optical fiber bundles are uniformly distributed on an end surface of the incident end head in a one-dimensional or two-dimensional mode. Emergent ends of the fiber cores of each group of optical fiber bundles are uniformly distributed on an end surface of the emergent end head in a one-dimensional mode. By using the high time resolution optical imaging system based on the optical fiber image transmitting bundle, the structure is novel and is easy to realize; a high time resolution and a high two-dimensional space distinguishing capability are possessed; and simultaneously the whole system possesses a large detection area and a suitable range is wide.

Description

technical field [0001] The invention relates to a recording device for high energy density physics research, in particular to a high time resolution optical imaging system based on an optical fiber image transmission beam. Background technique [0002] In the research of high energy density physics, many physical processes occur on a very short time scale. In order to diagnose and detect such physical processes, it is necessary to use equipment with high time resolution to record them. The optical streak camera is such a recording device with high time resolution capability. Its time resolution is as high as about 5 ps (picosecond), and it has a very wide range of applications in high energy density physics, especially in the research of laser inertial confinement fusion. For example, the variation process of interference fringes with time is recorded in VISAR, and the variation process of scattered light spectrum with time is recorded by coupling spectrometer in backscatter...

AI Technical Summary

Problems solved by technology

The photocathode converts the light pulse incident from the slit into a photoelectron pulse, and then accelerates and drifts through a high electric field to focus on the small hole of the anode, and then deflects it through a deflection plate whose electric field direction is perpendicular to the slit, because the deflection electric field increases linearly with time , so the light pulses at different times will be deflected to different positions in space after the above process, that is, the time change of the signal is converted into a one-dimensional change of space for recording, while the other dimension of space retains the space to be measured The spatial resolution ability, therefore, the optical streak camera can only resolve one-dimensional direction in space

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