document title / titre du document TRP W ORK PLAN ... - emits - ESA

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TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 TRP Reference: Title: T609-17MM Programmable optoelectronic adaptive lens Production of a lightweight, single element lens, consisting of a liquid crystal or electrochromic plate, dynamically controllable, to produce the desired optical refracting properties. Useful in many instruments normally requiring heavy, multi-element lens systems, and capable of varying optical properties on command. This device would be particularly relevant for microsats and nanosats. This activity will study, analyse and then design and manufacture a liquid crystal or electrochromic plate, with a matrix of addressable pixels or rings, allowing the localised and programmable variation of refractive effect or the generation of Fresnel zones. In this way, any desired effective refractive behaviour profile can be generated, in a somewhat similar manner to a Fresnel lens. This would permit the emulation of various types of lens systems within a very lightweight and compact optical assembly. Variation in the optical properties of the lens would also be possible on a dynamic basis. The device could also serve as an adjustable attenuator for sources of differing brightness. Testing, characterisation and analysis would then follow, to allow a clear assessment of how to proceed for future development in this technology. Deliverables: Optoelectronic lens demonstrator. Current TRL: - Target TRL: TRL2 Application Need/Date: TRL5 >= 2010 Application/Mission: all optical missions Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-7855 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. Page 189 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 TRP Reference: Title: T609-23MM Programmable micro-diffraction gratings Programmable micro-diffraction gratings (PMDG) are on-chip-manufactured optical devices using micro-electro-mechanical system (MEMS) technology. Optical MEMS (MOEMS) devices are based on movable micrometric optical components and therefore provide large benefits in terms of mass, speed, low power consumption, size and ruggedness. In addition they have the potential to be available at low cost, since complete systems can be produced using essentially standard technologies of the semiconductor industry. Basically, a PMDG device consists of a one-dimensional array of very thin and flat optical mirrors (100’s of micromirrors) whose vertical position can be electrically controlled (e.g. by electrostatic actuation). By adjusting all the relative mirror positions a grating can be generated for diffracting the incident light into a selected angle with any desired spectral response. For example, they can be adjusted to form a blazed grating or to match the absorption or emission spectrum of a molecule. A new type of extremely compact correlation spectrometers, very promising for Earth Observation and Science Exploration missions, can be built. Only one single photo detector is needed to build the spectrometer, which is a great advantage compared to fixed grating spectrometers requiring a detector - array. Since the mirrors can be moved in less than 0.1 ms, many different spectral responses can be generated in a short time period. Moreover, a PMDG device is reconfigurable (i.e. the optical transfer function is programmable), allowing the target species to be changed by remote control, which makes this device concept ideal for planetary exploration. PMDG can provide elegant solutions to a huge variety of spectroscopy applications (e.g. detection/identification of chemical species), hence enabling new Earth Observation and Science Exploration missions, e.g. for spectroscopy instruments on-board microsatellites, nanosatellites, micro-aerobots and micro-probes, envisaged for some of the Science & Planetary Exploration reference missions (TRM) like JEM (Jupiter Explorer Mission), IHP (Interstellar Heliopause Probe) and VEP (Venus Entry Probe). The development of this “enabling technology” will ensure a strategic leadership in competitiveness and independence to Europe. The objective of this activity is to design, develop and manufacture in Europe programmable micro-diffraction grating (PMDG) devices for spectroscopy applications and to deliver a proof-of-concept demonstrator of such a device, which shall be subjected to a functional performance verification test campaign for the on ground validation of the selected concept, with the goal of demonstrating the functional requirements (e.g. spectral resolution) and the expected improvements in terms of mass, size and power consumption. The Contractor shall also investigate environmental, reliability and packaging issues to support future space qualification stages. PMDG devices are presently commercially available in the USA as well as in Japan. The TRP activity “Instrument concepts using dynamic diffraction gratings, T609-05MM”, assesses experimentally the performance and capabilities of PMDG devices procured in USA and investigate novel instrument concepts based on PMDG device technology. The outcomes of this activity will be used for the proposed PMDG development activity. Deliverables: Technology data package; Executive summary report; Modelization tools (mathematical/numerical computer models); Samples and Proof-of-concept demonstrator of PMDG's for spettroscopy applications. Current TRL: TRL1-2 Target TRL: TRL3 Application Need/Date: TRL5 by 2011 Application/Mission: Small EO missions, planetray research Contract Duration: 24 months SW Clause : - Dossier0 Ref.: T-7861 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. Page 190 of 227
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