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.

Microwave photonic based high-resolution ISAR imaging system for high-speed target

2021 ◽  
Author(s):  
Zhengyuan Zhu ◽  
Shaowen Peng ◽  
Yirong Xu ◽  
Xiaoping Zheng
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Imaging System ◽  
Microwave Photonic ◽  
Isar Imaging

Electrical Probing and Surface Imaging of Deep Sub-Micron Integrated Circuits

1999 ◽  
Author(s):  
Kenneth Krieg ◽  
Richard Qi ◽  
Douglas Thomson ◽  
Greg Bridges
Keyword(s):  
High Resolution ◽  
Integrated Circuits ◽  
Real Time ◽  
High Speed ◽  
Time Signal ◽  
Surface Imaging ◽  
Atomic Force ◽  
Submicron Structures ◽  
High Resolution Images ◽  
Capacitive Loading

Abstract A contact probing system for surface imaging and real-time signal measurement of deep sub-micron integrated circuits is discussed. The probe fits on a standard probe-station and utilizes a conductive atomic force microscope tip to rapidly measure the surface topography and acquire real-time highfrequency signals from features as small as 0.18 micron. The micromachined probe structure minimizes parasitic coupling and the probe achieves a bandwidth greater than 3 GHz, with a capacitive loading of less than 120 fF. High-resolution images of submicron structures and waveforms acquired from high-speed devices are presented.

Sign in / Sign up

Export Citation Format

Share Document