Equipment for measurement of the granularity of photographic materials

Jaromir Hrdy; Jaroslav Pospisil

doi:10.1117/12.417865

7 March 2001 Equipment for measurement of the granularity of photographic materials

Jaromir Hrdy, Jaroslav Pospisil

Proceedings Volume 4356, 12th Czech-Slovak-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; (2001) https://doi.org/10.1117/12.417865
Event: 12th Czech-Slovak-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2000, Velke Losiny, Czech Republic

Abstract

The realized equipment for measurement of the granularity of black-and-white and color photographic materials is based on low-speed rotation of the optically transmitting granularity sample and microphotometrical scanning of its image. The obtained electrical analogous signal is amplified and converted to the digital form by an analog-to-digital converter and the processed by a special computer system. It is a modern digital-microphotometrical rotational granulometer with originally designed mechanical sample stage and electronical processing system which is useful for the laboratory practice. Its outputs consist of random optical transmittance data of the granularity sample under measurement their mean value and dispersion.

Citation Download Citation

Jaromir Hrdy and Jaroslav Pospisil "Equipment for measurement of the granularity of photographic materials", Proc. SPIE 4356, 12th Czech-Slovak-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, (7 March 2001); https://doi.org/10.1117/12.417865

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