Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1982-06-08
1985-10-01
Rosenberger, R. A.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
G01N 2100
Patent
active
045442746
ABSTRACT:
The thermal lensing phenomenon is used as the basis for measurement of weak optical absorptions when a cell containing the sample to be investigated is inserted into a normally continuous-wave operation laser-pumped dye laser cavity for which the output coupler is deliberately tilted relative to intracavity circulating laser light, and pulsed laser output ensues, the pulsewidth of which can be related to the sample absorptivity by a simple algorithm or calibration curve. A minimum detection limit of less than 10.sup.-5 cm.sup.-1 has been demonstrated using this technique.
REFERENCES:
Andrews, C. L., Optics of the Electromagnetic Spectrum, Prentice-Hall Inc., 1960, pp. 352-355.
Gordon et al., "Long-Transient Effects in Lasers with Inserted Liquid Samples" J. Appl. Phys. 36, 3 (1965).
Cremers et al., Abstract WJ6 in the Advance Program for the Conference on Lasers and Electro-Optics (CLEO '81), Washington, DC, Jun. 10-12, 1981.
Solimini, D., "Accuracy & Sensitivity of the Thermal Lens Method for Measuring Absorption", Applied Optics, vol. 5, No. 12, (Dec. 1966), pp. 1931-1939.
Dovichi et al., "Time-Resolved Thermal Lens Calorimetry", Analyt Chem., vol. 53 (1981), pp. 106-109.
Jackson et al., "Photothermal Deflection Spectroscopy and Detection" Applied Optics, vol. 20, No. 8, (Apr. 15, 1981), pp. 1333-1344.
Cremers David A.
Keller Richard A.
Freund Samuel M.
Gaetjens Paul D.
Hightower Judson R.
Rosenberger R. A.
The United States of America as represented by the United States
LandOfFree
Apparatus and method for measurement of weak optical absorptions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for measurement of weak optical absorptions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for measurement of weak optical absorptions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1439325