Lee. S. R.
<3D glasses> <Non-glasses> <Hologram>
2D display 3D display
Anarchrome Lenticular Holography
Polarization Pulfrich eff
-Better complete 3D picture
Astronomy field : galaxy modeling Entertainment
Medical field : modeling for human’s organs
How do eyes cognize the depth of virtual image as 3D picture?
Psychological factors help our eyes to sense depth of image (LOST)
A. Linear perspective
C. Shading and shadow
D. Texture gradient
However, all of these is ‘NOT’ real 3D image, but just 2D image which
helps observer to sense depth of image.
Physical factors actually stimulate our eyes to sense 3D effect
Factors are as follows : ABC
As the object of location from observer changes, crystalline lens(eye
lens) enables eyes to sense the depth of image by controlling curvature
of eye lens.
B. Binocular disparity
Owing to gap between two eyes, people can get a different image from
The angle which two iris make will be different depending on the
Hologram means ‘complete picture’
Key point as follows
Light source : Laser , coherence !!
Picture (2D) : Only amplitude
Hologram (3D) : Not only amplitude but also phase
Phase (Distance, i.e. perspective)
Main principle as follows
Interference + Diffraction → Complete 3D picture
Schematic diagram of traditional 3D hologram
Approach for holography in terms of wave optics
[1st step: Interference phenomenon] Recording process
coherent reference wave + object wave (wave scattered from object)
→ Interference pattern
Fig2. Interference pattern on sensitive film
At (b), the relative phase(Φ)
2 x sin x
( x) sin
2 AB ,
E 2 E 0 cos sin( wt kx )
cn 0 2
I ( x) E
1 1 2 2 1
c 0 (2 E0 cos ) 2c 0 E0 cos
2 2 2
[2nd step: Diffraction phenomenon] Reconstruction
EO E0O ( x, y ) cos[2 t ( x, y )]
Amplitude- and phase- modulated carrier wave
E0 B E0O
I ( x, y ) ( EB EO ) 2
E0 B E0O cos( 0 )
The amplitude transmission profile of the processed hologram can be made
proportional to I(x,y).
[Final step: Superposition] Hologram
Reference wave (ER)+ Diffracted wave by fringe I(x,y)
→ Final emerging wave(EF) forms 3D hologram
* ‘Fringe’ serves as if it is slit.
The final emerging wave, EF(x,y) is proportional to the product I(x,y)ER(x,y)
ER ( x, y ) E0 R cos[2 t ( x, y )] :reconstructing wave
EF ( x, y ) I ( x, y ) E R ( x , y )
E0 R ( E0 B E0O ) cos[2 t ( x, y )]
E0 R E0 B E0O cos(2 t 2 O ) E0 R E0 B E0O cos(2 t O )
Note that final emerging wave has both of component
-amplitude and phase- information of object!
How can be information of light encoded in photo plate?
Interference pattern can be fringe pattern.
Photo sensitive film materials
Silver halide High resolution
Easy to work
DCG(Dechromated gelatin) High efficiency of diffration
Long process time
Photopolymer Plastic composite
No chemical interaction
HUD(Head up display)
-Transparent instrument cluster
-Used in a various field such as car,
airplane, and ship..
Security sensor & system
-3 dimensional information –mass storage
-Use polymer as recording media
-Efficiency and portable (Stamp-sized disk can have capacity
as much as 150GB
Holography technology is based on principle of interference and diffraction.
-Complete realization of 3D display without tools-glasses..
-Possible to get higher resolution than any other 3D display methods
(The diffracted wave contains amplitude as well as phase information)
-Very prospective (asks high technology)
-Memory : disk
-Screen : HUD
-Security : Holographic sticker and design