Optics: measuring and testing – For light transmission or absorption
Patent
1996-06-24
1997-09-30
Rosenberger, Richard A.
Optics: measuring and testing
For light transmission or absorption
356440, G01N 2101
Patent
active
056731140
ABSTRACT:
A present invention is directed to an apparatus which measures the optical absorption of a sample by photoacoustic measurement and has a configuration for improving the reliability and efficiency in this measurement and is directed to a sample holder applicable to this apparatus. In particular, this sample holder has a specific configuration for improving the reproducibility of acoustic propagation conditions.
REFERENCES:
patent: 4943735 (1990-07-01), Nishikawa
Rosencwaig et al., "Photoacoustic Measurement of Low-Level Absorptions in Solids" Applied Optics, vol. 20, No. 4, (1981) pp. 606-609 15 Feb. 1981.
Jackson et al., "Piezoelectric Photoacoustic Detection: Theory and Experiment" J. Appl. Phys. vol. 51, No. 6, (1980) pp. 3343-3353 Jun. 1980.
Hutchins, "Mechanisms of Pulsed Photoacoustic Generation", Can. J. Phys., vol. 64, (1986) pp. 1247-1264 (no month).
Tam, "Pulsed-laser Generation of Ultrashort Acoustic Pulses: Application for Thin-film Ultrasonic Measurements", Appl. Phys. Lett. vol. 45, No. 5, (1984) pp. 510-512 1 Sep. 1984.
Rosencwaig et al., "Theory of the Photoacoustic Effect with Solids", J. Appl. Phys., vol. 47, No. 1, (1976) pp. 64-69 Jan. 1976.
Nikon Corporation
Rosenberger Richard A.
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