Optics: measuring and testing – For light transmission or absorption
Patent
1985-11-19
1989-05-16
Rosenberger, Richard A.
Optics: measuring and testing
For light transmission or absorption
356440, G01N 2100
Patent
active
048305022
ABSTRACT:
An apparatus for measuring a light absorpiton characteristic of a thin film is provided.
The apparatus comprises (1) a liquid container containing a liquid on which surface a thin film is to be spread, (2) exciting light source for supplying an exciting light to be projected from below the liquid surface on to a measurement site of the thin film spread on the liquid surface, at such an incident angle that the exciting light reflects totally at the liquid surface, (3) a chopper for converting the exciting light into an intermittent exciting light before the exciting light reaches the measurement site of the thin film, (4) a probe light source for supplying probe light passing the measurement site or its vicinity, and (5) a detector for detecting an amount of deflection of the probe light having passed the measurement site or its vicinity. A method for measuring the light absorption characteristic of a thin film and an equipment for forming a monomolecular built-up film employing the above apparatus are also provided.
REFERENCES:
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4529319 (1985-07-01), Muller
"Trace Analysis In Gases Laser Induced Schlieren Technique", Hermann et al., Infrared Physics, vol. 19, #3, pp. 455-459, 8/1979.
"Photothermal Deflection Spectroscopy and Detection", Jackson et al., Applied Optics, vol. 20 #8, pp. 1333-1344, Apr. 1981.
"Second Sound Spectroscopy: A New Method for Studying Optical Absorption In Solids", Smith et al., Physics Letters, vol. 56A, #3, pp. 223-224, 3/1926.
"Internal-Reflection Spectroscopy", Molm et al., Laser Focus, Aug. 1979, pp. 60-65.
Eguchi Ken
Kawada Haruki
Nakagiri Takashi
Nishimura Yukuo
Saito Kenji
Canon Kabushiki Kaisha
Rosenberger Richard A.
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