Time-sharing two-path image acquiring device and calibration method thereof

Abstract

The invention discloses a time-sharing two-path image acquiring device and a calibration method thereof. The time-sharing two-path image acquiring device comprises the components of: a lens, a dividing-to-two prism, a first image sensor, a controller and a second image sensor. The dividing-to-two prism is arranged in an output optical path of the lens and is used for dividing an incident light beam to two sub-light-beams with same light intensity. The first image sensor and the second image sensor are respectively arranged at output light paths of the two sub-light-beams. The controller is connected with the first image sensor and the second image sensor respectively for controlling the first image sensor and the second image sensor to successively perform time-sharing triggering exposure, thereby obtaining object images at different time and achieving an image acquiring frame rate which is twice of that of a single image sensor. The calibration method at least comprises geometric calibration and brightness calibration. The time-sharing two-path image acquiring device and the operating method can remarkably increase image acquiring efficiency and simultaneously ensure image acquiring accuracy. Furthermore the time-sharing two-path image acquiring device has advantages of simple structure and low cost.

Description

technical field [0001] The invention belongs to the technical field of image acquisition, and more specifically relates to a time-sharing two-way image acquisition device and a calibration method thereof. Background technique [0002] High-speed photography means that the camera’s image acquisition frequency is greater than 128 frames per second, and more than 3 frames of photography can be continuously obtained. The necessary equipment to achieve high-speed photography is a high-speed camera. High-speed cameras are widely used in scientific research and many other fields. It is used to record and analyze the movement changes of objects, even the movement of biological organs, microorganisms and molecules. For example, in the field of particle image velocimetry, high-speed cameras have become an indispensable tool. [0003] Particle image velocimetry technology is a kind of image analysis technology. It uses two pulsed laser light sources with a short time interval to illumi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a time-sharing two-channel image acquisition device and its calibration method, which can effectively solve the problem in the prior art that a single image sensor chip needs to achieve an ultra-high-speed nanosecond-level time interval. The frequency of image collection is an extremely expensive technical problem, which significantly increases the frequency of image collection, while ensuring the accuracy of image collection, and the device has a simple structure and low cost

Images