Experiment Proposal - opera - Infn

more than 60 views/s recognising all micro tracks with tanθ ≤ 0.4 rad. The current view size is
150 × 120 µm 2 and thus 20 cm 2 film surface or more can be processed in one hour by one system. Since
the S-UTS exploits the same basic algorithms of the UTS, it is expected to have similar measurement
accuracy and efficiency.
Key features of the S-UTS are the high speed CCD camera with 3 kHz frame rate (120 Hz for the
UTS) and a piezo-controlled moving objective-lens, synchronised to the stage motion in order to avoid
go-stop of the microscope stage while taking images. A schematic block diagram of the S-UTS is shown
in Fig. 110.
Two solutions to avoid go-stop of the stage are being considered, as shown in Fig. 111. Type A
implies moving the objective lens along both the horizontal and the vertical axes, to compensate the
stage displacement while taking images. Type B consists of moving the objective lens only along the
vertical axis and correcting for the horizontal stage displacement on the image data stored in memory.
Type A has advantages of requiring less light power and simpler electronics. The disadvantage of Type
A is the requirement of a rather accurate control of the objective lens. Type B has opposite features,
since it needs more light power and complex electronics but requires a simpler objective lens control.
LVDS×25bit
15Gbit/sec
Digital Filter
Pixel Packer
ISA
Z
CCD
512 × 504 pixel
3k frame/sec
PCI
(U)
(V)
XY stage and light
PCI
(16 FPGA+32 SSRAM+
CPU) × 8
100k trial / sec
PCI bus bridge
X,Y,Z(,U,V) axes
and light control
Host PC1 Host PC2
Image Acquisition Recognize
Control
Micro tracks
Super UTS
Host PC3
Recognize
Base Tracks
Data Base (LAN)
Figure 110: The schematic diagram of the S-UTS being developed.
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