Mechanical Slit Mask Mechanism Breadboard for the MOSFIRE instrument of the KECK Telescope Spectrometer

Onillon, E.; Theurillat, P.; O'Hare, Aidan; Spanoudakis, Peter; Schwab, Philippe; Giriens, Laurent

doi:10.1109/aim.2007.4412404

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, multi-aperture telescopes or segmented telescopes don't have those limitations. Since the building of 10 m segmented telescope Keck [3], [4] in 1991 at Hawaii, many segmented systems have been built or are under construction, such as the El Gran Telescopio de Canarias (GTC) [5] with a 10.4 m diameter and 36 segments at La Palma Island, the James Webb Space Telescope (JWST) [6] with a 6.5 m diameter and 18 segments deployable primary mirror, the Thirty Meter Telescope (TMT) [7] with a 30 m diameter and 492 segments, and the European Extremely Large Telescope (E-ELT) [8] with a 39 m diameter and 798 segments in Paranal. In a segmented telescope, the primary mirror is created by splicing an array of actuated hexagonal segmented mirrors together, which makes it easier to fabricate than the monolithic mirror of equivalent size in a monolithic mirror telescope.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Multispectral Piston Sensing Technology

Dong

et al. 2019

IEEE Photonics J.

View full text Add to dashboard Cite

Nowadays giant segmented telescopes and multiaperture telescopes have grown out of the quest for high-resolution observations in astronomy. One of the major issues is the phasing of such telescopes. A concept of multispectral piston sensing technology is, therefore, reexamined and studied experimentally for the first time. Based on the phase-shifting "Telescope-Interferometer" technology and multispectral information, the multispectral piston sensing technology was assumed to be feasible with the segmented telescopes and multiaperture telescopes. In this paper, the optical scheme for this method has been designed and realized. Experimental tests have been carried out and demonstrated that the method is effective for piston sensing in a large capture range with high-precision despite some instrument-related limitations that can be eliminated. In our tests, the shortest coherent length of the three working spectrums we chose was less than 17.5 μm. Results show that the method successfully handled an amplitude of correction of about ±8 μm with an accuracy of about λ/30 (λ = 535 nm) RMS in our tests, and we can foresee that the capture range can be enlarged if we choose working spectrums with larger coherent lengths.

show abstract