Diseño preliminar de tres de los sistemas principales del Telescopio Solar Europeo: sistema del espejo primario (M1), la estructura del telescopio, pilar y cubierta (TS) y el espejo secundario adaptativo (M2) - Expediente de la Licitación: LIC-20-006

Preliminary design of the European Solar Telescope three main systems: the primary mirror assembly (M1), the telescope structure, pier and enclosure (TS), and the adaptive secondary mirror (M2) - Reference number: LIC-20-006 (courtesy translation) 

Link to the Tenders Electronic Daily (TED) publication: 


La licitación tiene tres lotes / The tender has three lots

Lote 1: Diseño preliminar del sistema del espejo primario (M1) del Telescopio Solar Europeo

Lot 1: Preliminary design of the primary mirror assembly (M1) of the European Solar Telescope (courtesy translation) 

M1 - Green


Lote 2: Diseño preliminar de la estructura del telescopio, pilar y cubierta (TS) del Telescopio Solar Europeo

Lot 2: Preliminary design of the telescope structure, pier and enclosure (TS) of the European Solar Telescope (courtesy translation) 



 Telescope Structure - Red      Pier - Green      Enclosure - Orange


Lote 3: Diseño preliminar del sistema del espejo secundario adaptativo (M2) del Telescopio Solar Europeo

Lot 3: Preliminary design of the adaptive secondary mirror (M2) of the European Solar Telescope (courtesy translation) 


M2 - Green  



The procurement documents are available for unrestricted and full direct access, free of charge, at:

Tender's Documents

Tenders or requests to participate must be submitted also to the above-mentioned link. Electronic communication requires the use of tools and devices that are not generally available. Unrestricted and full direct access to these tools and devices is possible, free of charge, at:

Contractor's Profile

DEADLINE: August 7th 2020 - 23:59 Local Time

Any additional information regarding the call for tenders, must be requested to the official e-mail address: This email address is being protected from spambots. You need JavaScript enabled to view it.






Deformable Mirrors Call for Tender (CLOSED)

A public call for tenders for the acquisition of three deformable mirrors (DM) for the MCAO demonstration bank (650,000 €) has been recently published throught the official Tenders Portal of the INSTITUTO DE ASTROFÍSICA DE CANARIAS.

The European Solar Telescope (EST) will be equipped with an MCAO system to provide excellent image correction within a one-arcminute field. A demonstrator of solar MCAO with similar requirements as the EST is being designed at IAC headquarters.

This bench will test new and existing concepts for solar MCAO, as, e.g., the integration of neuronal networks in the reconstruction process.

The next figure shows the technical concept of the bench in one of the several configurations possible.

  • A high-resolution image of the Sun will be created and perturbed by a turbulence simulator with different phase screens placed at different heights.
  • MCAO correction will be performed by
    • DM0: one pupil DM
    • DM1 and DM2: two altitude DMs.
  • Two wide-field wavefront sensors (LOWFS, HOWFS) will be used to perform the tomography.
  • A scientific camera will evaluate the performance within a one-arcminute field.

The bench is currently under construction. Construction and alignment of the system is expected to be finished in the coming year, though first results from completed modules will be available sooner.

The currrent public tender announcement is related to the acquisition of the three deformable mirrors mentioned above (DM0, DM1 and DM2). The available budget for purchasing the three items is 650.000 €.

Candidates shall submit their proposals before 19 September 2019.

All the relevant documentation can be found at IAC's Tenders Portal.


Procurement Rules


The EST Project Office has prepared the following document aimed at advancing information to companies and other organizations that might be interested in applying to the procurement calls foreseen in PRE-EST and in other EST related projects.

The procurement rules were prepared in agreement with Directive 2014/24/EU of the European Parliament and of the Council of 26 February 2014 on public procurement, and with the corresponding Spanish law on Public Procurement (Ley 9/2017, de Contratos del Sector Público).

More details: EST Procurement Rules.