Biomedical Engineering Reference
In-Depth Information
Trapping laser
Imaging bright
light and laser
Back-focal plane
interferometer
DIC
lamp
QPD
Sum and difference
amplifier
Polarizer
1
3
4
Dichroic
mirror
2
Sum and difference
amplifier
Condenser
lens
Computer
Motorized X-Y-Z stage
with a 2D CFE module
A/D converter
1
3
4
Backscttered
light detection
2
Objective
lens
QPD
Trapping
module
Beam block
Plane
beam
splitter
M1 M2
Nd:YVO
4
IR laser
Dichroic
mirror
Imaging
module
Aligning
lens
Beam expander
Tube lens
M3
M4
z
Relay optics
Plane
beam
splitter
x
Intermediate
focal plane
Beam
expander
Diode
laser
Polarizing
beam-splitter
y
CCD
camera
(a)
Primary trapping laser
QPD
DiM
Secondary trapping laser
Measurement laser
PZT
DiM
AOD
PBS
PBS
HWP
QWP
DM
(b)
Figure 19.3
(See companion CD for color igure.)
.Optical.tweezers.setup..(a).Schematic.of.a.HOT.optical.tweezers.setup,.
including. both. trapping. and. imaging. modules.. (b). A. photo. of. a. multiple-beam. optical. tweezers. appara-
tus.. (Reprinted. with. permission. from. Huang,. Y.,. Wan,. J.,. Cheng,. M.,. Zhang,. Z.,. Jhiang,. S.M.,. and. Menq,. C.,.
Three-axis. rapid. steering. of. optically. propelled. micro/nanoparticles,.
Rev
..
Sci
..
Instrum
.,. 80,. 063107,. Copyright.
2009,.American.Institute.of.Physics.)
