Abstract
The double phase method is an efficient way to generate phase-only holograms with high reconstruction quality due to no addition of a random phase. However, it cannot directly encode the Fourier spectrum because of the limited gray modulation range of spatial light modulator, and quantization error. This shortage restricts the application of the double phase in the phase-only Fourier hologram, and this issue is never discussed, and solved as far as we know. To solve this issue, we propose a method to generate phase-only Fourier hologram by analyzing quantization error, and adding a proper quadratic phase. The proposed method overcomes the shortage, and outperforms the non-iterative bidirectional error diffusion method in reconstruction quality, and calculation speed with 8.9 dB higher, and 33 times faster on average, respectively.
Highlights
Holographic display is regarded as one of the most promising display technologies and has received strong attention in recent decades since it can reconstruct the optical wave field and provide the depth information of the whole 3-D scene. [1], [2]
The reconstructed images are contaminated by the speckle noise in the background so that the details are too blurry to distinguished
We propose a non-iterative phase-only Fourier hologram generation method
Summary
Holographic display is regarded as one of the most promising display technologies and has received strong attention in recent decades since it can reconstruct the optical wave field and provide the depth information of the whole 3-D scene. [1], [2]. The hologram is divided into amplitude hologram and phase-only hologram (POH) depending on the modulation of spatial light modulator (SLM). POH has higher diffraction efficiency and no conjugate image, and it has been widely concerned [3]–[5]. The random phase is the most common way to generate POHs. serious interference effect occurs in a reconstructed image due to the use of the random phase, which results in speckle noise and degrades the image quality [6]. In order to suppress the speckle noise, various optimization algorithms are proposed to improve the quality of the reconstructed image. Iterative algorithms are widely used to improve the reconstruction quality [7]–[9]. The iterative algorithm is based on forward and inverse diffraction algorithms, and it is time-consuming which is not suitable for the three-dimensional
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