Module azcam.tools.focus
Contains the Focus class. This is a common version which may be used for server and console processes.
Classes
class Focus
-
Class for focusing a camera.
Either the telescope or instrument may be moved for focus adjustment. May be used as a server or client script. The focus sequence performed is:
- expose
- move focus
- shift detector (2x last time)
- (repeat above steps)
- readout
- return to starting focus position
- save image
Create focus tool for server or console mode.
Ancestors
Instance variables
var description
-
Inherited from:
Tools
.description
descriptive tool name
var detector_shift
-
Number of rows to shift detector for each focus step
var enabled
-
1 when tool is enabled
var exposure_time
-
exposure time
var focus_component
-
focus component for motion - instrument or telescope
var focus_position
-
current focus position
var focus_step
-
Number of focus steps between each exposure in a frame
var focus_type
-
focus type, absolute or step
var initialized
-
Inherited from:
Tools
.initialized
1 when tool has been initialized
var is_reset
-
Inherited from:
Tools
.is_reset
1 when tool has been reset
var move_delay
-
delay in seconds between exposures
var number_exposures
-
Number of exposures in focus sequence
var set_pars_called
-
flag to not prompt when set_pars already called
var tool_id
-
name used to reference the tool ("controller", "display", …)
var verbosity
-
Inherited from:
Tools
.verbosity
verbosity for debug, >0 is more verbose
Methods
def abort(self)
-
Abort focus exposure.
def initalize(self)
-
Initialize focus routine.
def initialize(self) ‑> None
-
Inherited from:
Tools
.initialize
Initialize the tool.
def reset(self)
-
Reset focus tool to default values.
def run(self, exposure_time: [
, ] = 'prompt', number_exposures: [ , ] = 'prompt', focus_step: [ , ] = 'prompt', detector_shift: [ , ] = 'prompt') -
Execute the focus script. Parameters can be "prompt" or a value. If focus.set_pars() was previously called then those values are used and input here is ignored.
Args
number_exposures
- Number of exposures in focus sequence.
focus_step
- Number of focus steps between each exposure in a frame.
detector_shift
- Number of rows to shift detector for each focus step.
exposuretime
- Exposure time i seconds.
def save_keywords(self)
-
Save focus related keywords for image header.
def set_pars(self, exposure_time: float, number_exposures: int = 7, focus_step: float = 30, detector_shift: int = 10)
-
Set focus related parameters.
Args
number_exposures
- Number of exposures in focus sequence.
focus_step
- Number of focus steps between each exposure in a frame.
detector_shift
- Number of rows to shift detector for each focus step.
exposuretime
- Exposure time i seconds.