Optical tests of thin plastic films
1992; Institute of Physics; Volume: 104; Linguagem: Inglês
10.1086/133114
ISSN1538-3873
AutoresE. F. Borra, Robert Content, Claude Delisle, Jean‐François Gauvin,
Tópico(s)Optical and Acousto-Optic Technologies
ResumoWe have studied the optical characteristics of several plastic films. Interferometry of large (1.4-m diameter) and small (10 cm) samples shows that thin polyester (Mylar) films have RMS wavefront deviations small enough ( Lambda/20 Optical Path Difference) that they are essentially diffraction limited. Although they introduce scattered light, it is less than the scattered light from a glass mirror and the atmosphere. Mylar is strongly birefringent, a serious inconvenience for measurements of polarized light. Besides scattering light, Mylar absorbs and reflects light and spectrally modulates it with small ripples to a Fabry-Perot effect.
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