Transcript Prezentacja programu PowerPoint

LumiCal displacement
measurement present status
Wojciech Wierba INP PAN
Jerzy Zachorowski UJ
Wojciech Słomiński UJ
Leszek Zawiejski INP PAN
Krzysztof Oliwa INP PAN
Michał Karbowiak
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
1
Present setup – single laser beam
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BW camera DX1-1394a from Kappa
company 640 x 480 with Sony ICX424AL
(70€) sensor 7.4 μm x 7.4 μm unit cell size
Laser module LDM635/1LT from Roithner
Lasertechnik
ThorLabs ½” travel translation stage MT3
with micrometers (smallest div. 10 μm)
Neutral density filters ND2
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
2
Single beam setup layout
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
3
Single beam measurement
results I
2.5
Difference beetween points
[μm]
Y position
1.96
1.94
1.5
1.92
mm
2
1
0.5
1.9
0
-0.5
1.88
-1
-1.5
1.86
-2
1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3
mm
X position
4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5
mm
X position
Camera has been translated in 50 μm ± 2 μm (estimated error) steps
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
4
X position
Difference between points [μm]
Difference between points [μm]
Y position
Single beam measurement
results II
X position
Camera has been translated in 50 μm ± 2 μm (estimated error) steps
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
5
XYZ displacement
measurement with two beams
Two laser beams (one not perpendicular to the sensor) allows us
to measure XYZ translation in one sensor
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
6
Setup with two beams
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
7
Z translation of the camera
Z=
0 μm
Z = 250 μm
X and Y position are constant
The angle between two beams is ~30°
Z = 500 μm
Z = 750 μm
Z = 1000 μm
Z = 1250 μm
Z = 1500 μm
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
8
Proposed setup with two
beams and prism splitter
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
9
Readout electronics for CCD
Prototype
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
10
Readout electronics for CCD
analog part
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
11
Readout electronics for CCD
digital part
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
12
Conclusions
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The XY position measurement method with
single beam has the accuracy better than a
few micrometers
The different XY algorithm and new
measurements shows similar results
The XYZ position measurement with two
beams looks promising, a new algorithm has
been developed, results soon
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
13
Next steps
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New lasers with aspherical lenses – better spot
Beam splitter with half transparent mirror –
designed, not ordered yet
Setup with two lasers – better reliability
Improvement of algorithm to determine centre of
two spots
Discussion on possible errors
More compact prototype – in progress
Independent measurement of XYZ translations –
Renishaw industrial system (0.1 μm resolution)
Stability tests
February 12-13, 2006
FCAL Collaboration Meeting
INP PAN, Kraków, Poland
14