Associated imaging device and method based on distributed semiconductor laser array

Abstract

The invention provides an associated imaging device and method based on a distributed semiconductor laser array. The devices comprises a laser modulation module which controls switching states of different units of the laser array module according to a preset frequency within a preset time period, and determines the emission power of each laser unit according to preset light intensity information;a laser array module which emits a laser beam; a lens module which shapes and collimates the laser beam; an echo reception module which collects a light beam reflected via a target; a detection module which obtains the intensity of an echo optical signal; an association module which obtains a sub-image of a target object; and an image reconstruction module which obtains an image of the target obtain according to all sub-images of the target object within the preset time period. The distributed semiconductor laser array as a light source is combined with the detection module, the intensity ofthe illumination light field is increased, echo optical signals can be collected with less difficulty, the detection range is longer, the vertical cavity-surface emission laser array serves as the laser units, and the utilization rate of laser power is high.

Description

technical field [0001] The present invention relates to the technical field of optical imaging, and more specifically, relates to an associated imaging device and method based on a distributed semiconductor laser array. Background technique [0002] At present, the optical imaging technology based on intensity correlation is also called ghost imaging. The light field with spatial intensity fluctuation is irradiated on the target object, and the echo signal reflected by the target object is collected many times, and the light field information of the spatial intensity fluctuation is correlated and calculated to obtain a clear image of the target object. Correlated imaging was first realized by using entangled two-photon pairs. Theoretical and experimental studies in recent years have shown that correlative imaging can also be achieved by using thermal light sources or pseudothermal light sources. However, the real thermal optical field usually has short coherence time and lo...

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Problems solved by technology

Not suitable for use in high power applications, thus limiting its use in long-distance detection

In addition, since the wavelength of infrared light is similar to the size of DMD microlenses, the diffraction effect produced is more significant than that of visible light, which leads to a significant decrease in image contrast and affects the imaging quality of infrared scenes.

[0007] In summary, the existing correlation detection imaging distance is relatively short, and the energy loss of the laser during transmission is relatively large

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