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A common-path interferometer is a class of interferometers in which the reference beam and sample beams travel along the same path. Examples include the Sagnac interferometer, Zernike phase-contrast interferometer, and the point diffraction interferometer. A common-path interferometer is generally more robust to environmental vibrations than a ...
While the Huygens' principle of double refraction explains the phenomenon of double refraction in an optically anisotropic medium, the Huygens–Fresnel principle pertains to the propagation of waves in an optically isotropic medium. [3] [4] According to the Huygens–Fresnel principle, each point on a wavefront can be considered a secondary ...
Amici prism. An Amici prism, named for the astronomer Giovanni Battista Amici, is a type of compound dispersive prism used in spectrometers. The Amici prism consists of two triangular prisms in contact, with the first typically being made from a medium-dispersion crown glass, and the second from a higher-dispersion flint glass.
Double Vision (Foreigner song) " Double Vision " is a single by Foreigner from their second album of the same name. The song reached No. 2 on the Billboard Hot 100 chart for two weeks in 1978, behind "MacArthur Park" by Donna Summer. [3] It became a gold record. The song was also a top 10 hit in Canada.
Double Vision is the second studio album by the British-American rock band Foreigner, released on 20 June 1978 by Atlantic Records. Recorded between December 1977 and March 1978, it was Foreigner's only album co-produced by Keith Olsen and the last recording with bass guitarist Ed Gagliardi who would be later replaced by Rick Wills .
Lenticular lenses are sometimes used as corrective lenses for improving vision. A bifocal lens could be considered a simple example. Lenticular eyeglass lenses have been employed to correct extreme hyperopia (farsightedness), a condition often created by cataract surgery when lens implants are not possible.