1 March 2003 Aberration measurements and birefringence effects in gradient index rod relays
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Optical Engineering, 42(3), (2003). doi:10.1117/1.1539860
Abstract
In radial gradient index rods (GRIN rods) stress birefringence may appear due to the variation in chemical composition. This results in image degradation in addition to that produced by aberrations. We propose an interferometric method to evaluate the effects of birefringence and the aberrations at the same time. It uses the four-step phase stepping technique twice with two different polarizations of the reference beam. The resulting information consists of two phase maps, one containing information about the aberrations and the other about the birefringence effects given as a relative phase delay between the radial and azimuthal components of the test beam. The main feature is that this relative phase delay is evaluated locally over the aperture at the exit pupil.
Marcial Montoya, Daniel Malacara-Hernandez, Saul Almazan, "Aberration measurements and birefringence effects in gradient index rod relays," Optical Engineering 42(3), (1 March 2003). http://dx.doi.org/10.1117/1.1539860
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KEYWORDS
Birefringence

GRIN lenses

Polarization

Relays

Visibility

Gradient-index optics

Wavefronts

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