PR
EL
IM
INA
RY
EB-CCD
TV SCAN RATE TYPE : N7640
SLOW SCAN TYPE : N7220
For Low-Light-Level Imaging with high S/N ratio
s
Imaging Conditions
Object illuminance: 0.1 lx
Lens: FUJINON-TV Zoom Lens/H6x 12.5R :F1.2/f2
IMAGING COMPARISON
Using Resolution Test Chart
Commercial 2/3-inch CCD
EB-CCD N7640
OVERVIEW
The EB-CCD is an absolutely new high-sensitivity imaging
device that employs the 鈥淓lectron Bombardment (EB)鈥?effect for
image intensification. The EB-CCD basically consists of a
photocathode and a CCD chip arranged in parallel in a vacuum
tube. An optical image is converted at the photocathode into an
electron image, which is then accelerated and directly bom-
bards the CCD surface to produce electron multiplication. Even
a low-light-level image can be brought into view with a high S/N
ratio.
Two types of EB-CCD are available depending on the readout
method: the N7640 designed to operate at the TV scan rate
and the N7220 for slow scan readout. Both types are compact
and simple in structure, and deliver high sensitivity yet ensure
high S/N ratio. The EB-CCD will open up new applications as
the next generation of low-light-level imaging devices.
SENSITIVITY COMPARISON
(Calculated data)
TAPPB0068EA
1000
EB-CCD
N7640
100
SENSITIVITY (V
.
碌J
-1
.
cm
-2
)
NORMAL 2/3" CCD
10
1
200
300
400
500
600
700
800
900
1000
1100
WAVELENGTH (nm)
1
2
3
4
