We propose to use current technologies to develop a servo actuator comprised central perhaps actuators can have cross electrodes
Tunable Filter Technologies for 30-m telescopes 2. Statement of Opportunity [Describe the need for the technology development in a positive way, that is, by describing the opportunity that will be created by the technology. This could be in terms of scientific performance, cost reduction, risk reduction, schedule enhancement, operational advantage, etc. Spell out the benefits to current observatories and other proposed ELTs in addition to the benefits to GSMT.] Tunable filters provide spatially resolved, high quality photometric imaging limited only by the telescope’s capabilities. Unlike integral field units, TFs achieve this without dividing the wavefront and therefore reach much deeper diffuse light levels, while preserving the spatial and photometric integrity. Tunable filters have applications to all imaging modes proposed for CELT and GSMT, including MCAO, ExAO, GLAO and SCAO imaging. A tunable filter provides narrowband images of arbitrary bandpass at a wavelength selected from a broad spectral range. This mode can be coupled to charge shuffling in order to provide differential imaging between two bands of identical shape through the same optical train. The Taurus Tunable Filter (TTF) covers 370-1000nm in two stages with a blue and a red tunable device. The backup plan for differential narrowband imaging is to specify a large set of narrowband interference filters. |
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