Improved pattern generation method via joint computer-generated phase holograms.
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| Title: | Improved pattern generation method via joint computer-generated phase holograms. |
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| Authors: | Shi, Kuo1 (AUTHOR), Pan, Zeyu1 (AUTHOR), Lin, Angyi1 (AUTHOR), Li, Haohao1 (AUTHOR), Zhang, Fucai1 (AUTHOR) zhangfc@sustech.edu.cn |
| Source: | Optics & Lasers in Engineering. Aug2026, Vol. 203, pN.PAG-N.PAG. 1p. |
| Subjects: | Holography, Calibration, Iterative methods (Mathematics), Optical measurements, Speckle interference, Holographic displays, Image reconstruction |
| Abstract: | • Innovative Double Plane Modulation: We introduce dual phase-only planes to manipulate control beam and generate target objects. • Enhanced Reconstruction Quality: Improves image quality by reducing speckle noise and accelerating convergence in iterations. • Optimized Registration and Alignment: Iterative refinement corrects positional mismatch, yielding precise hologram alignment. • Simplified Experimental Setup: The experimental arrangement for our proposed technique is designed to be easy to implement. A method is proposed to address the issues of slow convergence, limited reconstruction quality, and pronounced speckle noise commonly encountered in conventional computer-generated hologram (CGH) generation methods. The method uses two cascaded phase holograms that are jointly designed by an iterative algorithm. It imposes constraints on the double-phase hologram plane and employs a new update formula, which dynamically decouples the phase distributions between the two planes. This process enhances image quality, suppresses speckle artifacts, and accelerates convergence. Importantly, the method incorporates a position calibration module to compensate for positional misalignment between the two phase planes. Simulation and optical experimental results show that the proposed method can achieve holographic reconstruction with low speckle and high image fidelity for both grayscale and binary images. In optical experiments, the position calibration module compensates for sub-pixel inter-plane offsets of 2.23 and 7.85 pixels in the vertical and horizontal directions, respectively. This significantly relaxes alignment constraints and simplifies the experimental setup. This work provides a feasible scheme for an efficient and practical joint holographic display. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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