PMID- 33649653
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210302
IS  - 1539-4794 (Electronic)
IS  - 0146-9592 (Linking)
VI  - 46
IP  - 5
DP  - 2021 Mar 1
TI  - Pyramid and Shack-Hartmann hybrid wave-front sensor.
PG  - 1045-1048
LID - 10.1364/OL.417305 [doi]
AB  - An ideal wave-front sensor (WFS) for an adaptive optics system prioritizes three 
      properties: high sensitivity, wide dynamic range, and a linear relationship 
      between the actual and estimated wave fronts. WFSs currently in operation can 
      claim superiority in only two of these properties. For example, the 
      Shack-Hartmann WFS (SHWFS) has a linear response and remains effective under 
      large aberrations, but its sensitivity to low spatial frequencies is limited 
      [Proc. SPIE5490, 1177 (2004)PSISDG0277-786X10.1117/12.550786]. The pyramid WFS 
      (PyWFS) [J. Mod. Opt.43, 289 (1996)JMOPEW0950-034010.1080/09500349608232742] can 
      also be operated in a linear control system [Opt. Express14, 11925 
      (2006)OPEXFF1094-408710.1364/OE.14.011925] and offers excellent sensitivity when 
      used with an unresolved beacon but saturates quickly in the presence of large 
      aberrations. The dynamic range can be extended by modulating the beacon about the 
      pyramid prism tip, but at the expense of its sensitivity. This Letter describes a 
      hybrid WFS (HyWFS) that combines the SHWFS and PyWFS, capturing the desirable 
      features of both. The optical design of the HyWFS mimics the appearance of an 
      unmodulated PyWFS with a lenslet array in the reimaged pupil planes. Spot 
      patterns in the style of a SHWFS are formed in all pupil images. Wave-front 
      estimates are calculated from the HyWFS's output using both conventional PyWFS 
      and SHWFS reconstruction methods. A cross-over algorithm chooses between the two 
      estimates to retain high sensitivity to low aberration and a robust capture 
      range.
FAU - Guthery, Charlotte E
AU  - Guthery CE
FAU - Hart, Michael
AU  - Hart M
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Lett
JT  - Optics letters
JID - 7708433
SB  - IM
EDAT- 2021/03/03 06:00
MHDA- 2021/03/03 06:01
CRDT- 2021/03/02 06:20
PHST- 2021/03/02 06:20 [entrez]
PHST- 2021/03/03 06:00 [pubmed]
PHST- 2021/03/03 06:01 [medline]
AID - 447833 [pii]
AID - 10.1364/OL.417305 [doi]
PST - ppublish
SO  - Opt Lett. 2021 Mar 1;46(5):1045-1048. doi: 10.1364/OL.417305.