Defect corrections for coherent optical information processing of grayscale images in a DMD-based 4f-system using a collimated light source

Gene, Jinhwa; Sohn, Jong Moo; Shin, Hyun-Chool; Park, Suntak

doi:10.1364/oe.471189

Cited by 4 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, compressing holograms can reduce the quality of the projected images. Some researchers have studied the aberration caused by the defects of DMD under plane wave illumination [34][35][36], but these theories can't correct the aberration caused by spherical illumination of DMD. In certain applications, such as large-field projection [17] and lithograph [37], spherical wave illumination is required to magnify or minify the projection pattern.…”

Section: Introductionmentioning

confidence: 99%

Aberration Correction and Speckle Noise Reduction in Image Minified Lensless Holographic Projection Based on Digital Micro-Mirror Device

Li,

Xia,

Wang

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

Lensless holographic projection technology allows for removing of the projection lens and simplifies the optical projection system. It has great potential to be applied in the fields of three-dimensional printing, integrated circuit fabrication, and display. In this paper, for image minified lensless holographic projection based on digital micro-mirror device (DMD), we examine the aberration that arises from the use of the DMD in the presence of oblique converging spherical wave illumination. To correct this aberration, we employ a diagonal compression technique on the target pattern. Additionally, we address the issue of speckle noise by relaxing the amplitude constraint in the nonsignal domain, which is generated by our proposed aberration correction method. Importantly, this relaxation is achieved without reducing the size of the valid image. Our experimental results demonstrate the successful reconstruction of high-quality images in a lensless holographic projection system.

show abstract

Section: Introductionmentioning

confidence: 99%

Aberration Correction and Speckle Noise Reduction in Image Minified Lensless Holographic Projection Based on Digital Micro-Mirror Device

Li,

Xia,

Wang

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

Hybrid optical convolutional neural network with convolution kernels trained in the spatial domain

Gene,

Park,

Shin

et al. 2024

Neurocomputing

View full text Add to dashboard Cite

Single-shot dual-wavelength telecentric in-line-and-off-axis hybrid digital holography with non-prior reconstruction

Zhao,

Zhong,

Liu

et al. 2024

J. Opt. Soc. Am. A

View full text Add to dashboard Cite

Dual-wavelength in-line-and-off-axis hybrid digital holography (iohDH) can achieve high-resolution holographic dynamic imaging. However, it requires the prediction of the diffraction distance and the complex amplitude of the reference beam, which is time consuming and results in complications and accuracy limitations. While telecentric imaging technique can obtain nondiffractive images without predicting the diffraction distance, it also can even eliminate spherical aberration and astigmatic aberration. Therefore, a dual-wavelength telecentric iohDH is proposed to realize non-prior high-resolution reconstruction in a single shot. Employing the dual-wavelength telecentric iohDH, our approach acquires the focused in-line-and-off-axis hologram using a color camera in a single shot. In this case, we perform wavelength conversion on the phase and low-frequency information about the off-axis hologram as constraints for in-line iteration. Then, the in-line amplitude constraints are performed in the spatial and frequency domains until the algorithm converges. Compared to the state-of-the-art dual-wavelength iohDH, our approach can streamline the reconstructed processes without demanding a priori information of the diffraction distance and the complex amplitude of the reference beam. More importantly, our approach enables higher quality and efficient reconstruction under the telecentric system. We verified our approach using simulations and experiments, and the results indicate that our approach can allow the amplitude and phase reconstruction with high resolution in a single shot.

show abstract

Defect corrections for coherent optical information processing of grayscale images in a DMD-based 4f-system using a collimated light source

Cited by 4 publications

References 29 publications

Aberration Correction and Speckle Noise Reduction in Image Minified Lensless Holographic Projection Based on Digital Micro-Mirror Device

Aberration Correction and Speckle Noise Reduction in Image Minified Lensless Holographic Projection Based on Digital Micro-Mirror Device

Hybrid optical convolutional neural network with convolution kernels trained in the spatial domain

Single-shot dual-wavelength telecentric in-line-and-off-axis hybrid digital holography with non-prior reconstruction

Contact Info

Product

Resources

About