Temperature-dependent refractive index models for BaF2, CaF2, MgF2, SrF2, LiF, NaF, KCl, ZnS, and ZnSe

Tropf, William J.

doi:10.1117/12.201666

Cited by 79 publications

(31 citation statements)

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“…For example, taking [10], [9]. After deciding on the thin film material, one need to optimize the design by setting N 1 = 2.7, N 11 = 1.4 in equation 7, and iterating again to find the values for ζ1 and ζ11.…”

Section: Resultsmentioning

confidence: 99%

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Phase retarders for optical communications (C-band & L-band)

Habli

Abdul-Nabi

2013

2013 Saudi International Electronics, Communications and Photonics Conference

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Section: Resultsmentioning

confidence: 99%

“…where, r ijv are the Fresnel reflection coefficients [9] of the ij interface for the v plarization (v=p or s), and…”

Section: Problem Statementmentioning

confidence: 99%

Phase retarders for optical communications (C-band & L-band)

Habli

Abdul-Nabi

2013

2013 Saudi International Electronics, Communications and Photonics Conference

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“…The indices of refraction for CaF 2 were calculated by applying the temperature-dependent refractive index model of Tropf (1995). This model adds temperature-dependent terms to the common Sellmeier (1871) dispersion formula and successfully reproduces the measured temperature-dependent dispersion for CaF 2 (among other materials).…”

Section: Appendix Cryogenic Indices Of Refraction For the Glasses Usedmentioning

confidence: 99%

FourStar: The Near-Infrared Imager for the 6.5 m Baade Telescope at Las Campanas Observatory

Persson¹,

Murphy²,

Smee³

et al. 2013

Publications of the Astronomical Society of the Pacific

107

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ABSTRACT. The FourStar Infrared Camera is a 4 K × 4 K near-infrared (1.0-2.4 μm) imager built for the Magellan 6.5 m Baade Telescope at Las Campanas Observatory, Chile. FourStar has an all-refractive optical system, four HAWAII-2RG detectors, and Teledyne electronics. The pixel scale of 0:159″ pixel À1 produces a 10:8 0 × 10:8 0 field of view. Ten filters are available across the Y , J, H, and K s bands. We present the optical, mechanical, thermal, electronic, and software design choices and their associated engineering implementations. The detector readout electronics, control system, and the automatic data acquisition hardware are also described. Laboratory and onsky performance data are presented. FourStar has excellent image quality, easily meeting the requirement of critically sampling the median seeing disk. The throughput is ≈0:5-0:6 across its wavelength coverage. Some early science results are presented.

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“…When cooled from room temperature, refractive indices decrease and materials contract. Designing at cryogenic temperature thus required the creation of a glass catalog containing cryogenic glass dispersion data obtained from known models 12,13 . At the final design stage, the lens elements are scaled ("heated up") gradually using adequate coefficients of thermal expansion, in order to determine the lens prescription at room temperature for manufacturing.…”

Section: Cpapir a Cryogenic Nir Cameramentioning

confidence: 99%

Optical design and tolerances of wide-field imagers for astronomical survey

Thibault¹,

Lacoursière

Doucet

et al. 2003

SPIE Proceedings

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We present three designs and tolerances of wide-field imagers (30×30 arc-minutes or larger) for astronomical surveying. Two infrared cameras (CPAPIR and PANORAMIX II) were designed for the 0.8-2.4 µm band and a third one (WIRCAM) for the visible and near-infrared band extending from 410 nm to 950 nm. The cameras are installed on the telescopes of the Canada-France-Hawaii (Hawaii, USA) and Mont Mégantic Observatories (Québec, Canada). The three cameras are compact, use only spherical refractive components and have an internal pupil accessible for insertion of filtering components. A Lyot stop must be used in the infrared camera for background rejection. For PANORAMIX II, a set of filters is used at the internal pupil. Correction of the large off-axis aberrations generated by the telescopes, wide spectral coverage, material choices, cryogenic temperature and alignment were the main design challenges. Also, tolerancing was particularly critical for the infrared cameras because they are cryogenically cooled, thus forbidding adjustment of internal components.The cameras' theoretical performances are presented in terms of point-spread function, encircled energy and distortion.

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Temperature-dependent refractive index models for BaF2, CaF2, MgF2, SrF2, LiF, NaF, KCl, ZnS, and ZnSe

Cited by 79 publications

References 0 publications

Phase retarders for optical communications (C-band & L-band)

Phase retarders for optical communications (C-band & L-band)

FourStar: The Near-Infrared Imager for the 6.5 m Baade Telescope at Las Campanas Observatory

Optical design and tolerances of wide-field imagers for astronomical survey

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Temperature-dependent refractive index models for BaF2, CaF2, MgF2, SrF2, LiF, NaF, KCl, ZnS, and ZnSe

Cited by 79 publications

References 0 publications

Phase retarders for optical communications (C-band &amp; L-band)

Phase retarders for optical communications (C-band &amp; L-band)

FourStar: The Near-Infrared Imager for the 6.5 m Baade Telescope at Las Campanas Observatory

Optical design and tolerances of wide-field imagers for astronomical survey

Contact Info

Product

Resources

About

Phase retarders for optical communications (C-band & L-band)

Phase retarders for optical communications (C-band & L-band)