Image intensifiers are always used to amplify low light level (LLL) images in a wide wavelength range to observable
levels. As a leader in image intensifiers for industrial and scientific applications, intensified CCD (ICCD) is an
innovative product which is a hybrid of image intensifier and CCD. Over the past few decades ICCDs have been
increasingly developed and widely used in a variety of fields such as LLL television system and medical diagnostics. In
this paper, we present the application of ICCD in the field of LLL remote sensing. General LLL imaging devices are
introduced briefly, and their advantages and disadvantages are compared. ICCD technology which includes fundamental,
configuration and development, is expatiated on. The major parameters which incarnate the performance of the LLL
remote sensing ICCD camera are analyzed in detail, such as signal noise ratio (SNR), dynamic range, spatial resolution,
etc. An ICCD camera is designed, and an imaging experiment is made to validate the imaging ability of it in LLL
condition. The experiment results are discussed and summarized. At last, the most important issues to the application of
ICCD in LLL remote sensing are generalized in detail.
Intensified CCD (ICCD) imagers have been widely used in low light level imaging system. While the ICCD has
smaller dynamic range in ubiquity, and its output image is prone to saturation in high light level. In this paper, the
auto-gated power supply method is put forward to implementing automatic brightness control (ABC). Consequently, the
ICCD camera imaging dynamic range is improved. Firstly, the principle of the auto-gated power supply is described
briefly, and the design scheme is carried out in detail. The pulse power control mode is adopted to the photocathode
instead of the traditional high voltage DC power supply, and the analog adjustment mode is adopted to the micro
channel plate (MCP). Secondly, an imaging experiment for ICCD camera was made to validate the auto-gated power
supply design, and the experiment results are presented. The results indicated that the design is valid, and the auto-gated
power supply method helps to improve the image quality of the ICCD camera. Finally, the key problems in the design
are analyzed and summarized in detail.
Proc. SPIE. 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications
KEYWORDS: Digital signal processing, Imaging systems, Interference (communication), Field programmable gate arrays, CCD cameras, Signal processing, Charge-coupled devices, Analog electronics, CCD image sensors, Digital electronics
In this paper,compared with the traditional CCD camera imaging circuits, a kind of integrated
solution for CCD imaging circuits is put forward.The principle of the traditional CCD camera imaging
circuits is described briefly, and the foundational functions are introduced. CCD imaging circuits are the
most important parts of the CCD camera, and they are mainly made up of CCD driver circuits and CCD
signal processing circuits. The CCD signal processing circuits mainly consist of timing generator,
preamplifier circuits, CDS circuits, low-pass filter circuits, PGA circuits, ADC circuits, storage circuits,
output interface circuits, and so on. The popular solution is that all the circuits are made with separate
components.Complex circuit configuration, difficult debugging, uptight power dissipation are evident.
However, it goes without saying that the integrated solutions which combine ADC with FPGA device are
high integration, simple configuration and better agility. Finally, the integrated solution for CCD imaging
circuits is illustrated, and the problems of the circuits are analyzed and summarized in detail.
In this paper, the fundamental of the TDICCD mapping camera is introduced, and the influence of the satellite buffeting on the image quality of the TDICCD camera is analyzed. In order to reduce the influence, a regulated resolution is put forward. Compared with the traditional TDICCD mapping camera, a special TDICCD focal plane which several TDICCD devices splited joint end to end is designed. A great deal of information are captured through the focal plane, and a mathematical model is established to analyze the data information. Then the results are feed back to the satellite, and the attitude of the satellite is actively regulated in real time. Finally, make experiments and simulation to validate it. The experiment result indicate that the design is valid.