Exact optical path difference and complete performance analysis of a spectral zooming imaging spectrometer

Zhang, Xiangzhe; Huang, Liangwei; Zhu, Jingtao; zhang, Ning; Zong, Kang; Zhai, Lipeng; Cai, Yakun; Wang, Huimin

doi:10.1364/oe.468584

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…The total phase difference can be divided into the phase difference introduced by the DWPs and the quarter-wave plate. The phase difference of the DWP can be expressed as [26]…”

Section: Principlementioning

confidence: 99%

Differential interference contrast phase edging net: an all-optical learning system for edge detection of phase objects

Li,

Chen

et al. 2024

中国光学快报

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Edge detection for low-contrast phase objects cannot be performed directly by the spatial difference of intensity distribution. In this work, an all-optical diffractive neural network (DPENet) based on the differential interference contrast principle to detect the edges of phase objects in an all-optical manner is proposed. Edge information is encoded into an interference light field by dual Wollaston prisms without lenses and light-speed processed by the diffractive neural network to obtain the scale-adjustable edges. Simulation results show that DPENet achieves F-scores of 0.9308 (MNIST) and 0.9352 (NIST) and enables real-time edge detection of biological cells, achieving an F-score of 0.7462.

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“…The total phase difference can be divided into the phase difference introduced by the DWPs and the quarter-wave plate. The phase difference of the DWP can be expressed as [26]…”

Section: Principlementioning

confidence: 99%

Differential interference contrast phase edging net: an all-optical learning system for edge detection of phase objects

Li,

Chen

et al. 2024

中国光学快报

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“…where I(∆) is final interference intensity, σ is the wavenumber, and ∆ is the OPD, which is related to the thickness s of the air gap. The equation of ∆ has been thoroughly analyzed using the wave normal tracing method in our previous work [45].…”

Section: Interference Modulementioning

confidence: 99%

Hyperspectral Channel-Modulated Static Birefringent Fourier Transform Imaging Spectropolarimeter with Zoomable Spectral Resolution

Zhang,

Zhu,

Huang

et al. 2023

Photonics

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A novel channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS) is introduced, which is based on a double Wollaston prism (DWP). With an adjustable air gap (AG), the spectral resolution can be adjusted by changing the AG. The CSBFTIS combines the channel-modulated imaging spectropolarimeter and the slit-free static birefringent Fourier transform imaging spectrometer technology with adjustable spectral resolution. The device is compact and robust, with a wide spectral range and a large luminous flux. Compared with various previous spectropolarimeters, it can greatly reduce the size of the spectral image data to adapt to different application requirements. A prototype is built, and simulation and experiments are carried out, and the results prove the effectiveness of the method.

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“…Currently, various SPI techniques, such as the dispersion type [11], Fourier transform type [12], computational tomography (CT) type [13], and optical filter type [14], have been primarily developed on the basis of spectrum imaging in order to accurately and rapidly extract the spectral polarization information of a target. Prisms and gratings are initially implemented in a dispersive SPI system to discriminate spectral components.…”

Section: Introductionmentioning

confidence: 99%

High Light Efficiency Spectral Polarization Imaging Method Based on Mach–Zehnder Structured Liquid Crystal Tunable Filters and Variable Retarders

et al. 2023

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Liquid crystal tunable filters (LCTFs) are extensively used in hyperspectral imaging systems to obtain spectral information of target scenes. However, a typical LCTF can only filter linearly polarized light, greatly reducing the transmittance of the system and limiting its application in spectral and polarization imaging. In this paper, a spectropolarimeter using Mach–Zehnder structured LCTFs (MZ-LCTFs) combined with liquid crystal variable retarders (LCVRs) is proposed. The polarized beam splitter (PBS) can make full use of the two polarization components of the incident light to improve the transmittance of the system. Specifically, the results show that the mean pixel intensity (MPI) of spectral images is improved by 93.48% compared to a typical LCTF. Subsequently, the average signal to noise ratio (SNR) of filtered and unfiltered images when simultaneously using polarization S and P channels is increased by 2.59 dB compared to a single channel. In addition, the average Standard Deviations (STDs) of DoLP and DoCP are 0.016 and 0.018, respectively. The proposed method has the potential to be applied to obtain polarization information with high optical efficiency and a full spectrum in a wide band.

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Exact optical path difference and complete performance analysis of a spectral zooming imaging spectrometer

Cited by 5 publications

References 18 publications

Differential interference contrast phase edging net: an all-optical learning system for edge detection of phase objects

Differential interference contrast phase edging net: an all-optical learning system for edge detection of phase objects

Hyperspectral Channel-Modulated Static Birefringent Fourier Transform Imaging Spectropolarimeter with Zoomable Spectral Resolution

High Light Efficiency Spectral Polarization Imaging Method Based on Mach–Zehnder Structured Liquid Crystal Tunable Filters and Variable Retarders

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