SINFONI
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SPIFFI-GI takes operations at the VLT
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| SPIFFI-GI is transported to UT2 |
Lifting SPIFFI through the UT2 hatch |
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| SPIFFI on the Azimuth platform |
Frank Eisenhauer and Roberto Tamai (head
of the engeneering department at Paranal observatory) inspecting the flange |
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| Mounting SPIFFI to the Cassegrain derotator |
Mounting done |
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| SPIFFI at 90 degrees |
In the control room. Preparing the first
night together with Jason Spyromilio |
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| The SPIFFI team |
When the night comes ...
A more unusual view, all domes are open. |
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| In the control room. First light with
SPIFFI |
A shot from outside. In the foreground
UT1. In the background Jupiter and the Praesepe. In between UT2 with SPIFFI. |
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| After the night. M3 still folded away. |
Thanks SPIFFI |
Swinging SPIFFI
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SPIFFI mounted to the Cassegrain simulator
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| Before |
Lifting |
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| In between |
Done |
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Pictures from inside
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Between the Kloepperboden
and the coldplate |
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II |
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| III |
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Interface test
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In this test the conformaty
of the interfaces (SPIFFI and the AO module) are checked. The AO module (blue)
is directly connected to SPIFFIs top flange. |
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II |
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IV |
Spectra taken with SPIFFI
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These are raw images !!!
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| A argon frame in the J band. |
A neon+xenon frame in the H-band. The
grating is still slightly misaligned. |
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| A J-band spectrum of the above image |
A H-band spectrum of the above image |
Mounting the cryostat to the flange
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For the first time SPIFFI and the racks
have been mounted to the flange. |
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| Mounting the upper flange to the Cassegrain
derotator I |
We are good guys. We use helmets. |
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| Mounting the upper flange to the Cassegrain
derotator II |
Mounting the upper flange to the Cassegrain
derotator III |
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| Delivery of the spindle actuators |
The mounted top flange I |
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| The mounted top flange II |
The mounted top flange III |
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| The mounted top flange IV |
The mounted spindle actuators |
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| Mounting SPIFFI to the lower flange I |
Mounting SPIFFI to the lower flange II |
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| Mounting the racks to the lower flange
I |
Mounting the racks to the lower flange
II |
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| Mounting the racks to the lower flange
III |
Mounting complete |
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| Almost done |
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Preopticstest
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Pictures of the preopticstest
Images of a 10um fiber imgaged with the 100mas and 250mas scale optics.
The separation of the two black lines corresponds to the width of a slitlet.
The measured Strehl ratios vary between 75% and 100%. |
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| 100 mas, h-band, measured |
100 mas, h-band, theoretical |
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| 250 mas, j-band |
250 mas, h-band |
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| 250 mas, k-band |
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Fachbeirat:
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Pictures of the Fachbeirat
session.
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VERY FIRST SPECTRUM OF SPIFFI (cold) (6/5/2002):
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The first spectrum of SPIFFI
in the lab.
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This is the spectrum of a neon lamp
used for wavelength calibration. |
This picture shows an image of the slicer.
Instead of a grating a mirror has been used. The big blob in the middle comes
from light passing directly through the slicer. In other words we forgot
to mount the appropriate baffle. You can also see the shadow of the small
slicer in this blob. 6/4/2002 |
VERY FIRST LIGHT OF SPIFFI (warm) (5/29/2002):
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All mayor components have been mounted to the cold
plate. Without any calibration or alignment, SPIFFI had its very first light
at room temperature today in the lab. Instead of a grating a mirror has
been used for this exposure. A simple torch has been used as a light source. |
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| VERY FIRST LIGHT OF
SPIFFI !!! 5/29/2002 |
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Delivery of the new BaF2 blank:
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SPIFFIs spectrograph camera
consits of BaF2 and IRG2 crystal lenses. Especially the BaF2 crystals are
difficult to polish. Several blanks broke during the manufacturing process.
These pictures show one of the latest blanks before polishing. |
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The new blank. Between
two sheets of polarizing filters with their polarizing direction perpendicular
to each other
the crystal shows its block structure. |
One of the crystals from a former melt. |
Delivery of the SPIFFI GI equipment (5/23/2002):
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This equipment will be used during the
SPIFFI GI phase in 2003. The flange is neccessary to connect SPIFFI directly
to the Cassegrain derotator of the telescope. |
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| One part of the interface flanges. |
The other part of the flange |
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| The storage carriage |
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Assembly of the camera with the coated lenses (5/22/2002):
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Here you can see the subunits of the camera. |
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| One of the big BaF2
lenses broke during the coating process. Unfortunately there was no spare
left for this lens. So the parts have been glued together. The lens will
be exchanged as soon as possible. |
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Test of the gratings (4/29/2002):
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The optical quality of the gratings is
determined with an interferometric test. |
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| Matthias Tecza and Niranjan Thatte adjusting
the grating. |
The laser spot used for adjusting the
grating. |
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| The grating wheel. |
Matthias Tecza and Niranjan Thatte with
the grating wheel. |
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| Matthias Tecza mirrored in the K-Band
grating. |
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Delivery (4/23/2002) and Assembly (4/28/2002) of the
slicer
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The heart of Spiffi has arrived
at MPE. The image slicer consists of two parts, the small and the big slicer.
All components are made of Zerodur. |
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The maker (right) of the slicer. From
the left to the right :
Matthias Tecza (MPE) Beatrice Zuend, Johann Zuend. |
From the left to the right :
Matthias Tecza (MPE) Beatrice Zuend, Johann Zuend. Frank Eisenhauer
(MPE) |
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| The slicer edge-on. |
Slicer I |
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| Slicer II |
The small slicer I |
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| The small slicer II |
The small slicer III |
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| Matthias Tecza and the slicer. |
The assembled slicer I. |
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| The assembled slicer II. |
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Beginning of the preoptics tests (4/22/2002):
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With this test the imaging
quality of the SPIFFI preoptics will be investigated. |
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| The lens collimator |
The test stand. From left to right: Preoptics,
filterwheel, collimator, detector (on top) |
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| The test stand. II |
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Delivery of the collimator mirrors
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SPIFFI uses a three mirror
collimator. The individual mirrors are diamond turned. One mirror is spherical,
the other two ones are offaxis oblate ellipticals. |
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| Mirrors in a box |
Mirror 2 and 3 |
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| Mirror 2 |
Mirror 3 |
Test of the camera optics
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The task is to determine
the optical quality of the camera. A collimated beam from the interferometer
going through the camera is focused on the center of curvature of a concave
mirror. The reflected light is nearly going the same way back through the
camera into the interferometer where the light interferes. The pattern of
interference gives information about the optical quality of the camera. The
individual lenses are not yet coated with the antireflection coating. The
test is performed in the cleanroom of the integrationhall. |
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| The interferometric setup I (From
left to the right: the interferometer, the camera, the return sphere) |
The interferometric setup II |
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| The return sphere behind the camera |
The camera |
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Presenting the camera to ESO. From
left to right :
Henri Bonnet (ESO), Frank Eisenhauer (MPE), Bernard DeLabre (ESO), Stefan
Stroebele (ESO), Norbert Hubin (ESO), Hans Dekker (ESO) |
And the camera works. |
First Cooldown of the SPIFFI cryostat
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In the first cooldown cycle
we try to detect and repair vacuum leakage. Also the functionality of the
the equipment used is checked. |
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| SPIFFI mounted on the handling carriage. |
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Assembly of the Cassegrain simulator
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The Cassegrain simulator
assembled in the integration hall of MPE will help us to determine the stiffness
of the coldplate. SPIFFI will be mounted to the simulator in fall 2002. |
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Assembly of the housings and the Reinforcing structure
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The reinforcing structure
makes the coldplate more stiff. |
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| The Housing. (Collimator mirror 2 in
front) |
The Housing. (Slicer housing in front) |
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| The reinforcing structure I |
The reinforcing structure II |
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| The reinforcing structure III |
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The integrating sphere
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The integrating sphere is
used for calibrating the instrument. It illuminates SPIFFIs field of view
uniformly and provides several different lamps with lines covering the J,
H, and K window. |
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| The integrating sphere illuminated by
the halogen lamps |
A halogen flat field image |
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| The integrating sphere illuminated by
the neon lamp |
A neon flat field image |
The day after delivery of the cryostat
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All optical and optomechanical
components are mounted to the coldplate. It has direct contact with the liquid
nitrogen reservoir and has therefore a temperature of app. 77K. |
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| The top lid and the cylinder |
"Superisolation" |
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| The coldplate I |
The coldplate II |
February the 5th 2002 : Delivery of the SPIFFI cryostat
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The SPIFFI cryostat, the
biggest component of SPIFFI, has been delivered today. The box with the cryostat
inside weights 800kg. |
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| Delivery of the cryostat |
The SPIFFI handling carriage |
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| A big box I |
A big box II |
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| Yes, it fits into the elevator |
Down in the lab |
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| Christmas I |
Christmas II |
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| Here it comes |
Lifting the cryostat out of the storage
container I |
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| Lifting the cryostat out of the storage
container II |
The cryostat hanging on the crane |
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| SPIFFIs bottom |
Lifting the cryostat onto the handling
carriage |
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| The cryostat mounted onto the handling
carriage |
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January the 16th 2002 : Delivery of the Cassegrain
simulator
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The Cassegrain simulator
will be used to verify the conformance of the mechanical interfaces of the
SPIFFI cryostat adapter flange and the Cassegrain derotator flange. Furthermore
it will be used to measure any flexures of the cryostat. E.g. internal flexures
would cause a misalignment of the optical components mounted on the coldplate
and would therefore degrade the scientific performance of the instrument.
If the degree of the internal flexures are known well enough they can be
corrected partly e.g. by adjusting the secondary mirror of the UT. |
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| Delivery of the parts I |
Delivery of the parts II |
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| Moving the adapter ring |
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Movies
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| Mounting SPIFFI to the Cassegrain simulator
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Mounting SPIFFI to the Cassegrain simulator
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| Rotating SPIFFI at 0 degree I |
Rotating SPIFFI at 0 degree I |
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| Rotating SPIFFI at 90 degree I |
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