High-Precision Calibration of Phase-Only Spatial Light Modulators

Zhao, Yicheng; Yan, Wenxiang; Gao, Yuan; Yan, Zheng; Ren, Zhi-Cheng; Wang, Xiaohao; Ding, Jianping; Wang, Hui-Tian

doi:10.1109/jphot.2021.3129082

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…There are multiple works on phase SLMs calibration [1][2][3][4][5][6][7][8][9]13,14,20]. All have their pros and cons with respect to a given application.…”

Section: Related Workmentioning

confidence: 99%

TWINS: improved spatial and angular phase calibration for holography

Supikov,

Mefenza Nentedem,

Grunnet-Jepsen

et al. 2023

Appl. Opt.

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We present TWINS (TWo INclining Slits), a method for characterizing phase spatial light modulators (SLMs), inspired by Young interferometry. TWINS is an elegant and versatile approach, using minimal equipment and alignment. It measures phase response locally rather than globally, both horizontally and vertically, with high resolution and at wide angles. It can also measure beam intensity profiles as directly seen by the SLM. TWINS characterizes the anisotropic aberrations in the mainstream models of liquid crystal phase SLMs, which is crucial to improve hologram quality. Compensating for anisotropic aberrations measured by TWINS improved the image quality of planar holograms by 10 dB.

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“…There are multiple works on phase SLMs calibration [1][2][3][4][5][6][7][8][9]13,14,20]. All have their pros and cons with respect to a given application.…”

Section: Related Workmentioning

confidence: 99%

TWINS: improved spatial and angular phase calibration for holography

Supikov,

Mefenza Nentedem,

Grunnet-Jepsen

et al. 2023

Appl. Opt.

View full text Add to dashboard Cite

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“…Spatial light modulator is a general term describing devices that are used to modulate the amplitude, phase, or polarization of light waves. The SLM produces transparency controlled by the computer according to the image or mask required to modulate the light beam [9]. It is worth mentioning here that the operation of the OE scheme may be assisted by DE algorithms to support certain functions which cannot be implemented using the available optical and/or photonic techniques [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Triple Color Image Encryption Using Hybrid Digital/Optical Scheme Supported by High-Order Chaos

2023

IJSER

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Image security has attracted increasing interest, wherein image encryption is an effective and direct method that can be implemented using digital, optical, or hybrid techniques. The challenge is how to design a high-speed, and high-security level multiple color image encryption scheme which makes use of advanced techniques such as chaotic system and deep learning. This issue is addressed in this paper where a nine-dimensional (9D) chaotic-based Hybrid Digital/Optical Encryption (HDOE) scheme is proposed for triple color images. The scheme consists of cascading digital and optical encryption parts controlled separately by the chaotic sequences. The nine chaotic sequences are grouped into three sets, and each set is responsible for the encryption of one of the RGB channels independently. The digital part uses fusion, XOR operation, and scrambling. The optical part uses two independent chaotic phase masks in the optical Fourier transforms domain. A Denoising Convolution Neural Network (DnCNN) is designed to assist the robustness of the decrypted images against Gaussian noise. The simulation results reveal that the proposed triple-image HDOE scheme offers entropy of 7.9991, 7.9987, and 7.9991 bits for R, G, and B channels, respectively, and infinite Peak Signal-to-Noise Ratio (PSNR) for the decrypted images.

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