Measurement device and method of vector transmission matrix of scattering medium

Abstract

The invention discloses a measurement device of a vector transmission matrix of a scattering medium. The measurement device comprises a vector space light modulation unit, a fourier lens, Mach-Zehnder interference system, an image sensor and computing equipment, wherein the vector space light modulation unit comprises a transmission space light modulator and a small-angle birefringence polarization light splitter; light transmitting through the vector space light modulation unit and the fourier lens is divided into two beams of by a first light splitter prism to enter the Mach-Zehnder interference system and further reaches a recording surface of the image sensor; the beams reaching the recording surface generate interference to form a dual-channel angular multiplexing polarization hologram; and the computing equipment obtains complex amplitude and polarization information of a scattering light field of a sample to be measured and furthers calculates the vector transmission matrix by using the dual-channel angular multiplexing polarization hologram. The vector transmission matrix can be measured quickly and accurately based on the device.

Description

technical field [0001] The invention relates to digital holographic imaging, in particular to a measuring device for scattering medium vector transmission matrix. Background technique [0002] The transport of light through scattering media (SM) is a fundamental problem in physics. Especially in the field of wavefront measurement and imaging research, such as in deep tissue imaging, optical focusing through turbid media, and fiber optic imaging, when the amplitude and phase information of the light wave front passes through the scattering medium, the scattering effect of the scattering medium on the light will give the image The recovery and acquisition of information poses great difficulties. An effective way to overcome this difficulty is to use the transmission matrix (TM), which characterizes the definite relationship between the input light field and the scattered light field passing through the SM, to eliminate the influence of SM on imaging. In recent years, a large...

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Problems solved by technology

However, most methods do not take into account the polarization properties of the scattering medium

Although some of these works have proposed some methods for measuring vector transmission matrix (VTM), these measurement methods require relatively complicated experimental devices, and also involve the rotation control of phase shifting devices and polarizing devices during the measurement process.

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