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Optical Engineering • Open Access

Cryogenic application of an autocentering mount working at the diffraction limit
Author(s): Beatriz S. Sánchez; Ana Carolina Keiman; Jorge Fuentes-Fernández; Salvador Cuevas Cardona; Carlos Espejo; Oscar Chapa; Rubén A. Flores-Meza; Luis Carlos Álvarez-Núñez; Gerardo Lara; José Leonardo Garcés Medina

Paper Abstract

We present the design concept and validation of a cryogenic lens mount for a noncemented doublet for the near-infrared diffraction limited instrument FRIDA. The design uses an autocentering mount that maintains the relative alignment of the lenses, acting against any displacement that may be induced by external forces by automatically returning the lenses to their nominal positions. Autocentering techniques have been used for instruments at room temperature with relatively relaxed image quality requirements. We present in detail its application to a mount for a cryogenic instrument working at the diffraction limit. The design has been tested on the collimator of FRIDA, a noncemented doublet of CaF 2 and S-FTM16. We describe the alignment requirements of the system, and we show the calculations that ensure that the lenses will suffer both appropriate stresses and temperature differences. We present the experimental validation of a prototype, demonstrating that the design delivers an excellent performance without inducing unnecessary stresses on the optical components, provided that the lenses are previously aligned with very high precision.

Paper Details

Date Published: 24 March 2017
PDF: 10 pages
Opt. Eng. 56(3) 034114 doi: 10.1117/1.OE.56.3.034114
Published in: Optical Engineering Volume 56, Issue 3
Show Author Affiliations
Beatriz S. Sánchez, Univ. Nacional Autónoma de México (Mexico)
Ana Carolina Keiman, Univ. Nacional Autónoma de México (Mexico)
Jorge Fuentes-Fernández, Univ. Nacional Autónoma de México (Mexico)
Salvador Cuevas Cardona, Univ. Nacional Autónoma de México (Mexico)
Carlos Espejo, Univ. Nacional Autónoma de México (Mexico)
Oscar Chapa, Univ. Nacional Autónoma de México (Mexico)
Rubén A. Flores-Meza, Univ. Nacional Autónoma de México (Mexico)
Luis Carlos Álvarez-Núñez, Univ. Nacional Autónoma de México (Mexico)
Gerardo Lara, Univ. Nacional Autónoma de México (Mexico)
José Leonardo Garcés Medina, Univ. Nacional Autónoma de México (Mexico)


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