Results 11 to 20 of about 43,891 (214)
Optimal Design and Analysis of 4.7 μm Hybrid Deep Dielectric High Efficiency Transmission Gratings
Micromachines, 2022 There is currently no transmission grating with good diffraction efficiency in the 4.7 μm band. Metal gratings at this wavelength are all reflective gratings which has a diffraction efficiency of lower than 90% and lower laser damage threshold.
Ye Wang +6 more
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Analytic Design of Segmented Phase Grating for Optical Sensing in High-Precision Alignment System
Sensors, 2021 Ultra-precision measurement systems are important for semiconductor manufacturing processes. In a phase grating sensing alignment (PGA) system, the measurement accuracy largely depends on the intensity of the diffraction signal and its signal-to-noise ...
Guanghua Yang +4 more
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Ultra-Precision Cutting and Characterization of Reflective Convex Spherical Blazed Grating Elements
Micromachines, 2022 In this work, based on the diffraction principle of reflective blazed grating, the structure size of the convex spherical blazed grating unit is determined, the machining accuracy of the convex spherical blazed grating is formulated, the effects of tool ...
Huang Li +3 more
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Design and Fabrication of Silicon-Blazed Gratings for Near-Infrared Scanning Grating Micromirror
Micromachines, 2022 Blazed gratings are the critical dispersion elements in spectral analysis instruments, whose performance depends on structural parameters and topography of the grating groove.
Sinong Zha +4 more
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Diffraction by random Ronchi gratings [PDF]
Applied Optics, 2016 In this work, we obtain analytical expressions for the near-and far-field diffraction of random Ronchi diffraction gratings where the slits of the grating are randomly displaced around their periodical positions. We theoretically show that the effect of randomness in the position of the slits of the grating produces a decrease of the contrast and even ...
Torcal Milla, Francisco José +1 more
openaire +4 more sources
Three-dimensional angular deviation and diffraction efficiency of a grating in Littrow-configuration ECDL [PDF]
Opt. Laser Technol., 2024, 170: 110293, 2023 We consider in this paper the angular deviation and diffraction efficiency of the reflection gratings in Littrow-configuration for applications of external cavity diode laser using the rigorous coupled-wave analysis method. We consider the three-dimensional diffraction case in general, where the incidence plane is un-parallel with the grating vector, i.
arxiv +1 more source
Diffraction of gratings with rough edges [PDF]
Optics Express, 2008 We analyze the far field and near field diffraction pattern produced by an amplitude grating whose strips present rough edges. Due to the stochastic nature of the edges a statistical approach is performed. The grating with rough edges is not purely periodic, although it still divides the incident beam in diffracted orders.
Torcal Milla, Francisco José +2 more
openaire +4 more sources
Applied Sciences, 2023 We design a unique external cavity configuration and present an ultra-narrow linewidth external cavity diode laser (ECDL) employing a wide interference filter and diffraction grating.
Yan Wang +8 more
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A Switchable Cholesteric Phase Grating with a Low Operating Voltage
Crystals, 2021 We demonstrate a simple fabrication method of a uniform-lying-helix (ULH) cholesteric liquid crystal (ChLC) cell for phase grating device applications.
Ho-Jin Sohn +4 more
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Student recognition of interference and diffraction patterns: An eye-tracking study
Physical Review Physics Education Research, 2020 Previous studies have demonstrated that students have difficulties in applying the wave model of light to explain single-slit diffraction and double-slit interference patterns.
Ana Susac +4 more
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