Characterization of a spatial light modulator using polarization-sensitive digital holography

Tiwari, Vipin; Gautam, Surya Kumar; Naik, Dinesh N.; Singh, Rakesh Kumar; Bisht, N. S.

doi:10.1364/ao.380572

Cited by 23 publications

(15 citation statements)

References 30 publications

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“…The phase modulation characteristics of LC-SLM can be calibrated using interferometric measurements [14,27,[37][38][39][40][41][42]. The interferometry enables to record the intensity and phase of light simultaneously in the form of fringes (interference pattern).…”

Section: Interferometric Methodsmentioning

confidence: 99%

“…In addition, LC-SLM serves key role in the experimental demonstration of advanced digital holographic techniques, viz. coded aperture correlation holography (COACH) [22][23][24], Fresnel incoherent correlation holography (FINCH) [2,24], Stokes correlation holography [21,25,26], polarization holography [18,19,[27][28][29], etc. This chapter presents comprehensive literature (review) on the LC-SLM and its applicability in digital holography.…”

Section: Introductionmentioning

confidence: 99%

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Spatial Light Modulators and Their Applications in Polarization Holography

Tiwari¹,

Bisht²

2023

Holography - Recent Advances and Applications

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Liquid crystal spatial light modulators (LC-SLMs) have gained substantial interest of the research fraternity due to their remarkable light modulation characteristics in modern imaging applications. Replacing the conventional optical elements from the SLM-based computer-generated holograms (CGHs) is a trending approach in modern digital holographic applications due to the optimized phase shift depending on the phase modulation features of SLMs. Apparently; SLMs serve a crucial role in the experimental implementation of digital holographic techniques. However, the resolution of the CGHs are sometimes limited by the structural discrepancies (fill factor, spatial anomalies, refresh rate, etc.) of SLM. Therefore, it is recommended to calibrate the modulation characteristics of SLMs prior to their implementation for imaging applications. This chapter provides comprehensive literature (review) of the LC-SLMs along with their major calibration methods. In addition, recent interesting applications of LC-SLMs have been discussed thoroughly within the framework of polarization holography.

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Section: Interferometric Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial Light Modulators and Their Applications in Polarization Holography

Tiwari¹,

Bisht²

2023

Holography - Recent Advances and Applications

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“…In general, the measurement methods of phase modulation characteristics can be divided into two groups-the interference method and the diffraction method. Among them, interferometry mainly includes double-slit/hole interferometry [5][6][7], Twyman-Green interferometry [8][9][10][11], Mach-Zehnder interferometry [12][13][14], and digital holographic interferometry [15][16][17]. The measurement of phase modulation characteristics of interferometry mainly depends on the displacement of fringe pattern, but the two beams have to travel a long path in the air before the interference, and the mechanical vibration, air turbulence, and other environmental factors will cause the change of their optical path difference, resulting in a large fluctuation in the acquisition of fringe pattern.…”

Section: Traditional Methods To Measure the Phase Modulation Curve Of Lc-slmmentioning

confidence: 99%

High Precision Optical Wavefront Generation Using Liquid Crystal Spatial Light Modulator (LC-SLM)

Zhao¹

2022

Liquid Crystals

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LC-SLM provides a flexible way to modulate the phase of light with the help of a grayscale pattern loaded on it. Nevertheless, the modulated phase profile is of relatively low accuracy due to the nonlinear and nonuniform response of the liquid crystal layer in the SLM. To improve the performance of LC-SLM on the wavefront generation, the nonlinear and nonuniform phase response needs to be calibrated and compensated effectively. In this chapter, we present some state-of-art methods to measure the phase modulation curve of the LC-SLM. Some methods to measure the static aberration caused by the backplane of the LC-SLM are then presented. Last but not the least, the future development of the LC-SLM in phase modulation is also presented.

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“…Numerous techniques on SLM characterization have been reported in the recent past [5,[8][9][10][11][12][13][14]. These techniques can be divided into two main categories, that is, phase characterization techniques [1,3,9,10,15,16] and amplitude and intensity characterization techniques [12,14,15,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…SLMs are most effective for their amplitude and phase modulation characteristics and hence most of the calibration methods revolve around phase characterization of SLM. Jones matrix imaging [8,11,15], fringe shifting interferometry [3], and phase mask-enabled digital holography [10] are well-known techniques to calibrate the phase modulation characteristics of SLM. However, these techniques are not capable to characterize the intensity modulation and other crucial polarimetric characteristics, that is, diattenuation, polarizance, retardance, and SOP of light after passing through SLM.…”

Section: Introductionmentioning

confidence: 99%

Spatially Addressable Polarimetric Calibration of Reflective-Type Spatial Light Modulator Using Mueller–Stokes Polarimetry

2021

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Mueller–Stokes polarimetry is emerging as a prominent noninvasive imaging technique to study the structural characteristics of an anisotropic medium. Spatial light modulator (SLM) is a programmable liquid crystal device (LCD), which is used to modulate the amplitude, phase, and polarization of light. The compact design and cumbrous manufacturing process of SLM requires its polarimetric calibration prior to its utilization for various applications. In this study, we experimentally demonstrate Mueller–Stokes imaging of a reflective-type SLM (Holoeye, LCR-720) to calibrate its polarization modulation characteristics with respect to its dynamic gray value range (0–255) at different spatial locations of SLM screen. Mueller matrices at 18 different gray values of SLM at an interval of 15, that is, at gray values 0, 15, 30, up to 255 have been experimentally measured using an improvised Mueller matrix imaging polarimeter (MMIP). Crucial polarimetric characteristics, that is, diattenuation, polarizance, state of polarization (SOP), depolarization, and retardance have been estimated with respect to the gray value range of SLM. Significant polarization modulation characteristics [diattenuation (0.08–0.3), polarizance (0.02–0.2), and retardance (0 to π)] have been determined for the SLM. These results indicate that the SLM exhibits spatially variable depolarizing nature and hence it is not perfectly homogeneous in structure. Therefore, it is expected that the outcomes of this study would be helpful for exploring the applicability of Mueller–Stokes polarimetry in advancement of LC technology.

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Characterization of a spatial light modulator using polarization-sensitive digital holography

Cited by 23 publications

References 30 publications

Spatial Light Modulators and Their Applications in Polarization Holography

Spatial Light Modulators and Their Applications in Polarization Holography

High Precision Optical Wavefront Generation Using Liquid Crystal Spatial Light Modulator (LC-SLM)

Spatially Addressable Polarimetric Calibration of Reflective-Type Spatial Light Modulator Using Mueller–Stokes Polarimetry

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