Thermal measuring and testing – Calorimetry – Total radiant energy or power measurement
Patent
1982-03-23
1983-11-08
Goldstein, Herbert
Thermal measuring and testing
Calorimetry
Total radiant energy or power measurement
G01J 502, G01K 1700
Patent
active
044139160
ABSTRACT:
There is provided a method and apparatus for determining the power output of a laser for wavelengths which are substantially fully absorbed by water, such as the wavelengths produced by carbon dioxide lasers. A rotary member defines a surface of revolution which widens away from an opening to a free edge, with the opening being located substantially at the axis of the surface. Means are provided for rotating a member about its axis, and water is brought to the surface through the opening, to form a film running to the free edge. Means are provided for collecting water at the free edge, and the water through-put is measured by suitable means. Further means are provided for measuring the water temperature differential arising due to absorbable radiation falling upon the water as it runs over the surface, and on the basis of the throughput and the temperature differential, the absorbed power, and hence the output of the laser in the wavelength region in question, can be calculated. For CO.sub.2 lasers substantially all of the radiation is in the region which is fully absorbed by water, and thus the apparatus and method provided herein are ideal for measuring the power output of lasers of this kind.
REFERENCES:
patent: 3464267 (1969-09-01), Ehrlich et al.
patent: 3918303 (1975-11-01), Zakhidov et al.
patent: 4037470 (1977-07-01), Mock et al.
patent: 4301680 (1981-11-01), Lunev et al.
Emmony et al., "An absolute calorimeter for the measurement of CO.sub.2 laser power" in Journal of Physics E, vol. 9, #8, 8/76, pp. 621-622.
Goldstein Herbert
Majestic Contractors Limited
LandOfFree
Power meter for lasers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power meter for lasers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power meter for lasers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2005388