Ultra-high speed flight model front light and shadow imaging device

Abstract

The invention relates to an ultra-high speed flight model front light and shadow imaging device. A time sequence controller of the imaging device is used for triggering the light emitting of a light source and the starting of all the cameras according to the time sequence, and all the cameras are started synchronously. Pulse laser beams generated by the light source are coupled and output throughoptical fibers, are collimated by a first collimating lens and then irradiated to a flight model in a test area. The collimated light beams passing through the flight model are converged through a second collimating lens, and a shadow camera is arranged at the position of 1 cm to 10 cm away from the focal point of the second collimating lens. The imaging main axis of the first front light camera and the imaging main axis of the second front light camera are arranged in a mirror symmetry mode, and the first and second front light cameras are used for imaging the illumination surface of the flight model. The device is used for simultaneously obtaining the front light image and the shadow image of a flight model.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a front light and shadow imaging device for an ultra-high-speed flight model. Background technique [0002] In order to obtain images of its attitude, flow field and model shape during the ultra-high-speed free flight experiment of the model to improve the design parameters of the model, the front light imaging system and the shadow imaging system are usually used to obtain various images of the flight model. Wherein the front light imaging system refers to a system imaging from the illuminated surface of the object, and the shadow imaging system refers to a system imaging from the back of the object relative to the illuminated surface, that is, the shadow surface. [0003] The front light imaging system usually has the characteristics of high positioning accuracy, large test field of view and the ability to obtain model surface damage; the shadow imaging system has the characte...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the front light imaging system and the shadow imaging system of the existing flight model work independently, and the imaging time is difficult to be consistent, so that the associated front light image and shadow image do not correspond to the same measurement of the model position, causing the inaccurate defect of the restored model flight information, providing an ultra-high-speed flight model front light and shadow imaging device

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