The Modernization of the Pulkovo Photographic (Photoelectric) Vertical Circle by a CCD Array

1995 ◽  
pp. 333-334
Author(s):  
G. A. Goncharov ◽  
B. K. Bagildinsky ◽  
E. V. Kornilov ◽  
D. D. Polojentsev ◽  
K. V. Rumyantsev ◽  
...  
Keyword(s):  
Vertical Circle ◽  
Ccd Array

scholarly journals The Modernization of the Pulkovo Photographic (Photoelectric) Vertical Circle by a CCD Array

1995 ◽  
Vol 167 ◽  
pp. 333-334
Author(s):  
G. A. Goncharov ◽  
B. K. Bagildinsky ◽  
E. V. Kornilov ◽  
D. D. Polojentsev ◽  
K. V. Rumyantsev ◽  
...  
Keyword(s):  
Focal Plane ◽  
Focal Length ◽  
Wide Field ◽  
List Type ◽  
Type Number ◽  
Pulkovo Observatory ◽  
Vertical Circle ◽  
Ccd Array ◽  
Field Imaging ◽  
Wide Field Imaging

The Zverev photographic vertical circle (PVC) of the Pulkovo observatory is in the process of modernization. The features of the vertical circle are: a)Maksutov mirror-lens optical system with small aberrations and wide passband: aperture: 20 cm, focal length: 200 cm, focal scale: 103 arcsec/mm.b)Very compact instrument: 140 cm total length, 60 cm — tube.c)Wide field: 25 × 25 mm = 40′ × 40′. Wide-field imaging can be combined with meridian observations.d)Easily-reversible instrument: reversing takes less than 30 seconds.e)Two divided vertical circles of glass. Photoelectric circle reading microscopes.f)Photographic micrometer in focal plane. This will be changed with a CCD micrometer.

Fundamental observations made at Breslau in 1922-1925

1978 ◽  
Vol 48 ◽  
pp. 433-435
Author(s):  
F. Schmeidler
Keyword(s):  
The Sun ◽  
Vertical Circle ◽  
Right Ascension

Meridian observations of fundamental stars were made at Breslau Observatory in 1922 to 1925. The observations in right ascension were made by W.Rabe with the 6-inch transit instrument, whereas the declinations were observed by A.Wilkens with the vertical circle. In both coordinates, observations of the Sun were also made.

Channelled spectrum display using a CCD array for student laboratory demonstrations

1994 ◽  
Vol 15 (5) ◽  
pp. 266-271 ◽  
Author(s):  
A G Podoleanu ◽  
S R Taplin ◽  
D J Webb ◽  
D A Jackson
Keyword(s):  
Ccd Array ◽  
Student Laboratory

scholarly journals The LEDs luminance distribution measurement quality dependency on image focusing

2020 ◽  
Vol 12 (4) ◽  
pp. 121
Author(s):  
Dariusz Czyżewski
Keyword(s):  
North America ◽  
Street Lighting ◽  
Distribution Measurement ◽  
Luminance Distribution ◽  
Fluorescent Lamps ◽  
Engineering Society ◽  
Ccd Array ◽  
Testing Techniques ◽  
Color Rendering

Luminance measurements are used in a vast range of lighting technology fields. The author’s research has proved that measuring the luminance distribution on light source surface is the most challenging part of this process. The research has been conducted for a commercially available digital luminance distribution meter, with the goal of analyzing the influence of image focus settings and exposure parameters on the measured luminance values. It has been concluded that the incorrect image focus and inadequately matched exposure parameters (distance from the workpiece) contribute to quantitative changes in the information on luminance distribution on the LED surface and affect the precision the maximum luminance determination. Full Text: PDF ReferencesC. Xu, H. Cheng, and Y. Feng, "Optical design of rectangular illumination with freeform lenses for the application of LED road lighting," Frontiers of Optoelectronics, 2017, CrossRef D. Czyzewski, "LED substitutes of conventional incandescent lamps," Przeglad Elektrotechniczny, vol. 88, no. 11A, pp. 123-127, 2012. DirectLink W. R. Ryckaert, K. A. G. Smet, I. A. A. Roelandts, M. Van Gils, and P. Hanselaer, "Linear LED tubes versus fluorescent lamps: An evaluation," Energy and Buildings, 2012, CrossRef X.-H. Lee, I. Moreno, and C.-C. Sun, "High-performance LED street lighting using microlens arrays," Optics Express, 2013, CrossRef D. Czyzewski, "The street lighting luminaires with LEDs," Przeglad Elektrotechniczny, vol. 86, pp. 276-279, 2009. DirectLink D. Mozyrska, M. Wyrwas, and I. Fryc, "The determination of the LEDs colorimetric parameters, in the range of their operating temperature," Przeglad Elektrotechniczny, vol. 93, no. 4a, pp. 232-234, 2012. DirectLink J. Kowalska and I. Fryc, "Colour rendition quality of typical fluorescent lamps determined by CIE colour fidelity index and colour rendering index," Przeglad Elektrotechniczny, vol. 95, no. 7, pp. 94--97, 2019, CrossRef J. Kowalska, "Analysis of parameters describing the quality of the color rendering of light sources according to the IES TM-30-15 and the CIE 013.3-1995," Przeglad Elektrotechniczny, vol. 93, no. 6, pp. 50--54, 2017, CrossRef K. Houser, M. Mossman, K. Smet, and L. Whitehead, "Tutorial: Color Rendering and Its Applications in Lighting," LEUKOS - Journal of Illuminating Engineering Society of North America, vol. 12, no. 1-2, pp. 7-26, 2016, CrossRef S. Słomiński, "Identifying problems with luminaire luminance measurements for discomfort glare analysis," Lighting Research and Technology, 2016, CrossRef D. Czyzewski, "Investigation of COB LED luminance distribution," 2016, CrossRef M. Jongewaard, "Guide to selecting the appropriate type of light source model," in Proc.SPIE, Aug. 2002, vol. 4775, CrossRef D. Czyzewski, "Selected problems of defining the luminous area of electroluminescent diodes," Przeglad Elektrotechniczny, vol. R. 84, nr 8, pp. 125-128, 2008. DirectLink C. D. Galatanu, "Improving the Luminance Measurement from Digital Images," in 2019 International Conference on Electromechanical and Energy Systems (SIELMEN), 2019, pp. 1-4. CrossRef I. Fryc and E. Czech, "Application of optical fibers and CCD array for measurement of luminance distribution," in Proc. SPIE 5064, Lightmetry 2002: Metrology and Testing Techniques Using Light, 2003, pp. 18-21, CrossRef I. Fryc and E. Czech, "Spectral correction of the measurement CCD array," Optical Engineering, 2002, CrossRef I. Fryc, "Angular characteristics of a silicon detector spectral sensitivity corrected by an absorption filter," in Proc. SPIE 4517, Lightmetry: Metrology, Spectroscopy, and Testing Techniques Using Light, 2001, pp. 42-45, CrossRef I. Fryc, "Accuracy of spectral correction of a CCD array for luminance distribution measurement," in Proc. SPIE 5064, Lightmetry 2002: Metrology and Testing Techniques Using Light, 2003, pp. 38-42, CrossRef M. Moeck and S. Anaokar, "Illuminance analysis from high dynamic range images," LEUKOS - Journal of Illuminating Engineering Society of North America, pp. 211-228, 2006, CrossRef D. Czyżewski, "Research on luminance distributions of chip-on-board light-emitting diodes," Crystals, 2019, CrossRef

The CCD Array Camera for the Macho Project

1994 ◽  
pp. 67-71
Author(s):  
S. Marshall ◽  
C. Alcock ◽  
C. W. Akerlof ◽  
R. A. Allsman ◽  
T. S. Axelrod ◽  
...  
Keyword(s):  
Ccd Array ◽  
Array Camera

TH 7832CDZ (TH X31513) Bilinear CCD Array for Astronomy Applications

1988 ◽  
Vol 132 ◽  
pp. 45-48
Author(s):  
J. L. Coutures ◽  
G. Boucharlat
Keyword(s):  
Spectral Analysis ◽  
Dynamic Range ◽  
Linear Arrays ◽  
New Device ◽  
Low Level ◽  
Ccd Array ◽  
Reading Efficiency ◽  
Photodiode Signal ◽  
Better Than

Photodiode linear arrays are perfectly adapted for spectral analysis. The TH 7832CDZ bilinear array is a new device specially adapted to low level detection (exposure < 7 nJ/cm2) with a reading efficiency of the photodiode signal better than 97% on all the dynamic range (> 70 dB).

A low-cost liquid refractive index sensor based on plastic optical fibre and CCD array

2020 ◽  
Vol 31 (4) ◽  
pp. 047001
Author(s):  
Daniel P Duarte ◽  
Rogério N Nogueira ◽  
Lúcia B Bilro
Keyword(s):  
Refractive Index ◽  
Optical Fibre ◽  
Low Cost ◽  
Refractive Index Sensor ◽  
Ccd Array
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