Holotomo
A helper object is provied to deal with the holotomo.
It handle the setup of the distances to be used for a specific pixel size. This is done by selecting a distance for the sample, while the detector stays in place.
It handles 2 ways to setup the distances, based on an offset or a ration of the first distance.
If a tracked translation-x axis is setup from the tomo config, it is used. Else the translation-x axis is used.
Configuration
- name: mrtomo_holo
plugin: bliss
class: Holotomo
package: tomo.controllers.holotomo
# reference to the main tomo configuration
# with that we have to know everything needed
# including sx, srot...
tomo: $tomo_config
# The coefficients to use to compute the distances
# in 'ratio' mode
ratios: [1.0, 1.0429, 1.2145, 1.5708, 1.7321, 2.0]
# The coefficients to use to compute the distances
# in 'offset' mode
offsets: [0.0, 1.0, 5.0, 15.0]
# The way to calculate the distances: One of 'offset' or 'ratio'
calcmode: ratio
# sleep time after a settle to a distance, in second
settle_time: 0.06
Use
The object have to be imported on the session.
After that it is also available from the tomo config object.
Else, it also can be used by it's name.
Show the state
The holotomo object have a common info.
It displays few informations, plus actual distance.
DEMO_SESSION [2]: tomo_config.holotomo
Out [2]: Holotomo:
pixel size 200 um
stabilization time 0.06 s
actual distance 2
x-axis (sx) 190.09 mm
distances
# distance [mm] position [mm] fov [mm]
--- --------------- --------------- ---------- ---
1 2000 104.29 25.6
2 2085.8 190.09 26.6982 <--
3 2429 533.29 31.0912
4 3141.6 1245.89 40.2125
Setup with a pixel size
DEMO_SESSION [8]: tomo_config.holotomo.pixel_size = 0.025
DEMO_SESSION [9]: tomo_config.holotomo
Out [9]: Holotomo:
pixel size 0.025 um
stabilization time 0.06 s
actual distance
distances
# position [mm] fov [mm]
--- --------------- ---------- --
1 -1895.46 0.0032
2 -1895.45 0.00333728
3 -1895.41 0.0038864
4 -1895.32 0.00502656
Setup with the first distance
DEMO_SESSION [10]: tomo_config.holotomo.first_distance = 2000
DEMO_SESSION [11]: tomo_config.holotomo
Out [11]: Holotomo:
pixel size 200 um
stabilization time 0.06 s
actual distance
distances
# position [mm] fov [mm]
--- --------------- ---------- --
1 104.29 25.6
2 190.09 26.6982
3 533.29 31.0912
4 1245.89 40.2125
Move to a distance
umove and move are provided to move to an already setup distance.
DEMO_SESSION [15]: tomo_config.holotomo.move(1)
Moving sx from -895.710000 to 104.290000
DEMO_SESSION [16]: tomo_config.holotomo.umove(1)
sx[mm]
user 104.290000
dial 104.290000