High-precision and low-noise dielectric tensor tomography using a micro-electromechanical system mirror
Optics Express(2024)
摘要
Dielectric tensor tomography is an imaging technique for mapping
three-dimensional distributions of dielectric properties in transparent
materials. This work introduces an enhanced illumination strategy employing a
micro-electromechanical system mirror to achieve high precision and reduced
noise in imaging. This illumination approach allows for precise manipulation of
light, significantly improving the accuracy of angle control and minimizing
diffraction noise compared to traditional beam steering approaches. Our
experiments have successfully reconstructed the dielectric properties of liquid
crystal droplets, which are known for their anisotropic structures, while
demonstrating a notable reduction in background noise of the imag-es.
Additionally, the technique has been applied to more complex samples, revealing
its capability to achieve a high signal-to-noise ratio. This development
represents a significant step forward in the field of birefringence imaging,
offering a powerful tool for detailed study of materials with anisotropic
properties.
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