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Your search keyword '"Kim, Daewook"' showing total 21 results
Start Over Author "Kim, Daewook" Publisher optica publishing group
21 results on '"Kim, Daewook"'

1. E-PVT: Enhanced Position-Velocity-Time scheduler for computer-controlled optical finishing with comprehensive considerations of dynamics constraints, continuity and efficiency

Author

Ke, Xiaolong, primary, Fan, Jiacheng, additional, Wang, Tianyi, additional, Huang, Lei, additional, Zhu, Yi, additional, Austin, Corey, additional, Choi, Heejoo, additional, Kang, Hyukmo, additional, Negi, Vipender, additional, Kim, Daewook, additional, ZHANG, ZILI, additional, Wang, Chunjin, additional, Chen, Shuixuan, additional, Bouet, Nathalie, additional, and Idir, Mourad, additional

Published
2024
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7. Modeling and characterization of OASIS inflatable primary antenna by dual modality metrology

Author

Sirsi, Siddhartha, primary, Quach, Henry, additional, Kang, Hyukmo, additional, Morken, Pete, additional, Palisoc, Arthur, additional, Takashima, Yuzuru, additional, d’Aubigny, Christian, additional, Chandra, Aman, additional, Esparza, Marcos, additional, Karrfalt, Karlene, additional, Derby, Kevin Z., additional, Choi, Heejoo, additional, Kim, Daewook, additional, and Walker, Christopher, additional

Published
2022
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9. Random adaptive tool path for zonal optics fabrication

Author

Negi, Vipender Singh, primary, Wang, Tianyi, additional, Garg, Harry, additional, Pullen, Weslin C., additional, Ke, Xiaolong, additional, Kumar RR, Shravan, additional, Choi, Heejoo, additional, Tiwari, Umesh Kumar, additional, Karar, Vinod, additional, and Kim, Daewook, additional

Published
2022
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17. Universal dwell time optimization for deterministic optics fabrication

Author

Wang, Tianyi, primary, Huang, Lei, additional, Vescovi, Matthew, additional, Kuhne, Dennis, additional, Zhu, Yi, additional, Negi, Vipender S., additional, Zhang, Zili, additional, Wang, Chunjin, additional, Ke, Xiaolong, additional, Choi, Heejoo, additional, Pullen, Weslin C., additional, Kim, Daewook, additional, Kemao, Qian, additional, Nakhoda, Kashmira, additional, Bouet, Nathalie, additional, and Idir, Mourad, additional

Published
2021
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19. A generalized expression for accelerating beamlet decomposition simulations.

Author

Ashcraft JN, Douglas ES, Anche R, Dube BD, Derby KZ, Furenlid L, Kautz M, Kim D, Milani K, and Riggs AJE

Abstract

Paraxial diffraction modeling based on the Fourier transform has seen widespread implementation for simulating the response of a diffraction-limited optical system. For systems where the paraxial assumption is not sufficient, a class of algorithms has been developed that employs hybrid propagation physics to compute the propagation of an elementary beamlet along geometric ray paths. These "beamlet decomposition" algorithms include the well-known Gaussian beamlet decomposition (GBD) algorithm, of which several variants have been created. To increase the computational efficiency of the GBD algorithm, we derive an alternative expression of the technique that utilizes the analytical propagation of beamlets to tilted planes. We then use this accelerated algorithm to conduct a parameter-space search to find the optimal combination of free parameters in GBD to construct the analytical Airy function. The experiment is conducted on a consumer-grade CPU, and a high-performance GPU, where the new algorithm is 34 times faster than the previously published algorithm on CPUs, and 67,513 times faster on GPUs.

Published
2024
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20. Achieving sub-nanometer roughness on aspheric optical mold by non-contact polishing using damping-clothed tool.

Author

Zhang P, Li L, Yang Z, Pan B, Zhang M, Guo X, Li G, Kim D, and Guo J

Abstract

The surface quality of optical lenses is highly required in imaging functions. Normally, ultra-precision turning is employed to fabricate the optical lenses. However, ultra-precision turning cannot meet the surface quality demands due to the tool marks. In this study, a new damping-clothed (DC) tool and chemical enhanced non-Newtonian ultrafine (CNNU) slurry for non-contact polishing are proposed to achieve sub-nanometer roughness on aspherical optical molds. A material removal model based on the hydrodynamic pressure and velocity simulation was established to calculate the dwell time in curved surface machining. The formation mechanism of sub-nanometer roughness is clarified. The proposed method and slurry were verified by the experiments in processing NiP alloy aspheric optical mold. After the process, surface roughness Sa achieved 0.54 nm and the form accuracy is less than PV 600 nm.

Published
2022
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21. Radial shearing dynamic wavefront sensor based on a geometric phase lens pair.

Author

Park HM, Kim D, Guthery CE, and Joo KN

Abstract

A radial shearing dynamic wavefront sensor is theorized and experimentally verified. The proposed sensor is based on a geometric phase lens pair that generates two radially sheared wavefronts. A polarization pixelated camera instantaneously obtains polarization-multiplexed phase maps from a single acquired image using a spatial phase-shifting technique. Experimental tests applied several wavefront shapes with a deformable mirror. The results were compared with a Shack-Hartmann wavefront sensor to evaluate the performance.

Published
2022
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