Holographic Systems

1
Holographic Systems

• Demetri Psaltis
• psaltis_at_caltech.edu

2
Outline

• Fast movies
• Angle multiplexing method
• Wavelength multiplexing
• 4-D imaging
• Dynamic 3-D imaging
• Spectroscopy of 3-D objects

3
Fast Movie
Cordin Scientific Imaging
Frame rate 1 million frames/sec
4
Examples of available instruments Cordin
Rotating mirror designs 25,000,000 frames/sec 128
frames
Gated multiple CCD cameras 100,000,000
frames/sec 8 frames
5
Angle Multiplexing
6
Angular Selectivity of Thick Holograms
1.0
0.8
Volume hologram
0.6
Diffraction Efficiency
0.4
Aprilis polymer film thickness200 microns
0.2
0.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Angle (degrees)
7
Pulse sequence generators
8
Holographic Camera
9
Short Movie
1.45mm X 1.06mm
Dt12 ns
10
Shock Wave Propagation in Air
I
II
I
II
III
11
Double Shock Waves
I
II
III
I
II
III
12
Reconstruction of the Object Field
Interferometry
Focusing at different depths
13
Carrier multiplexing
14
CCD Hologram
Hologram recorded on the CCD
DC filtered spectrum
15
Digital Filtering
Filtered spectrum
Recovered image RS
16
Reconstructions
Digital
Optical
17
Wavelength Multiplexing
Pulsed recording
CW read-out
18
Wavelength Multiplexing
Gun
19
Spectral Hole Burning Holography
20
Femtosecond Movie Camera
21
Volumetricspectral imaging of fluorescent
markers
3-D Specimen
color bands
RED
fluorescent markers
GREEN
Pump Beam
BLUE
depth slices
22
Holographic Microscopy
15 mm
23
Images of double-layer microspheres
Holographic spectra
Microscope image
1st layer
2nd layer
24
One-shot 4D imaging
volume hologram
detector array
25
3-D Imaging of Fluorescent Microspheres
15 mm Microsphere
Filter
CCD
Hologram

• 2mm PQ Polymer
• Objective NA0.65

CCD
26
3-layer imaging of fluorescent microspheres in
turbulence
y
x-l
27
Imaging with One Grating
Laser illumination
Y
X
Y
White light illumination
X
28
Fluorescent microscopy
Http//www.probes.com/servlets/gallery/
29
Spectral signature recognition
Pattern Recognition
30
(No Transcript)
31
DRS Technologies Camera
Repetition rate lt 10 million frames per second 8
frames
32
Diffraction Efficiency of Pulse Holograms
0.1
Diffraction Efficiency
0.01
0.001
0
1
2
3
4
5
6
Frame Number
33
Fast Holographic Movies
Pulsed recording
Reconstruction
MUX
Fast moving object