Bibliografías temáticas / F-θ lens

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Literatura académica sobre el tema "F-θ lens"

Autor: Grafiati

Publicado: 25 de enero de 2025

Última modificación: 31 de julio de 2025

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Artículos de revistas sobre el tema "F-θ lens"

Huang, Kuang-Lung, Mei Chu, Cheng-Huan Chen, Yu-Chung Lin, Min-Kai Lee та Sung-Ho Liu. "Enlarging lens design with f-Θ lens for real time laser lithography inspections". Optical Review 18, № 1 (2011): 72–75. http://dx.doi.org/10.1007/s10043-011-0034-y.

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Rez, Peter. "Analytic integration of contrast transfer functions." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 822–23. http://dx.doi.org/10.1017/s042482010010617x.

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In high resolution microscopy the image amplitude is given by the convolution of the specimen exit surface wave function and the microscope objective lens transfer function. This is usually done by multiplying the wave function and the transfer function in reciprocal space and integrating over the effective aperture. For very thin specimens the scattering can be represented by a weak phase object and the amplitude observed in the image plane is1where fe (Θ) is the electron scattering factor, r is a postition variable, Θ a scattering angle and x(Θ) the lens transfer function. x(Θ) is given by2w

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Yang, Su, An Zhi-yong, Li Qi та Xu Miao. "Optical design of wide-angle large-relative-aperture f-θ lens". Journal of Applied Optics 36, № 3 (2015): 376–80. http://dx.doi.org/10.5768/jao201536.0301007.

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Ning, Chen Wei, Cao Jian Zhong, Yang Hong Tao, et al. "Target Optimization Design of Cam Curve in Zoom System." Key Engineering Materials 552 (May 2013): 44–51. http://dx.doi.org/10.4028/www.scientific.net/kem.552.44.

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Zoom lens has been widely applied in all kinds of fields, and its cam optimization is the key to actualizing the performance of its optical design and the zooming process, while the smoothness and speediness of zooming movement must be considered for military and civilian use. With the incremental use of environmental requirements, it puts forward higher requests to the cam performance of lens. In order to guarantee that the cam has good stiffness in the case of vibration and shock environment, in the process of cam design, it not only requires curve optimal, but also needs to consider influen

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Yuanyuan, LI, WANG Chunyan та WANG Zhiqiang. "F-θ lens design for high-precision semiconductor laser marking machine". Journal of Applied Optics 41, № 1 (2020): 202–8. http://dx.doi.org/10.5768/jao202041.0107003.

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May, Karl Henrik, Shiva Mohammadzadeh, Andreas Keil, Georg von Freymann, and Fabian Friederich. "Coherent Off-Axis Terahertz Tomography with a Multi-Channel Array and f-theta Optics." Sensors 24, no. 2 (2024): 529. http://dx.doi.org/10.3390/s24020529.

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Terahertz tomography is a promising method among non-destructive inspection techniques to detect faults and defects in dielectric samples. Recently, image quality was improved significantly through the incorporation of a priori information and off-axis data. However, this improvement has come at the cost of increased measurement time. To aim toward industrial applications, it is therefore necessary to speed up the measurement by parallelizing the data acquisition employing multi-channel setups. In this work, we present two tomographic frequency-modulated continuous wave (FMCW) systems working

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Tien, Chuen-Lin, Chun-Yu Chiang, and Wen-Shing Sun. "Design of a Miniaturized Wide-Angle Fisheye Lens Based on Deep Learning and Optimization Techniques." Micromachines 13, no. 9 (2022): 1409. http://dx.doi.org/10.3390/mi13091409.

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This paper presents the optimization design of a miniaturized five-element wide-angle fisheye lens using a deep learning algorithm. Zemax optical design software was used to simulate and optimize the wide-angle fisheye lens. A deep learning algorithm helped to find the best combination of different lens materials. We first used six lens elements as an initial configuration to design miniaturized wide-angle fisheye lenses using the optimization process. The optical system components were gradually decreased to five lens elements. Both OKP4HT and polymethyl methacrylate (PMMA) plastic aspheric l

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Volyar, Alexander, Eugeny Abramochkin, Yana Akimova, and Mikhail Bretsko. "Astigmatic-Invariant Structured Singular Beams." Photonics 9, no. 11 (2022): 842. http://dx.doi.org/10.3390/photonics9110842.

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We investigate the transformation of structured Laguerre–Gaussian (sLG) beams after passing through a cylindrical lens. The resulting beam, ab astigmatic structured Laguerre–Gaussian (asLG) beam, depends on quantum numbers (n,ℓ) and three parameters. Two of them are control parameters of the initial sLG beam, the amplitude ϵ and phase θ. The third one is the ratio of the Rayleigh length z0 and the focal length f of the cylindrical lens. It was theoretically revealed and experimentally confirmed that the asLG beam keeps the intensity shape of the initial sLG beam when the parameters satisfy sim

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Wang Chunhui, 王春晖, 季一勤 Ji Yiqin, 高龙 Gao Long, 李彦超 Li Yanchao та 曲杨 Qu Yang. "Optical Design of Large Working Area f-θ Scanning Lens for 2 μm Laser Heterodyne Interferometry System". Chinese Journal of Lasers 38, № 12 (2011): 1216002. http://dx.doi.org/10.3788/cjl201138.1216002.

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Pang, Yajun, Kai Zhang, Zhenxu Bai, Youchun Sun, and Meiling Yao. "Design Study of a Large-Angle Optical Scanning System for MEMS LIDAR." Applied Sciences 12, no. 3 (2022): 1283. http://dx.doi.org/10.3390/app12031283.

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MEMS-based LIDAR has the advantages of fast-scanning, simple structure, small volume, and light weight, which make it a hot topic for 3D imaging. In order to overcome the limited scanning angle of the current MEMS mirrors, a large angle MEMS-based optical scanning system was designed using telephoto structure. In this design an f-θ lens group is used for flat field scanning and a symmetrical cemented lens group is used for angle expansion. The principle of this system is discussed in detail and an optical design is implemented by ZEMAX software. The designed system realized a scanning angle as

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Más fuentes

Tesis sobre el tema "F-θ lens"

Carré, Barnabé. "Développement applicatif sur l’intégrabilité de systèmes d’imageries et de contrôle d’épaisseur par le biais de radar FMCW dans le domaine des ondes Terahertz." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0335.

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Afin de stimuler l'intérêt des industriels pour les systèmes térahertz dans le domaine du contrôle non destructif, ce manuscrit présente diverses méthodes et techniques d'amélioration des performances d'imagerie et de mesure d'épaisseur des capteurs radar sub-THz FMCW (Frequency Modulated Continuous Wave). Les approches d'imagerie focalisée sont restreintes par la diffraction et impliquent un compromis entre résolution latérale et profondeur de champ .La technique d'imagerie SAR (Synthetic Aperture Radar) permet de surmonter ces limites. Dans ce cadre, une nouvelle approche algorithmique est p

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Chen, Chien Chuan, та 陳建銓. "The studies of the f-θ lens design for PCB CO2 laser drilling machine". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/72742398196954358242.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>93<br>The purpose of this thesis is to analyze and design the f-θ lens for the PCB CO2 laser drilling machine by using of ZEMAX optical software. Because the focusing behavior of the general focus lens is non-linear, the velocities of the spots with constant scanning angular speeds are not constant. For this reason, there are several aberrations in the image plane such as astigmatism, field curvature and distortion. Due to these errors, the energy of the spots and the quality of the drilled holes will be decreased. However, the linear focus lens, called f-θ lens, be

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Actas de conferencias sobre el tema "F-θ lens"

Ding, Li, та Bin Shan. "Replacing f-θ lens with normal lens by curve fitting". У Photonics China '98, редактори Qiming Xin та Robert E. Parks. SPIE, 1998. http://dx.doi.org/10.1117/12.318331.

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McIntyre, Kevin J., та G. Michael Morris. "Diffractive Optics Technology for F-Θ Scan Lenses". У Diffractive Optics and Micro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/domo.1996.dtua.4.

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A variety of optical systems utilize F-θ lenses to focus a scanned laser beam to a small spot. Typical applications include laser printing and laser machining. Since scan lenses usually operate at discrete laser wavelengths, diffractive optical components can be incorporated into these designs without the efficiency losses normally associated with broadband applications. This paper will examine the use of diffractive optical elements in F-θ scan lens design. A discussion of some basic design principles is provided. This is followed by a comparison between a refractive system and a hybrid syste

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Kim, Mugeon, Eui su Lee, Dong Woo Park, IL-Min Lee та Kyung Hyun Park. "Hexagonal polygon mirror based terahertz imaging system by using telecentric f-Θ lens". У 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2019. http://dx.doi.org/10.1109/irmmw-thz.2019.8873863.

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Moon, Kiwon, Il-Min Lee, Eui Su Lee та Kyung Hyun Park. "Photonics-based multi-spectral THz imaging using a dual-mode laser and a telecentric f-θ lens". У CLEO: Science and Innovations. OSA, 2019. http://dx.doi.org/10.1364/cleo_si.2019.stu3f.7.

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McIntyre, Kevin J., G. Michael Morris, Susan Dunn, Karen Rumsey, and Ken Ossman. "Laser printer scan lens with diffractive optics." In Diffractive Optics and Micro-Optics. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/domo.1998.jthb.3.

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A scan lens for a laser printer system consists of an F-θ lens and a scanning element, typically a polygon mirror. Due to mechanical wobble and facet-to-facet misalignment, a polygon mirror tends to steer the focused beam out of the intended scan line and therefore requires some form of optical compensation. The most common method1 makes use of anamorphic optical elements. Traditionally, lenses based on this approach contain either a toroidal surface or a reflective cylindrical field lens, both of which are relatively expensive. It is possible to use a diffractive surface to replace the need f

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Frieden, B. Roy. "Fisher information and error complimentarity." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.fl3.

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The Cramer-Rao (CR) inequality e2I ≥ 1 represents complimentarity between (i) the size of mean-squares error e2 in estimation of a parameter θ from an observation y where y = θ + x, and (ii) the Fisher information I due to pdf p(x). In application to quantum mechanics, θ is the classical position of a particle, and I becomes the mean-squares momentum spread for the particle. Thus, the CR inequality becomes the Heisenberg uncertainty principle. The latter is, then, but one example of a general principle of error complimentarity. As applied to optical diffraction, θ is now the unknown centroid o

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Ma, Hsiao-Kang, Jyun-Sheng Wang, and Ya-Ting Chang. "Study of a Pseudo Bipolar Design for a Piezoelectric Proton Exchange Membrane Fuel Cell With Nozzle and Diffuser." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33061.

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Previous studies of a piezoelectric proton exchange membrane fuel cell with nozzle and diffuser (PZT-PEMFC-ND) have shown that a PZT device could solve flooding problems and improve cell performance. The results also indicated that the rectification efficiency (γ) of the diffuser elements, the PZT vibrating frequency (f), and the displaced volume per stroke (ΔV) affected the flow rate of the PZT device. The rectification efficiency of the diffuser elements, which is an indicator of the preferential direction, depends on the geometrical parameters (AR and θ) and the Reynolds number. In this stu

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