Scanning Laser Technology Applied to High Speed Reticle Writing

1986 ◽  
Author(s):  
Paul A. Warkentin ◽  
James A. Schoeffel
Keyword(s):  
High Speed ◽  
Scanning Laser ◽  
Laser Technology

scholarly journals Laser Patterning a Graphene Layer on a Ceramic Substrate for Sensor Applications

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2134 ◽  
Author(s):  
Marcin Lebioda ◽  
Ryszard Pawlak ◽  
Witold Szymański ◽  
Witold Kaczorowski ◽  
Agata Jeziorna
Keyword(s):  
High Speed ◽  
Graphene Layer ◽  
Ceramic Substrate ◽  
Direct Process ◽  
Laser Technology ◽  
Sensor Applications ◽  
Laser Patterning ◽  
Good Shape ◽  
Shape Mapping ◽  
Sensory Layer

This paper describes a method for patterning the graphene layer and gold electrodes on a ceramic substrate using a Nd:YAG nanosecond fiber laser. The technique enables the processing of both layers and trimming of the sensor parameters. The main aim was to develop a technique for the effective and efficient shaping of both the sensory layer and the metallic electrodes. The laser shaping method is characterized by high speed and very good shape mapping, regardless of the complexity of the processing. Importantly, the technique enables the simultaneous shaping of both the graphene layer and Au electrodes in a direct process that does not require a complex and expensive masking process, and without damaging the ceramic substrate. Our results confirmed the effectiveness of the developed laser technology for shaping a graphene layer and Au electrodes. The ceramic substrate can be used in the construction of various types of sensors operating in a wide temperature range, especially the cryogenic range.

scholarly journals Simultaneous Confocal Scanning Laser Ophthalmoscopy Combined with High-Resolution Spectral-Domain Optical Coherence Tomography: A Review

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Verônica Castro Lima ◽  
Eduardo B. Rodrigues ◽  
Renata P. Nunes ◽  
Juliana F. Sallum ◽  
Michel E. Farah ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
High Speed ◽  
Light Exposure ◽  
Spectral Domain ◽  
Scanning Laser ◽  
Diagnostic Tools ◽  
Optical Coherence ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

We aimed to evaluate technical aspects and the clinical relevance of a simultaneous confocal scanning laser ophthalmoscope and a high-speed, high-resolution, spectral-domain optical coherence tomography (SDOCT) device for retinal imaging. The principle of confocal scanning laser imaging provides a high resolution of retinal and choroidal vasculature with low light exposure. Enhanced contrast, details, and image sharpness are generated using confocality. The real-time SDOCT provides a new level of accuracy for assessment of the angiographic and morphological correlation. The combined system allows for simultaneous recordings of topographic and tomographic images with accurate correlation between them. Also it can provide simultaneous multimodal imaging of retinal pathologies, such as fluorescein and indocyanine green angiographies, infrared and blue reflectance (red-free) images, fundus autofluorescence images, and OCT scans (Spectralis HRA + OCT; Heidelberg Engineering, Heidelberg, Germany). The combination of various macular diagnostic tools can lead to a better understanding and improved knowledge of macular diseases.

High-Speed Automated NDT Device for Niobium Plate Using Scanning Laser Acoustic Microscopy

1988 ◽  
pp. 105-117
Author(s):  
M. G. Oravecz ◽  
B. Y. Yu ◽  
K. L. Riney ◽  
L. W. Kessler ◽  
H. Padamsee
Keyword(s):  
High Speed ◽  
Acoustic Microscopy ◽  
Scanning Laser

scholarly journals High-speed volumetric fluorescein angiography (vFA) by oblique scanning laser ophthalmoscopy in mouse retina

2019 ◽  
Author(s):  
Weiye Song ◽  
Libo Zhou ◽  
Ji Yi
Keyword(s):  
Fluorescein Angiography ◽  
High Speed ◽  
Capillary Flow ◽  
Flow Speed ◽  
Scanning Laser ◽  
Large Field ◽  
Mouse Retina ◽  
Valuable Insight ◽  
Scanning Laser Ophthalmoscopy

AbstractOblique scanning laser ophthalmoscopy (oSLO) is a recently developed technique to provide three-dimensional volumetric fluorescence imaging in retina over a large field of view, without the need for depth sectioning. Here in the paper, we present high-speed volumetric fluorescein angiography (vFA) in mouse retina in vivo by oSLO. By simply using a low-cost industrial CMOS camera, we improved the imaging speed by ~10 times comparing to our previous results, achieving vFA at 2 volumes per second. Enabled by high-speed vFA, we visualized hemodynamics at single capillary level in 3D and provided methods to quantify capillary hematocrit, absolute capillary blood flow speed, and detection of capillary flow stagnancy and stalling. The quantitative metrics for capillary hemodynamics at 3D retinal capillary network can offer valuable insight in vision science and retinal pathologies.

scholarly journals Preventing Evaporation Products for High-quality Metal Film in Directed Energy Deposition: A Review

2021 ◽  
Author(s):  
Kang-Hyung Kim ◽  
Chan-Hyun Jung ◽  
Dae-Yong Jeong ◽  
Soong-Keun Hyun
Keyword(s):  
Metal Film ◽  
High Speed ◽  
Energy Deposition ◽  
High Energy ◽  
High Quality ◽  
Laser Technology ◽  
Directed Energy Deposition ◽  
Film Layer ◽  
Directed Energy ◽  
Quality Metal

Directed Energy Deposition (DED) is a process that enables high-speed deposition with a sub-millimeter thickness using laser technology. Thus far, defect studies on additive manufacturing, including DED, have focused mostly on preventing pores and crack defects that reduce fatigue strength. On the other hand, evaporation products, fumes and spatters, generated by the high energy have often been neglected despite being some of the main causes of porosity and defects. In high-quality metal deposition, the problems caused by evaporation products are difficult to solve, but they have not yet caught the attention of metallurgists and physicists. This review examines the effect of the laser, material, and process parameters on the evaporation products to help obtain a high-quality metal film layer in thin-DED.

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