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Effect of the optical-system aperture on measurements in thermophysical research

✍ Scribed by E. N. Shestakov; L. N. Latyev; V. Ya. Chekhovskoi

Publisher
Springer US
Year
1978
Tongue
English
Weight
443 KB
Volume
21
Category
Article
ISSN
0543-1972

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## Abstract In this paper, we demonstrate a new technology in which we use the near infrared (NIR) electro‐optical device and projection method to measure the numerical aperture (NA) of NIR fiber. Using the optical coupler to let the NIR light enter into an optical fiber, the projection pattern is