EMIR optomechanics

Barrera, S.; Villegas, Alejandro; Calvo Fuentes, Javier; Correa, Santiago; Moreno, Jaime A.; Redondo, Pablo Quinzá; Restrepo, René; Sánchez, Vicente Raúl Pérez; Tenegi, F.; Garzón, F.; Patrón, J.

doi:10.1117/12.550463

Cited by 7 publications

(3 citation statements)

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“…After finalising a prototyping phase in which the most critical aspects of the mechanical concept have being tested and qualified, EMIR is now entering into the fabrication and AIV phase. The full details of the mechanical design can be found in the reference list 7,8,9,10 . The EMIR mechanical desing relays on the development of a fully cryogenic robotic system which can be remotely reconfigured to form the multi-slit pattern in the instrument focal plane, and which is referred to as CSU along this paper.…”

Section: Mechanical Conceptmentioning

confidence: 99%

EMIR: the GTC NIR multi-object imager-spectrograph

Garzón¹,

Rodríguez²,

Ordóñez³

et al. 2006

SPIE Proceedings

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EMIR, currently entering into its fabrication and AIV phase, will be one of the first common user instruments for the GTC, the 10 meter telescope under construction by GRANTECAN at the Roque de los Muchachos Observatory (Canary Islands, Spain). EMIR is being built by a Consortium of Spanish and French institutes led by the Instituto de Astrofísica de Canarias (IAC). EMIR is designed to realize one of the central goals of 10m class telescopes, allowing observers to obtain spectra for large numbers of faint sources in an time-efficient manner. EMIR is primarily designed to be operated as a MOS in the K band, but offers a wide range of observing modes, including imaging and spectroscopy, both long slit and multiobject, in the wavelength range 0.9 to 2.5 µm. It is equipped with two innovative subsystems: a robotic reconfigurable multislit mask and disperssive elements formed by the combination of high quality difracction grating and conventional prisms, both at the heart of the instrument. The present status of development, expected performances, schedule and plans for scientific exploitation are described and discussed. The development and fabrication of EMIR is funded by GRANTECAN and the Plan Nacional de Astronomía y Astrofísica (National Plan for Astronomy and Astrophysics, Spain).

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Section: Mechanical Conceptmentioning

confidence: 99%

EMIR: the GTC NIR multi-object imager-spectrograph

Garzón¹,

Rodríguez²,

Ordóñez³

et al. 2006

SPIE Proceedings

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“…Additionally, it includes two filter wheels with three wide and three narrow filters in the J, H, and K bands. The instrument's thermal and detector control software is adapted from EMIR (Espectrógrafo Multiobjeto Infrarrojo) including its highlevel operation [8], [9]. This camera is designed to capture NIR diffraction-limited images and carry out the acceptance testing of the entire AO system, which currently utilizes a provisional test camera [10].…”

Section: Introductionmentioning

confidence: 99%

GRANCAIN: the first light infrared camera for GTCAO: end-to-end optical design, integration, and verification

Canto-Caño,

Delgado-Hernández,

Ganzález-Carretero

et al. 2024

Optical Instrument Science, Technology, and Applications III

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The Gran Telescopio de Canarias Adaptive Optic System (GTCAO) is built to provide nearly diffraction-limited images to GTC. GRANCAIN (GRAN CAmara INfrarroja) is the first light cryogenic imaging instrument in J, H, and K infrared bands, which will be integrated into the Nasmyth focus of GTCAO. The instrument is designed to image the NIR (Near-Infrared) diffraction limit for a field of view of 22x22 arcsec operating up to conditions of 1.5 arcsec and zenithal distances up to 60 deg. The instrument has a telecentric optical design based on a collimator camera with a 2:1 magnification, with a cold stop, and the filters between with an infrared detector everything inside the cryostat for operating at 50 K. This article presents a comprehensive overview of the end-to-end optical design of GRANCAIN. It explores the selection criteria for diverse commercial elements, conducts thermal analysis utilizing Ansys Zemax OpticStudio, and delineates the acceptance tests performed at the IAC. The article also encompasses tolerance analysis using Ansys Zemax OpticStudio and establishing the error budget. Furthermore, the text provides a detailed account of the alignment process, achieved through the mechanical positioning of each optical element with a laser tracker and the confirmation of positions under cryogenic conditions is conducted using an alignment telescope. Lastly, the article discusses the optical acceptance plans for the instrument before its integration into GTCAO.

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“…The EMIR mechanical design 13,14,15,16 relays on the development of a fully cryogenic robotic system which can be remotely reconfigured to form the multi-slit pattern in the instrument focal plane, the CSU, which has been subject to a development and manufacturing contract and is pending of its final acceptance at the IAC, which should happen in the forthcoming weeks. Several functional prototypes have been produced along during the development phase, which has been tested intensively to optimize the concept.…”

Section: Optomechanical Layoutmentioning

confidence: 99%

Results of the verification of the NIR MOS EMIR

et al. 2014

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EMIR is one of the first common user instruments for the GTC, the 10 meter telescope operating at the Roque de los Muchachos Observatory (La Palma, Canary Islands, Spain). EMIR is being built by a Consortium of Spanish and French institutes led by the Instituto de Astrofísica de Canarias (IAC). EMIR is primarily designed to be operated as a MOS in the K band, but offers a wide range of observing modes, including imaging and spectroscopy, both long slit and multiobject, in the wavelength range 0.9 to 2.5 μm. This contribution reports on the results achieved so far during the verification phase at the IAC prior to its shipment to the GTC for being commissioned, which is due by mid 2015. After a long period of design and fabrication, EMIR finally entered into its integration phase by mid 2013. Soon after this, the verification phase at the IAC was initiated aimed at configuring and tuning the EMIR functions, mostly the instrument control system, which includes a sophisticated on line data reduction pipeline, and demonstrating the fulfillment of the top level requirements. We have designed an ambitious verification plan structured along the three kind of detectors at hand: the MUX and the engineering and scientific grade arrays. The EMIR subsystems are being integrated as they are needed for the purposes of the verification plan. In the first stage, using the MUX, the full optical system, but with a single dispersive element out of the three which form the EMIR suite, the two large wheels mounting the filters and the pseudo-grisms, plus the detector translation unit holding the MUX, were mounted. This stage was mainly devoted to learn about the capabilities of the instrument, define different settings for its basic operation modes and test the accuracy, repeatability and reliability of the mechanisms. In the second stage, using the engineering Hawaii2 FPA, the full set of pseudo-grisms and band filters are mounted, which means that the instrument is fully assembled except for the cold slit unit, a robotic reconfigurable multislit mask system capable of forming multislit pattern of 55 different slitlets in the EMIR focal plane. This paper will briefly describe the principal units and features of the EMIR instrument as the main results of the verification performed so far are discussed. The development and fabrication of EMIR is funded by GRANTECAN and the Plan Nacional de Astronomía y Astrofísica (National Plan for Astronomy and Astrophysics, Spain).

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EMIR optomechanics

Cited by 7 publications

References 0 publications

EMIR: the GTC NIR multi-object imager-spectrograph

EMIR: the GTC NIR multi-object imager-spectrograph

GRANCAIN: the first light infrared camera for GTCAO: end-to-end optical design, integration, and verification

Results of the verification of the NIR MOS EMIR

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