C7700 Просмотр технического описания (PDF) - Hamamatsu Photonics
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C7700 Datasheet PDF : 4 Pages
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High Dynamic Range Measure
SYSTEM CONFIGURATION
3 Main Unit
1 Input Optics
C7700
6 Readout Cameras
Dual-Scan Cooled CCD Camera C4880-21
Camera head
Control unit
5 Output Optics
ORCA2
Camera head
Control unit
DUAL MODE COOLED CCD CAMERA
POWER
Frame Grabber
Mount Table A7703
GP-IB board
Streak Image Streak Image
Analysis Analysis Systems
Software for IBM PC/AT
Personal computer
(IBM PC/AT Compatible)
7 Readout System
(HPD-TA)
Optical
intensity
Trigger signal
Sweep circuit
Lens
Sweep electrode 4 Image Intensifier,
(where electrons are
swept in the direction
Image Booster
from top to bottom)
Streak image
Time
Space
Incident light
Slit
Accelerating electrode
Phosphor screen
Photocathode
(where electrons are
accelerated)
(electrons → light)
(light → electrons)
2 Streak Tube
Time
Space
[Operating Principle]
The light pulse to be measured is focused onto the photocathode
of the streak tube through the slit, where the photons are con-
verted into a number of electrons proportional to the intensity of
the incident light. These electrons are accelerated and conducted
towards the phosphor screen, and a high-speed voltage which is
synchronized to the incident light is applied. The electrons are
swept at high speed from top to bottom, after which they are bom-
barded against the phosphor screen of the streak tube and con-
verted to an optical image.
When the light intensity of the streak image is very weak, an image
intensifier or an image booster amplifies the low light level streak
image.
D-range of 10 000:1 of ultrafast phenomena under single-shot operation
FEATURES
q High dynamic range of 10 000:1*
q Temporal resolution of 5 ps*
q Effective photocathode size: 17 mm
q Simultaneous measurement of light intensity
on temporal and spatial (wavelength) axis
q IEEE 488 (GP-IB) control
*[About a Dynamic Range]
The maximum dynamic range of the streak camera essence is set to
1000:1 by the measurement condition of temporal resolution 5ps, and
is set to 10 000:1 by the measurement condition of temporal-resolution
100ps. With a light intensity, the image intensifier tube, such as an
image intensifier or an image booster, is combined with a streak
camera. In this case, the image intensifier tube may restrict the
dynamic range of the measurement system. Furthermore, a read-out
camera may also restrict the dynamic range of the measurement
system.
Readout Camera Image Intensifier Tube
C4880-21
ORCA2
Image Intensifier
Image Booster
Image Intensifier
Image Booster
Temporal Resolution
5 ps
100 ps
1000:1
2000:1
-
10 000:1
1000:1
2000:1
-
3000:1
APPLICATIONS
q Research involving laser fusion lasers, free
electron lasers and various other types of
pulsed lasers
q Plasma light emission, radiation, laser ab-
lation, combustion and explosion
q Picosecond transient absorption measurement
(Time dependence of absorption is shown below.)
∆OD = 0.1
S1 - Sn absorption
∆λ = 482 to 489 nm
T1 - Tn absorption
∆λ = 557 to 581 nm
0
1
2
3
4
5
Time (ns)
v The 266 nm excitation (25 ps, 0.2 mJ, 2 mm focused,
single shot) of Chrysene in THF (0.5 mmol/l)
q LIDAR, Thomson scattering, time-of-flight
laser ranging
q Fluorescence lifetime measurement, time-
resolved Raman spectroscopy
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