Microscopic imaging is of great significance for medical diagnosis. However, due to the strong scattering and absorption of tissue, the implementation of non-invasive microscopic imaging is very difficult. Traditional single-pixel microscopes, based on reflective optical systems, provide an alternative solution for scattering media imaging. Here, the single-pixel microscope with transmissive liquid crystal modulation is proposed. The microscopic ability of the proposed microscope is calibrated. The multi-spectral microscopic imaging of the object is demonstrated. The transmissive imaging of the object behind the scattering media is analyzed. The proposed prototype of the transmissive single-pixel microscope is expected to be applied in microscopic imaging through scattering media and medical imaging.

Inspired by the human eye retina, foveated single-pixel imaging employs an iterative algorithm, which, unfortunately, poses a challenge for real-time imaging due to its time-consuming nature. To address this issue, we present a non-iterative foveated single-pixel imaging method based on a computationally fast algorithm, reducing time consumption by five orders of magnitude. The fast algorithmic transform facilitates the acquisition of foveated reconstructions. In addition to mimicking human saccadic eye movements, the foveated strategy adapts to motion tracking through the foveal gaze control method. During high-resolution imaging in the fovea area, the maximum sensing area expands 3.14 times, similar to human vision. The proposed retina-like single-pixel imaging has great potential in future applications with the advantages of avoiding complex optics design, low time consumption, and wider vision field.

It is well known that the transverse magnetic field (TMF) can drive the vacuum arc to move continuously on the contact in vacuum interrupters, resulting in a non-axisymmetric characteristic of the vacuum arc. The movement and shape of the vacuum arc will directly influence the interactions between the arc and the electrode, which in turn affects the burning of the arc and successful interruption of the interrupters. In this paper, the motion and morphological changes of a vacuum arc driven by TMF were obtained by adopting a three-dimensional diagnosis method. The vacuum arc was observed by a 3D vacuum arc imaging system from multiple directions, and reconstructed by filtered back-projection (FBP) and Algebra Reconstruction Technique (ART) method based on the record from those directions. Contacts were used with CuCr50 as the contact material. Through the above method, we obtained a 3D model morphological model of a vacuum arc driven by a transverse magnetic field, and analyzed the movement of the vacuum arc under TMF contact by the 3D vacuum arc model.