Relevant bibliographies by topics / Littrow Condition

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Conference papers

Academic literature on the topic 'Littrow Condition'

Author: Grafiati
Published: 6 September 2023
Last updated: 31 July 2025

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Journal articles on the topic "Littrow Condition"

1

Bezus, Evgeni A., Dmitry A. Bykov, and Leonid L. Doskolovich. "Integrated diffraction gratings on the Bloch surface wave platform supporting bound states in the continuum." Nanophotonics 10, no. 17 (2021): 4331–40. http://dx.doi.org/10.1515/nanoph-2021-0352.

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Abstract We propose and theoretically and numerically investigate integrated diffraction gratings for the Bloch surface wave (BSW) platform, which have subwavelength or near-subwavelength period. We demonstrate that, in the oblique incidence geometry of a transverse-electric polarized BSW and with a properly chosen band gap configuration of the photonic crystal supporting the surface waves, the proposed structures operate in the scattering-free regime, when the energy of the incident BSW is divided between the reflected and transmitted BSWs with the same polarization corresponding to the propa
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2

Yue, Pinliang, Mingyu Yang, Qingbin Jiao, et al. "Compact Numerical Aperture 0.5 Fiber Optic Spectrometer Design Using Active Image Plane Tilt." Sensors 24, no. 12 (2024): 3883. http://dx.doi.org/10.3390/s24123883.

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The numerical aperture of the spectrometer is crucial for weak signal detection. The transmission lens-based configuration has more optimization variations, and the grating can work approximately in the Littrow condition; thus, it is easier to acquire high numerical aperture (NA). However, designing a large aperture focusing lens remains challenging, and thus, ultra-high NA spectrometers are still difficult to acquire. In this paper, we propose a method of setting image plane tilt ahead directly when designing the large aperture focusing lens to simplify the high NA spectrometer design. By ana
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3

Wang, Qingyu, Honghai Shen, Weiqi Liu, Jingzhong Zhang, and Lingtong Meng. "Design of Compact Mid-Infrared Cooled Echelle Spectrometer Based on Toroidal Uniform-Line-Spaced (TULS) Grating." Sensors 22, no. 19 (2022): 7291. http://dx.doi.org/10.3390/s22197291.

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A traditional flat-panel spectrometer does not allow high-resolution observation and miniaturization simultaneously. In this study, a compact, high-resolution cross-dispersion spectrometer was designed based on the theoretical basis of echelle grating for recording an infrared spectrum. To meet the high-resolution observation and miniaturization design requirements, a reflective immersion grating was used as the primary spectroscopic device. To compress the beam aperture of the imaging system, the order-separation device of the spectrometer adopted toroidal uniform line grating, which had both
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4

Liu, Weijian, Qun Yuan, Ruoyan Wang, et al. "Nonnull interferometric testing of spherical gratings under Littrow conditions with opposite diffraction orders." Applied Optics 59, no. 21 (2020): 6360. http://dx.doi.org/10.1364/ao.398003.

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5

Wang, Qingyu, Honghai Shen, Weiqi Liu, and Pengzhang Dai. "A High-Resolution MIR Echelle Grating Spectrometer with a Three-Mirror Anastigmatic System." Applied Sciences 12, no. 16 (2022): 8013. http://dx.doi.org/10.3390/app12168013.

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With the emergence of high-performance infrared detectors and the latest progress in grating manufacturing technology, high-resolution and high-sensitivity infrared spectrometers provide new methods for application to many fields, including astronomy and remote sensing detection. Spectral detection has attracted considerable attention due to its advantages of noncontact and stability. To obtain the detailed features of the missile’s tail flame spectrum, traditional plane reflection gratings are used as the main dispersive element; however, the instrument’s volume will increase with increasing
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6

Qiao, Mingle, Yongfang Xie, Shihao Kang, Jin Wang, and Changhe Zhou. "Polarization-independent and high-efficiency 2D dielectric transmission grating under Littrow incidence." Optics Express 32, no. 20 (2024): 35642. http://dx.doi.org/10.1364/oe.537907.

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In this paper, a transmission two-dimensional (2D) all-dielectric grating with cuboid arrays is proposed, which has high diffraction efficiency and good polarization independence under Littrow mounting conditions at an incident wavelength of 780 nm. The optimization results indicate that when the incident wavelength is 780 nm, the diffraction efficiency of the (−1, 0) order of transverse electric (TE) and transverse magnetic (TM) polarizations can reach 98.62% and 98.23%, respectively, with the polarization-dependent loss (PDL) of 0.017 dB. To the best of our knowledge, high-efficiency polariz
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7

Baroudi, G. El, M. Boulatar, F. K. Maaroufi, W. Ait Belaid T. Ahbala, K. Rabbani, and A. Louzi. "HERNIE DE LITTRE OMBILICALE CHEZ LADULTE: A PROPOS DUN CAS." International Journal of Advanced Research 12, no. 09 (2024): 386–89. http://dx.doi.org/10.21474/ijar01/19466.

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Le diverticule de Meckel est une anomalie congenitale frequente de lintestin grele. Cependant, lorsquun diverticule de Meckel se retrouve dans un sac herniaire, en particulier dans la region ombilicale, il forme ce quon appelle une hernie de Littre. Cette condition rare est associee a des complications graves et necessite une attention diagnostique et chirurgicale specifique.Nous rapportons le cas dun homme age de 56 ans, admis pour une tumefaction ombilicale non douloureuse et reductible. Le diagnostic de hernie ombilicale simple a ete pose. En per operatoire, il a ete decouvert dans le sac h
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8

Roberto-Santamaría, Juan, María J. Rueda-Medécigo, Mariana P. Carmona Olivares, and Alberto Navarrete-Peón. "Littre´s hernia: a case presentation." Mexican Journal of Medical Research ICSA 12, no. 23 (2024): 1–5. http://dx.doi.org/10.29057/mjmr.v12i23.11331.

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We report a case of Littre’s hernia in a 64-year old woman, which is a very uncommon condition, consists on an hernia whose content corresponds to a remnant of the omphalomesenteric duct, called Meckel’s diverticulum, that results from incomplete obliteration of the vitelline duct between the fifth and sixth weeks of human gestation as the bowel settles into its permanent position within the abdominal cavity. The diagnosis was made from the clinical findings and supported by diagnostic auxiliaries such as ultrasound and computed axial tomography (CAT). The intervention performed was a pre-peri
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9

Malling, Brian, Andreas Karlsen, and Jesper Hern. "Littre Hernia: A Rare Case of an Incarcerated Meckel’s Diverticulum." Ultrasound International Open 03, no. 02 (2017): E91—E92. http://dx.doi.org/10.1055/s-0043-102179.

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A Meckel’s diverticulum is a remnant of the vitelline duct, which leads to the formation of a true diverticulum containing all layers of the small intestine. The diverticulum can contain ectopic gastric, duodenal or pancreatic tissue and is the most common congenital anomaly of the gastrointestinal tract with estimates of prevalence ranging from 0.3% to 3%. The condition is usually clinically silent. In children the most common complication is gastrointestinal bleeding caused by ulceration due to the acid secretion by ectopic gastric mucosa.
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10

Nepram, Joe, Kiratpal Singh Brar, Dhiraj Kumar, et al. "Mesodiverticular Band of Meckel’s Diverticulum Causing Small Intestinal Obstruction in Littre Hernia." NATIONAL BOARD OF EXAMINATIONS JOURNAL OF MEDICAL SCIENCES 2, no. 6 (2024): 612–15. http://dx.doi.org/10.61770/nbejms.2024.v02.i06.010.

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Mesodiverticular band associated with Meckel’s diverticulum can lead to surgical emergencies like intestinal obstruction or volvulus and may prove fatal as this pathology is quite rare, it may escape the clinical diagnosis. This band needs to be excised during emergent laparotomy along with Meckel’s diverticulectomy. A high level of clinical suspicion and surgical acumen is required to manage this rare condition and have an uneventful recovery of the patient.
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Dissertations / Theses on the topic "Littrow Condition"

1

Praveen, A. Vishnu. "Investigation of Multi-Axis Beam Steering using Diffraction Grating." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4419.

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Optical beam-steering is becoming a key optical functionality in free space optical links used for communication and sensing. For example, in recent times, compact, wide-angle, fast, multi-axis beam steering is used extensively for LiDAR system in automotive vehicles, remote sensing platforms and deep-space optical communication. The state-of-the-art beam steering optics are typically based on mechanical, optical and/or electronic array designs. The present work investigates alternate schemes to perform multi-axis beam steering using one-dimensional diffraction gratings. Various schemes to per
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Books on the topic "Littrow Condition"

1

A, Haskin Larry, Jolliff Bradley L, and United States. National Aeronautics and Space Administration., eds. A simulated geochemical rover mission to the Taurus-Littrow valley of the moon. National Aeronautics and Space Administration, 1995.

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2

Industry, Prince Edward Island Dept of. Analysis of the economic benefits to the province of the proposed ADATS plant of Litton Systems Canada Limited, November, 1985. Coopers & Lybrand Consulting Group, 1985.

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Coopers & Lybrand Consulting Group. Prince Edward Island Department of Industry: Analysis of the economic benefits to the province of the proposed adats plant of Litton Systems Canada Limited. 1985.

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Conference papers on the topic "Littrow Condition"

1

Jia, Wei, Changhe Zhou, and Jijun Feng. "Miniaturized Pulse Compressor of Deep-Etched Gratings." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18160.

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In this paper we propose a miniaturized pulse compressor which can be used to compensate the group velocity dispersion (GVD) that is produced from a commercial femtosecond laser cavity. The compressor is composed of two identical high efficient deep-etched transmittive gratings. Compared with prism pairs, high efficient deep-etched transmittive grating pairs will have the advantages of small size and light weight. With optimized groove depth and duty cycle, 98% diffraction efficiency of the −1 transmittive order can be achieved at wavelength of 800 nm under Littrow condition. The deep-etched g
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Journal articles
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