Improved spectral radiance responsivity calibration of charge-coupled-device (CCD) imaging spectrometer with an internally illuminated integrating sphere

2009 ◽  
Author(s):  
Shu-rong Wang ◽  
Zhen-duo Zhang ◽  
Fu-tian Li ◽  
Xiao-hu Yang
Keyword(s):  
Spectral Radiance ◽  
Integrating Sphere ◽  
Imaging Spectrometer ◽  
Charge Coupled Device ◽  
Ccd Imaging

Observations Of The Plasma Torus Of Jupiter With A Fabry-Perot/ Charge-Coupled Device (CCD) Imaging Spectrometer

1981 ◽  
Author(s):  
F. L. Roesler ◽  
F. Scherb ◽  
R. Oliversen ◽  
K. Jaehnig ◽  
T. Williams ◽  
...  
Keyword(s):  
Imaging Spectrometer ◽  
Charge Coupled Device ◽  
Ccd Imaging ◽  
Fabry Perot ◽  
Plasma Torus

Sacrificial charge and the spectral resolution performance of the Chandra advanced CCD imaging spectrometer

2003 ◽  
Author(s):  
Catherine E. Grant ◽  
Gregory Y. Prigozhin ◽  
Beverly LaMarr ◽  
Mark W. Bautz
Keyword(s):  
Spectral Resolution ◽  
Imaging Spectrometer ◽  
Ccd Imaging

Low Cost Digital Image Photogrammetry

1998 ◽  
Vol 14 (03) ◽  
pp. 202-213
Author(s):  
Clifford J. Mugnier
Keyword(s):  
Low Cost ◽  
Digital Camera ◽  
Dimensional Control ◽  
Charge Coupled Device ◽  
Imaging Arrays ◽  
Ccd Imaging ◽  
Camera Systems ◽  
Propagation Analysis ◽  
Error Propagation Analysis ◽  
3D Photogrammetry

A problem in modular shipbuilding is the lack of a reliable, low-cost method of obtaining and utilizing dimensional control in 3D. Photogrammetry has been successfully used as a tool for this application, but because of the large number of systematic errors associated with film-based cameras, only very large shipyards are using it. Recently, developments in Charge Coupled Device (CCD) imaging arrays for cameras have allowed some success in applying photogrammetric techniques dimensional control Mainstream photogrammetric software and hardware configurations have been expensive and complicated. Digital camera systems and computers were purchased and programmed to tie existing inexpensive software packages with Geometric Dilution of Control (GDOP) error propagation analysis, originally designed for topographic mapping, into a tool for production shipyard fabrication dimensional control.

Recent developments for the AXAF CCD imaging spectrometer

1993 ◽  
Author(s):  
David H. Lumb ◽  
Mark W. Bautz ◽  
David N. Burrows ◽  
John P. Doty ◽  
Gordon P. Garmire ◽  
...  
Keyword(s):  
Imaging Spectrometer ◽  
Ccd Imaging ◽  
Recent Developments

The Carbon Fibre Structure for the Extreme Ultraviolet Imaging Spectrometer on the Solar-B Satellite

2005 ◽  
Vol 219 (3) ◽  
pp. 177-186
Author(s):  
C Castelli ◽  
R Hagood ◽  
H Mapson-Menard ◽  
B Winter
Keyword(s):  
Carbon Fibre ◽  
Extreme Ultraviolet ◽  
Thermal Design ◽  
Imaging Spectrometer ◽  
Charge Coupled Device ◽  
Performance Requirements ◽  
Reinforced Plastic ◽  
Final Design ◽  
Carbon Fibre Reinforced Plastic

The Extreme Ultraviolet Imaging Spectrometer (EIS) is a core instrument on the Japanese Solar-B mission and is due for launch in the summer of 2006. EIS is a 3.2 m long telescope employing grating optics and a pair of charge coupled device imaging cameras working in the extreme ultraviolet (EUV) region in two separate wavelength bands between 170-210 and 240-290 Å. To house all the telescope subsystems, a novel carbon fibre reinforced plastic structure was developed in collaboration with McLaren Composites Limited (UK) to meet a set of the demanding performance requirements in terms of dimensional stability, rigidity, and structural cleanliness as well as being able to survive the harsh launch environment of the Japanese M-V rocket. The final design was based on a honeycomb panel structure using stiff carbon fibre laminates. This case study describes some of the design challenges that were overcome for this project to produce the engineering, mechanical, and thermal models. Particular attention is given to the cleanliness control strategy to preserve the EUV optical throughput, the method of attachment to the spacecraft, and of optical subsystems as well as the instrument thermal design.

Validation of spectral radiance assignments to integrating sphere radiance standards for the Advanced Baseline Imager

2014 ◽  
Author(s):  
B. C. Johnson ◽  
Stephen Maxwell ◽  
Eric Shirley ◽  
Kim Slack ◽  
Gary D. Graham
Keyword(s):  
Spectral Radiance ◽  
Integrating Sphere

scholarly journals Adjustable light source for low light level with nearly constant correlated color temperature

2022 ◽  
Vol 2149 (1) ◽  
pp. 012016
Author(s):  
Z F Wu ◽  
L Li ◽  
C H Dai ◽  
Y F Wang ◽  
Q T Cheng ◽  
...  
Keyword(s):  
Light Source ◽  
Spectral Distribution ◽  
Light Level ◽  
Color Temperature ◽  
Spectral Radiance ◽  
Integrating Sphere ◽  
Spectral Difference ◽  
Low Light ◽  
Light Levels ◽  
Variable Aperture

Abstract Low light level (LLL) calibration becomes more and more important since the rapid growth of remote sensing. The spectral radiance at normal higher light levels can be calibrated with good accuracy, while LLL spectral radiance cannot. If an adjustable light source can be designed at nearly constant correlated color temperature (CCT) covering several orders of magnitude, low light level spectral radiance can be obtained with the help of a photodetector. Whether or not the spectral distribution of an integrating sphere based light source is nearly constant is investigated. By adjusting the diameter of the variable aperture between the integrating sphere and tungsten lamp, the spectral radiance can be varied over 6 orders of magnitude. However, the relative spectrum in the red region increases notably when the spectral radiance is decreased to 1/100000. If the spectral radiance is decreased further, the spectral difference can be more than 300% and CCT decreases more than 250 K. By using baffles and another integrating sphere, low light level radiation source at nearly constant spectral distribution is obtained. The variation of CCT is less than 50 K over 6 orders of magnitude.

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