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Charles E. Woodward

First light with ALES: A 2-5 micron adaptive optics Integral Field Spectrograph for the LBT
Skemer, Andrew J.; Hinz, Philip; Montoya, Manny; Skrutskie, Michael F.; Leisenring, Jarron; Durney, Oli; Woodward, Charles E.; and 5 coauthors, SPIE

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ntegral field spectrographs are an important technology for exoplanet imaging, due to their ability to take spectra in a high-contrast environment, and improve planet detection sensitivity through spectral differential imaging. ALES is the first integral field spectrograph capable of imaging exoplanets from 3-5 μm, and will extend our ability to characterize self-luminous exoplanets into a wavelength range where they peak in brightness. ALES is installed inside LBTI/LMIRcam on the Large Binocular Telescope, taking advantage of existing AO systems, camera optics, and a HAWAII-2RG detector. The new optics that comprise ALES are a Keplerian magnifier, a silicon lenslet array with diffraction suppressing pinholes, a direct vision prism, and calibration optics. All of these components are installed in filter wheels making ALES a completely modular design. ALES saw first light at the LBT in June 2015.