Optics: measuring and testing – Sample – specimen – or standard holder or support
Reexamination Certificate
2005-08-09
2005-08-09
Stafira, Michael P. (Department: 2877)
Optics: measuring and testing
Sample, specimen, or standard holder or support
Reexamination Certificate
active
06927850
ABSTRACT:
Disclosed is an integrating sphere for measuring the diffuse reflectivity of material samples in the infrared. The sphere is disposed in an airtight vacuum chamber under an atmosphere that does not absorb in the infrared. The sphere has two positions at which a sample may be mounted, one on a rod at the sphere's center, another on the sphere's wall, each mounting position corresponding to two different modes of testing samples. The rod acts as a mounting pedestal for a center mounted sample, and is rotatably mounted about its elongate vertical axis so that the sample can rotate with the rod in a horizontal plane. The rod penetrates the sphere and the chamber, and terminates in a knob or handle by which the rod can be rotated to position the sample at a preselected angle. Adjacent to the position for wall mounting, there is a sample heater. This configuration allows one to measure diffuse reflectance of a sample as a function of incidence angle and temperature. In the center-mount configuration, the handle enables one to anglularly reposition a center mounted sample without the need to vent and replenish the chamber's atmosphere after each test.
REFERENCES:
patent: 3562524 (1971-02-01), Moore et al.
patent: 3902809 (1975-09-01), Sparks
patent: 4575252 (1986-03-01), Akiyama
patent: 4768390 (1988-09-01), Baker et al.
Snail, K., “Reflectometer design using nonimaging optics”, Appl. Optics, Dec. 15, 1987, vol. 26, No. 24, pp. 5326-332.
Gindele, K., Kohl, M., Mast, M. “Spectral reflectance measurements using an integrating sphere in the infrared”, Appl. Optics, Jun. 15, 1985, vol. 24, No. 12., pp. 1757-1760.
Hanssen, L., “Integrating-sphere system and method for absolute measurement of transmittance, reflectance . . . ”, Appl. Optics, 2001, vol. 40, No 19, pp. 3196-3204.
Chenault, D.B., Snail, K.A., Hanssen, L.M., “Improved integrating-sphere throughput with a lens and nonimaging concentrator”, Appl. Optics, 1995, vol. 34, No. 34, pp. 7959-7964.
Snail, K.A., Hanssen, L.M., “Integrating sphere designs with isotropic throughput”, Appl. Optics, 1989, vol. 28, No. 10, pp. 1793-1799.
Edwards, D.K., Gier, J.T., Nelson, K.E., Roddick, R.D., “Integrating sphere for imperfectly diffuse samples”, Applied Optics, vol. 51, 1960, pp. 1279-1288.
Committee on Colorimetry, “Physical Concepts: Radiant Energy and its Measurement”, J. Opt. Society of America, vol. 34, No. 4, Apr. 1944, pp. 183-218.
Snail, K. Carr, K., “Optical Design of an integrating sphere- FTS emissometer”, Viewgraphs SPIE Conference on Infrared, Adaptive, Synthetic Optical Sys, 1986, 17 pages.
Snail, K, Carr, K., “Optical Design of an integrating sphere-Fourier transform spectrophotometry FTS emissometer”, SPIE Proc. Infr., Adap., Syn. Opt Sys, 1986, V 634, pp. 75-83.
Carr Kevin F.
Snail Keith A.
Ferrett Sally A.
Karasek John J.
Miles Edward F.
Stafira Michael P.
The United States of America as represented by the Secretary of
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