MULTIPHOTON LASER SCANNING MICROSCOPY
LSM 510 META NLO
Using the LSM 510 NLO direct coupled system
Carl Zeiss
03/06
B 45-0021 e
9-17
Begin scanning using the FAST XY mode. An image of the grid should appear on the screen. If not, adjust
the gain for each channel so that the output from both channels is visible. The two colors represent the
reflection of the 543 nm line (green) and the reflection of the NIR laser (red) on the metallic grid surface.
The focus may also need to be adjusted in order to get the optimal output from both channels. If the red
image is out-of-focus when the green image is in focus, the collimating lens should be adjusted so that
both beams are focused on the same spot. To adjust the collimator, open the Maintain panel in the LSM
510 software. While the laser is scanning, click on the pinhole button. At the bottom of this panel, there
is a slider to adjust the NIR collimator.
DO NOT ADJUST THE VIS COLLIMATOR.
Adjustments in the NIR collimator should improve the focus of the NIR beam. If no signal at all is detected
in the red channel, turn up the laser transmission in small increments and begin peaking alignment.
Note that once alignment is improved, the laser intensity will need to be attenuated to avoid
burning the slide. If no red signal at all can be found, contact a service engineer.
Once both beams are in focus, begin optimizing the overlay of the grids by first adjusting the routing
mirror that is closest to the laser. Make small adjustments using both alignment screws while watching
the effect on the monitor screen. Adjustments of this mirror will increase the intensity of the red signal.
Readjust the gain as needed. After optimizing the alignment using this mirror, begin adjusting the mirror
that is closest to the scan head (NOTE: A small hex wrench [Allen key] may be needed to adjust
alignment). Adjustments in this mirror will improve the alignment of the NIR overlay on the VIS overlay.
Go back and forth between these mirrors to walk the center the beam onto the back aperture of the
lens.
9.3.2.3
Tips on maintaining alignment with the scan head
Since the NIR beam is aligned into the scan head through mirrors and free space, it is possible that any
alteration in these routing components can effect proper alignment. Below are some tips to maintaining
good alignment:
•
Use the simplified tuning protocol in Section
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werden.
to tune to different wavelengths
•
Do not move the position of the 1m lens. Even small adjustments of these components may cause
significant changes in the alignment of the routing optics.
•
If recurring alignment drifts or power fluctuations in the laser are observed, consider floating the
optical table and/or regulating the room temperature more closely. Changes in the temperature of the
table or optical components can often cause drift in alignment of the laser and routing optics.
•
Avoid tuning the laser in increments larger than 50 nm without peaking the alignment.
Содержание LSM 510
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