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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 11, Iss. 4 — Apr. 1, 1972
  • pp: 844–848

Apparatus for Measuring the Thermal Expansion of Optical Materials from 30°C to 250°C

John F. Ebersole, Stanley S. Ballard, and James Steve Browder  »View Author Affiliations


Applied Optics, Vol. 11, Issue 4, pp. 844-848 (1972)
http://dx.doi.org/10.1364/AO.11.000844


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Abstract

An apparatus has been designed and constructed for measuring the coefficient of linear thermal expansion in the 30–250°C temperature range for samples as small as 13 mm in length and 6 mm in diameter. Similarities between this apparatus and one previously built for measurements from room temperature down to 10 K are reviewed; important modifications appropriate to the high temperature range are discussed in detail. Measurements were made at 25°C intervals on two infrared-transmitting optical materials: polycrystalline cadmium sulfide (Eastman Kodak Co.) and chalcogenide glass 20, composition Ge33Se55As12 (Texas Instruments, Inc.). Measurements were also made on a sample of Corning crown glass 8263; the results are compared with Corning data. Finally, it is shown that the thermal expansion coefficients determined with this high temperature apparatus are compatible with those obtained with the above-mentioned low temperature device.

© 1972 Optical Society of America

History
Original Manuscript: September 3, 1971
Published: April 1, 1972

Citation
John F. Ebersole, Stanley S. Ballard, and James Steve Browder, "Apparatus for Measuring the Thermal Expansion of Optical Materials from 30°C to 250°C," Appl. Opt. 11, 844-848 (1972)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-11-4-844

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