Biomedical Engineering Reference
In-Depth Information
Incoming light
Aberrated wavefront
Woofer
Relay optics
Beam splitter
Corrected
wavefront
Tweeter
Wavefront
sensor
High-resolution
image
FIGuRE 8.34
A. woofer-tweeter. system. of. deformable. mirrors. consisting. of. a. high-stroke,. low-order. woofer.
membrane.mirror.with.a.low-stroke,.high-order.tweeter.MEMS.mirror..he.function.of.the.relay.optics.is.to.make.
images.of.the.pupil.at.each.deformable.mirror..(Credit:.Boston.Micromachines.)
Wavefront aberration
MEMS on
AO off
Bimorph on
300
250
200
150
100
50
0
0
5
10
Time (s)
15
20
FIGuRE 8.35
Measured. wavefront. aberration. over. a. 6. mm. pupil. before. and. ater. AO. compensation. with. a.
woofer-tweeter. dual. deformable. mirror.. Initially. the. adaptive. optics. system. is. of.. hen. the. woofer. (bimorph).
mirror.is.activated..Finally.the.tweeter.(MEMS).mirror.is.activated..(From.Chen,.D.,.et.al.,.
J Opt Soc Am. A
,.24,.
1305-1312,. 2007a;. Chen,. D.. C.,. et. al.,. High-resolution. adaptive. optics. scanning. laser. ophthalmoscope. with. dual.
deformable.mirrors.for.large.aberration.correction,.SPIE.Photonics.West.2007..San.Jose,.CA,.United.States,.January.
20-25,.2007,.Vol..6426,.
Ophthalmic Technologies XVII
,.edited.by.Fabrice.Manns,.Per.G..Soederberg,.Arthur.Ho,.
Bruce.E..Stuck,.Michael.Belkin,.p..64261L,.2007b.)
