Optical Engineering + Applications最新文献_第5页

Design and fabrication of a linear Fresnel-type reflector for solar concentration based on caustic surfaces by reflection 基于焦散面反射的线性菲涅耳型太阳聚光反射器的设计与制造

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677439

Martín Jiménez-Rodríguez, M. Avendaño-Alejo, Edwin Román-Hernández, Estefania López-Gómez, Gabriel Castillo-Santiago, I. Velázquez-Gómez, Osvaldo Ponce-Hernández, J. DelOlmo-Márquez, L. Castañeda

引用次数: 0

Hartmann-type hybrid null screens for testing a fast plano-convex aspherical condenser 用于测试快速平凸非球面聚光镜的哈特曼型混合零屏

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677490

Gabriel Castillo-Santiago, J. DelOlmo-Márquez, M. Avendaño-Alejo, V. Moreno-Oliva, Edwin Román-Hernández, Martín Jiménez-Rodríguez, Osvaldo Ponce-Hernández

{"title":"Hartmann-type hybrid null screens for testing a fast plano-convex aspherical condenser","authors":"Gabriel Castillo-Santiago, J. DelOlmo-Márquez, M. Avendaño-Alejo, V. Moreno-Oliva, Edwin Román-Hernández, Martín Jiménez-Rodríguez, Osvaldo Ponce-Hernández","doi":"10.1117/12.2677490","DOIUrl":"https://doi.org/10.1117/12.2677490","url":null,"abstract":"We design two different Hartmann type null screens based on an exact ray trace for testing a fast plano-convex aspherical condenser. The first null screen is designed for testing the external convex surface or periphery area for the condenser by reflection. We have implemented an exact ray trace assuming a point source placed along the optical axis, emitting a bundle of rays, which are reflected by the surface under test, to obtain a non-uniform array of spots, which are printed on paper sheet and wrapped on a plastic cylinder fabricated by using additive manufacture. Subsequently, by reversibility Principle’s after by reflection we obtain a uniform array pattern displayed at the detection plane. Alternatively, to evaluate the whole area for the condenser, the second null screen is designed for testing the central convex area for the condenser by refraction. Thus, we have implemented an exact ray trace assuming an incident plane wavefront, these rays are refracted through the lens under test, to obtain a non-uniform array of drop spots, which are printed on plastic sheet and placed in front of the lens under test. Finally, assuming the reversibility Principle’s after by refraction we obtain a uniform array pattern displayed at the detection plane. For this method, we have called Hartmann type hybrid null screens.","PeriodicalId":434863,"journal":{"name":"Optical Engineering + Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132474395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary mechanical design of GrainCams payload for the CLPS lunar rover CLPS月球车GrainCams载荷的初步机械设计

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677855

Woojin Kim, B. Moon, Dukhang Lee, Dae-Hee Lee, Min-Bae Kim, M. Jeong, Jihun Kim, Seonghwan Choi, Jehyuck Shin, Mingyeong Lee, S. Baek, C. Sim, Young-Jun Choi, Sungsoo S. Kim

{"title":"Preliminary mechanical design of GrainCams payload for the CLPS lunar rover","authors":"Woojin Kim, B. Moon, Dukhang Lee, Dae-Hee Lee, Min-Bae Kim, M. Jeong, Jihun Kim, Seonghwan Choi, Jehyuck Shin, Mingyeong Lee, S. Baek, C. Sim, Young-Jun Choi, Sungsoo S. Kim","doi":"10.1117/12.2677855","DOIUrl":"https://doi.org/10.1117/12.2677855","url":null,"abstract":"GrainCams is a lunar rover payload designed to explore lunar dust. It is a suite of two light field cameras: SurfCam and LevCam. The main goal of SurfCam is to provide 3D imaging of fairy castle structures believed to exist on the lunar surface. LevCam’s objective is to understand dust speed and track the trail of lofting dust on the lunar surface. The mechanical stiffness of the camera is capable of enduring the vibration and shock conditions of the launcher. Thus, we conducted the opto-mechanical design for Surfam and analyzed the safety through theoretical estimation. The safety of whole structure is also reviewed from structural analysis such as linear static analysis and modal analysis. These cameras will operate in the extreme temperature of the moon. To achieve a viable thermal design despite the extreme lunar thermal environment and uncertainty of the payload interface with the rover, we assumed a thermal adiabatic payload interface and employed passive (e.g., thermal insulation blankets (MLIs), surface control of thermal radiation, specially designed radiators with an inclination angle of 36.5° to effectively avoid Solar flux and maximize unobstructed view of space relative to the lunar surface in hot cases) and active (e.g., heaters) thermal control techniques. Each camera should weigh no more than 5 kg and consume no more than 20 W of power. In this paper, we present the preliminary results of the structure design of GrainCams.","PeriodicalId":434863,"journal":{"name":"Optical Engineering + Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133008298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing the alignment of the Korsch telescope with consideration of gravitational effects 考虑引力效应的Korsch望远镜优化对准

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2676637

Goeun Kim, D. Ryu, Y. Youk, Jeeyeon Yoon, Shinwook Kim

{"title":"Optimizing the alignment of the Korsch telescope with consideration of gravitational effects","authors":"Goeun Kim, D. Ryu, Y. Youk, Jeeyeon Yoon, Shinwook Kim","doi":"10.1117/12.2676637","DOIUrl":"https://doi.org/10.1117/12.2676637","url":null,"abstract":"We propose an alignment strategy that includes optimization criteria and appropriate targets to achieve satisfactory performance both on the ground and in space. The performance of a space telescope can vary significantly based on its assembly and alignment on the ground and its operation in space. Simulations were conducted to study the effects of gravity on a Korsch-type telescope with 0° astigmatism in the primary mirror. The results indicated that gravity influenced overall performance and led to an imbalance in performance across different fields. We propose three optimization criteria: overall, balanced, and good performance in both ground- and space-based environments. To meet these criteria, the telescope was optimized under the influence of gravity. Consequently, the selected optimization target successfully met the criteria by achieving good and balanced performance on the ground and in space. However, typical optimization targets, such as minimizing and designing the RMS wavefront error, are unable to fulfill all three criteria. Therefore, our alignment strategy offers a suitable solution that considers gravitational effects.","PeriodicalId":434863,"journal":{"name":"Optical Engineering + Applications","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133709950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tolerance analysis of off-axis freeform three-mirror KASI-deep rolling imaging fast telescope 离轴自由三镜kasi深滚转成像快速望远镜公差分析

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2674544

Yunjong Kim, G. Lee, Jihun Kim, Seunghyuk Chang, Dohoon Kim, I. Moon, Daewook Kim, J. Ko

引用次数: 0

Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy 偏振全息成像斯托克斯分光偏振计在天文学中的应用

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677357

B. Kilosanidze, G. Kakauridze, I. Chaganava, T. Kvernadze, Georgi Kurkhuli, L. Oriol, M. Piñol, Q. Wei

{"title":"Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy","authors":"B. Kilosanidze, G. Kakauridze, I. Chaganava, T. Kvernadze, Georgi Kurkhuli, L. Oriol, M. Piñol, Q. Wei","doi":"10.1117/12.2677357","DOIUrl":"https://doi.org/10.1117/12.2677357","url":null,"abstract":"An innovative polarization-holographic imaging Stokes spectropolarimeter is presented. The main analyzing unit of such a polarimeter is the integral polarization-holographic diffraction element, which enables the complete analysis of the polarization state of incoming light to be carried out in real-time. It decomposes the incoming light into diffraction orders, the intensities of which vary depending on the polarization state of the light source. After the simultaneous diffraction order intensity measurements of the corresponding points or areas in the diffraction orders, we get the real-time Stokes images of the light source, which allows determining the entire polarization state of a point or extended space object for different spectral regions and variable polarization. A working aperture can be from 0.5 cm up to 5 cm in diameter. The results of studies on improving the stability and diffraction efficiency of the element are presented. Measurements of the polarization state by the standard star were carried out to calibrate the spectropolarimeter. Polarimetric measurements of some astronomical objects have been carried out. The resulting errors are better than 10-2. The polarization-holographic imaging Stokes spectropolarimeter has no mechanically moving or electrically tunable optical elements, has no internal reflections, and is universal, compact, cost-effective, and lightweight.","PeriodicalId":434863,"journal":{"name":"Optical Engineering + Applications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115669096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep neural network for incongruent point clouds registration 非一致点云配准的深度神经网络

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677782

S. Voronin, A. Vasilyev, V. Kober, A. Makovetskii, A. Voronin, Dmitrii Zhernov

引用次数: 0

Multiple point cloud registration and global consistency condition 多点云配准与全局一致性条件

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677107

A. Makovetskii, S. Voronin, V. Kober, A. Voronin, T. Makovetskaya

引用次数: 0

Shape-adjustable heliostats: designs for individuals and fields for > 3000 concentration 形状可调定日镜:设计为个人和领域> 3000浓度

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2681483

Nicholas Didato, R. Angel, M. Rademacher

{"title":"Shape-adjustable heliostats: designs for individuals and fields for > 3000 concentration","authors":"Nicholas Didato, R. Angel, M. Rademacher","doi":"10.1117/12.2681483","DOIUrl":"https://doi.org/10.1117/12.2681483","url":null,"abstract":"Shape-adjustable heliostats can maintain a focused image of the solar disc on a receiver target throughout the day, as the angle of incidence (AOI) changes on the reflector. This requires the heliostat reflector to be deformed into a unique biconic concave shape dependent on AOI. The reflector comprises a single rectangular sheet of silvered float glass mounted to a steel frame. Its shape is set initially, by adjusting the height of mounting points, to the biconic shape required for imaging at 60 degrees AOI. Shapes for other AOIs are obtained by twisting the frame from its four corners and center. A finite element model was made of a heliostat designed to form a disc image on a 130 m distant receiver using a single sheet glass reflector, 1/8” thick x 130” x 96”, supported by 58 points on a rectangular tube frame structure weighing 120 kg. Analysis shows an overall RMS slope error <1 mrad for all AOI from 0 to 70 degrees. Without twisting, the RMS slope error would be ~3.5 mrad at 0° and 70° AOI. Preliminary results from analysis of slope error maps generated from the FE model indicate encircled energies within the ideal solar disc radius of >85% are achievable. Models of fields of closely packed heliostats of this type, on target axis mounts, demonstrate a geometrical throughput into the receiver of >73% of the total mirror area, after accounting for blocking, shadowing, and cosine loss. In one model, with 450 heliostats powering five compound parabolic concentrators at a receiver, a concentration of > 3,000 was obtained at powers > 1 MW, through much of the day.","PeriodicalId":434863,"journal":{"name":"Optical Engineering + Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130784826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Convolutional auto-encoder to extract local features of 2D images 卷积自编码器提取二维图像的局部特征

Optical Engineering + Applications Pub Date : 2023-10-04 DOI: 10.1117/12.2677848

V. Kober, S. Voronin, A. Makovetskii, Dmitrii Zhernov, A. Voronin

引用次数: 0