Greatly enhanced visual density measurement level of the national standard densitometer

Liu Zi-Long; Chen Rui; Liao Ning-Fang; Li Zai-Qing; Wang Yu

doi:10.7498/aps.61.230601

Abstract

The national standard densitometer can be used for calibrating photographic film and visual photo. The development of biomedical image and space technology need large measurement range and high uncertainty of visual density. A newly designed equipment using hemispherical emitter with optic fiber can enhance the diffuse coefficient of the light to 0.945 which is higher than the other national standards (0.02-0.03). Thus the measurement range can be increased to 0-6.0 and the combined uncertainties are 0.0015 (0 D D < 6.0). On the other hand, the structure design for the whole equipment can realize the reciprocal fixing between the light module and the detect module. So the validity of Helmholtz reciprocity for transmittance measurement can be examined and proved on this new equipment.

Keywords:

Authors and contacts

1.
National Professional Laboratory of Color Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;
2.
Optical Division, National Institute of Metrology, Beijing 100013, China
Funds: Project supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2011BAI02B02).

References

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[10]	Clark F, Parry J J 1985 J. Lighting Research and Technology 17 11
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Cited By

[1]	Smetana K, Klamova H, Jiraskova I, Mikulenkova D, Zapotocky M, Hrkal Z 2012 J. Appl. Biomed. 10 103
[2]	GB/T 11500-2008/ISO5-2: 2008 (in Chinese) [GB/T 11500-2008/ISO5-2: 2008]
[3]	Early E A, Cromer C L, Xiong X X, Dummer D J, O'Brian T R, Parr A C 1999 J. Imag. Sci. Technol. 43 388
[4]	Chen R, Wang Y 2009 Metrology Technology 6 29 (in Chinese) [陈锐, 王煜 2009 计量技术 6 29]
[5]	GB/T 12823.1-2008/ISO5-1: 2008 (in Chinese) [GB/T 12823.1-2008/ISO5-1: 2008]
[6]	McCamy C S 1966 Photogr. Sci. Eng. 10 314
[7]	Buhr E, Hoeshen D, Bergmann D 1999 J. Imag. Sci. Technol. 43 382
[8]	Buhr E, Bergmann D, Early E A, O'Brian T R 2000 J. Imag. Sci. Technol. 44 156
[9]	GB/T 11501-2008/ISO5-3: 2008 (in Chinese) [GB/T 11501-2008/ISO5-3: 2008]
[10]	Clark F, Parry J J 1985 J. Lighting Research and Technology 17 11
[11]	Buhr E, Hoeshen D, Bergmann D 1995 J. Imag. Sci. Technol. 39 453

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Catalog

Vol. 61, Issue 23 - 2012-12-05

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