High dynamic range laser far-field focal spot measurement device and method

A high dynamic range, far-field focal spot technology, applied in the optical field, can solve problems such as limited resolution, detector damage, focal spot distortion, etc., to achieve the effect of ensuring measurement accuracy, high confidence, and high stability
CN104034416AInactive Publication Date: 2014-09-10XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Publication Date
2014-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a high dynamic range laser far-field focal spot measurement device and method. The high dynamic range laser far-field focal spot measurement device comprises a laser beam shrinkage or expander system, an attenuation wedge plate, a spectroscope, a scientific grade CCD (Charge Coupled Device) detector, a micro lens array, a CCD detector and a control computer; the laser beam shrinkage or expander system, the attenuation wedge plate and the spectroscope are arranged on the same light path in turn; the light incident to the spectroscope is divided into the transmission light and the reflected light through the spectroscope; the scientific grade CCD detector is arranged on a light path of the reflected light after the reflected light passes through the spectroscope; the micro lens array and the CCD detector are arranged on a light path of the refracted light in turn after the refracted light passes through the spectroscope; the scientific grade CCD detector and the CCD detector are connected with the control computer. According to the high dynamic range laser far-field focal spot measurement device and method, the dynamic measurement on high dynamic range laser far-field focal spots can be achieved and the measurement accuracy can be well ensured.
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Description

technical field

[0001] The invention belongs to the field of optics, and relates to a high dynamic range laser far-field focal spot measurement device and method, in particular to a laser far-field focal spot reconstruction based on Fourier optics theory to realize a high dynamic range laser far-field focal spot Measuring device and its method. Background technique

[0002] The laser far-field focal spot is an important index to describe the quality of the output beam of a large laser device, and it is also the main parameter to characterize the ability of the laser beam to enter the hole in the inertial confinement fusion system. Due to the great disparity in the optical energy density aberration between the main lobe and the side lobe of the laser far-field focal spot (above 10000:1), there is no detector with such a high dynamic range. At present, the laser far-field focal spot measurement methods mainly include: long focal length lens imaging method, array camera test m...

Claims

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