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  • 11
    Electronic Resource
    Electronic Resource
    Colour Measurement (1941)
    [s.l.] : Nature Publishing Group
    Nature 148 (1941), S. 691-692 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As was recently noted in NATURE1, an increasingly high degree of accuracy in the specification of colour in terms of C.I.E. units is now being sought as a result of the growing realization of the indefiniteness of the colour discrimination limen and the low values it can assume ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/148691a0
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Colour Measurement (1942)
    [s.l.] : Nature Publishing Group
    Nature 149 (1942), S. 247-248 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Messrs. Smith, Guild and Donaldson's fears1 of misconceptions were not at all justified. My letter2 directed attention to certain general aspects of the physics of colour measurement. Emphasis was upon the need for knowledge in order to provide, for the concretest ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/149247a0
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    Direct measurements of nonlinear absorption and refraction in solutions of phthalocyanines (1992)
    Springer
    Applied physics 54 (1992), S. 46-51 
    Details
    ISSN: 1432-0649
    Keywords: 33.00 ; 42.65 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report direct measurements of the excited singlet state absorption cross section and the associated nonlinear refractive cross section using picosecond pulses at 532 nm in solutions of phthalocyanine and naphthalocyanine dyes. By monitoring the transmittance and far field spatial beam distortion for different pulsewidths in the picosecond regime, we determine that both the nonlinear absorption and refraction are fluence (energy per unit area) rather than irradiance dependent. Thus, excited state absorption (ESA) is the dominant nonlinear absorption process, and the observed nonlinear refraction is also due to real population excitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331733
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    Paper (German National Licenses)
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