TY - JOUR
T1 - Visible and near-infrared laboratory demonstration of a simplified pyramid wavefront sensor
AU - Lozi, Julien
AU - Jovanovic, Nemanja
AU - Guyon, Olivier
AU - Chun, Mark
AU - Jacobson, Shane
AU - Goebel, Sean
AU - Martinache, Frantz
N1 - Funding Information:
The development of SCExAO was supported by the Japan Society for the Promotion of Science (Grant-in-Aid for Research #23340051, #26220704, and #23103002), the Astrobiology Center of the National Institutes of Natural Sciences, Japan, the Mt. Cuba Foundation and the director’s contingency fund at Subaru Telescope. F.M.’s work is supported by the ERC award CoG—683029. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Facilities: Subaru Telescope, NAOJ.
Publisher Copyright:
© 2019. The Astronomical Society of the Pacific.
PY - 2019/4
Y1 - 2019/4
N2 - Wavefront sensing and control are important for enabling one of the key advantages of using large apertures, namely higher angular resolution. Pyramid wavefront sensors are becoming commonplace in new instrument designs owing to their superior sensitivity. However, one remaining roadblock to their widespread use is the fabrication of the pyramidal optic. This complex optic is challenging to fabricate due to the pyramid tip, where four planes need to intersect at a single point. Thus far, only a handful of these have been produced due to the low yields and long lead times. To address this, we present an alternative implementation of the pyramid wavefront sensor which relies instead on two roof prisms. Such prisms are easy and inexpensive to source. We demonstrate the successful operation of the roof prism pyramid wavefront sensor on an 8 m class telescope, at visible and near-infrared wavelengths, for the first time using a SAPHIRA HgCdTe detector without modulation for a laboratory demonstration, and elucidate how this sensor can be used more widely on wavefront control test benches and instruments.
AB - Wavefront sensing and control are important for enabling one of the key advantages of using large apertures, namely higher angular resolution. Pyramid wavefront sensors are becoming commonplace in new instrument designs owing to their superior sensitivity. However, one remaining roadblock to their widespread use is the fabrication of the pyramidal optic. This complex optic is challenging to fabricate due to the pyramid tip, where four planes need to intersect at a single point. Thus far, only a handful of these have been produced due to the low yields and long lead times. To address this, we present an alternative implementation of the pyramid wavefront sensor which relies instead on two roof prisms. Such prisms are easy and inexpensive to source. We demonstrate the successful operation of the roof prism pyramid wavefront sensor on an 8 m class telescope, at visible and near-infrared wavelengths, for the first time using a SAPHIRA HgCdTe detector without modulation for a laboratory demonstration, and elucidate how this sensor can be used more widely on wavefront control test benches and instruments.
KW - Adaptive Optics
KW - Astronomical instrumentation
KW - Extrasolar Planets
KW - High-contrast Imaging
KW - Pyramid Wavefront Sensor
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U2 - 10.1088/1538-3873/ab046a
DO - 10.1088/1538-3873/ab046a
M3 - Article
AN - SCOPUS:85065637105
VL - 131
JO - Publications of the Astronomical Society of the Pacific
JF - Publications of the Astronomical Society of the Pacific
SN - 0004-6280
IS - 998
M1 - 044503
ER -