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Proceedings Paper

Ronchi test for refractive optics off-axis using a nodal bench
Author(s): F. S. Granados-Agustin; M. E. Percino Zacarías; J. F. Escobar-Romero; Agustín Santiago Alvarado
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Paper Abstract

When evaluate the quality of the optical systems using the Ronchi test [1], the source and Ronchi ruling should be placed on the axis systems. In order to know the quality of the system in off-axis, we propose use the nodal optical bench. In particularly we use the principal property of this instrument, its consists when we mounted the refractive system in a rotating mount and his mechanical axis coincide with nodal point, we can rotated about the nodal point then the focal point of systems does not have any movement in a focal plane. So, now we can put a Ronchi ruling in the exit pupil and observe the pattern of fringes, without movement of the source and the ruling. For this, we placed the CCD camera in the focal plane of the refractive system and focused in the exit pupil; the principal advantage of this proposal is test the system without auxiliary optics. For implemented this options we use a simple optical system, one positive singlet lens. In particularly the lens are rotated 4, 12, 16, 20, 24, 28 and 32 degrees. In the optical setup we use a Ronchi ruling of 20 lines/inch, 50 lines/inch and 200 lines/inch in each case.

Paper Details

Date Published: 23 May 2011
PDF: 8 pages
Proc. SPIE 8083, Modeling Aspects in Optical Metrology III, 80830S (23 May 2011); doi: 10.1117/12.889287
Show Author Affiliations
F. S. Granados-Agustin, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
M. E. Percino Zacarías, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
J. F. Escobar-Romero, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Agustín Santiago Alvarado, Univ. Tecnológica de la Mixteca (Mexico)

Published in SPIE Proceedings Vol. 8083:
Modeling Aspects in Optical Metrology III
Bernd Bodermann, Editor(s)

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