High-speed and high-resolution color imaging system combined with multispectral optics: optical layout and feasibility study for combustion analysis

2005 ◽  
Author(s):  
Shinji Takeuchi ◽  
Yoshio Ohno ◽  
Kenji Mitsui ◽  
Masataka Arai
Keyword(s):  
High Resolution ◽  
Feasibility Study ◽  
High Speed ◽  
Imaging System ◽  
Combustion Analysis ◽  
Color Imaging ◽  
Optical Layout

Color Document Imaging with Amorphous Silicon Sensor Arrays

1994 ◽  
Vol 336 ◽  
Author(s):  
R. A. Street ◽  
X. D. Wu ◽  
R. Weisfield ◽  
S. Nelson ◽  
P. Nylen
Keyword(s):  
Amorphous Silicon ◽  
High Speed ◽  
Imaging System ◽  
Sensor Arrays ◽  
Color Imaging ◽  
Silicon Sensors ◽  
Imaging Properties ◽  
Color Filters ◽  
Illumination Source ◽  
Silicon Sensor

ABSTRACTWe describe the performance of an amorphous silicon imaging system designed for high speed (>10 frames/sec) scanning of a document. The system comprises a new page-sized sensor array with 1536×1920 pixels, an illumination source, and the readout electronics. With appropriate color filters, one can achieve color imaging of a document without the registration problems associated with linear scanners. We describe the color imaging properties and discuss how the color response, sensitivity and uniformity depend on the properties of the amorphous silicon sensors.

scholarly journals High-Resolution High-Speed Panoramic Cardiac Imaging System

2008 ◽  
Vol 55 (3) ◽  
pp. 1241-1243 ◽  
Author(s):  
D.W. Evertson ◽  
M.R. Holcomb ◽  
M.D.C. Eames ◽  
M.-A. Bray ◽  
V.Y. Sidorov ◽  
...  
Keyword(s):  
High Resolution ◽  
Cardiac Imaging ◽  
High Speed ◽  
Imaging System

High-speed high-resolution epifluorescence imaging system using CCD sensor and digital storage for neurobiological research

2001 ◽  
Author(s):  
Ichiro Takashima ◽  
Riichi Kajiwara ◽  
Kiyo Murano ◽  
Toshio Iijima ◽  
Yasuhiro Morinaka ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Imaging System ◽  
Digital Storage ◽  
Ccd Sensor ◽  
Neurobiological Research

Spectral Microscopy Imaging System for High-Resolution and High-Speed Imaging of Fuel Sprays

2020 ◽  
Vol 142 (9) ◽  
Author(s):  
Ken Maassen ◽  
Farzad Poursadegh ◽  
Caroline Genzale
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Pressures ◽  
High Efficiency ◽  
Imaging System ◽  
Direct Injection ◽  
Resolving Power ◽  
Microscopy Imaging ◽  
Fuel Sprays ◽  
Primary Breakup

Abstract Modern high-efficiency engines utilize direct injection for charge preparation at extremely high pressures. At these conditions, the scales of atomization become challenging to measure, as primary breakup occurs on the micrometer and nanosecond scales. As such, fuel sprays at these conditions have proven difficult to study via direct imaging. While high-speed cameras now exist that can shutter at tens to hundreds of nanoseconds, and long-range microscopes can be coupled to these cameras to provide high-resolution images, the resolving power of these systems is typically limited by pixel size and field of view (FOV). The large pixel sizes make the realization of the diffraction-limited optical resolution quite challenging. On the other hand, limited data throughput under high repetition rate operation limits the FOV due to reduced sensor area. Therefore, a novel measurement technique is critical to study fuel spray formation at engine-relevant conditions. In this work, we demonstrate a new high-resolution imaging technique, spectral microscopy, which aims to realize diffraction-limited imaging at effective framerates sufficient for capturing primary breakup in engine-relevant sprays. A spectral microscopy system utilizing a consumer-grade DSLR allows for significantly wider FOV with improved resolving power compared to high-speed cameras. Temporal shuttering is accomplished via separate and independently triggered back illumination sources, with wavelengths selected to overlap with the detection bands of the camera sensor's RGB filter array. The RGB detection channels act as filters to capture independently timed red, green, and blue light pulses, enabling the capture of a three consecutive images at effective framerates exceeding 20 × 106 fps. To optimize system performance, a backlit illumination system is designed to maximize light throughput, a multilens setup is created, and an image-processing algorithm is demonstrated that formulates a three-frame image from the camera sensor. The system capabilities are then demonstrated by imaging engine relevant diesel sprays. The spectral microscopy system detailed in this paper allows for micron-scale feature recognition at framerates exceeding 20 × 106 fps, thus expanding the capability for experimental research on primary breakup in fuel sprays for modern direct-injection engines.

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