Module sensors: device adapters for sensing devices (cameras, etc.)

hal.Sensor device adapters shipped with MicroscoPy:

• andor2 EMCCD cameras
• PCO pxlfly CCD cameras
• MCCDAQ USB2600 analog input

class microscopy.device_adapters.sensors.Dummy_Camera

Dummy scan for debug purpose.

class microscopy.device_adapters.sensors.Andor(cam, n=1, display=None, thermistor=None)

Device adapter for the Andor EMCCD andor2.Andor.

The camera is operated in Kinetic mode.

The exposure property allows changing the exposure on-the-fly (i.e., without pausing the scan first).

Parameters:

• cam (andor2.Andor) – an AndorUI object
• n (int) – number of images to take (default 1)
• display (microscopy.display.LiveDisplay) – the active camera live display
• thermistor – a Thermistor object to keep track of ambient temperature.

exposure

Query or set the exposure time (in ms).

If the camera is acquiring, the exposure change will be applied once the current snap is finished.

snap(new=True)

Return the latest data, either from a new acquisition sequence (new=True, default), or from the last one (new=False).

The data is also available

save_metadata(h5file, dataset_name)

Add acquisition atributes to an existing HDF5 dataset.

Parameters:

• h5file – a h5py.File (must be open)
• dataset_name (string) – name of the dataset (must have already been created).

dark()

Return a dark image (acquired with shutter closed).

intensity(center, width, new=True)

Return the sum of pixel values in a ROI centered at center, of with width.

center and width must be tuples. Works with 1D and 2D data. If new=True, snap a new image, otherwise use the last acquired image.

roi_1D(center, width, new=True)

Return a region of interest from a 1D spectrum.

Parameters:

• center (int) – center of the ROI (in pixel).
• width (int) – half-width of the ROI (in pixels).
• new (bool) – if True (default), acquire a new spectrum. Otherwise use the last acquired spectrum.

Returns:

1D array

class microscopy.device_adapters.sensors.AndorExposures(cam, exposures, n=1, display=None, thermistor=None)

An extension of the Andor camera class where for each scan position several images are taken with different exposures.

class microscopy.device_adapters.sensors.VoltIn(ai, scaling=-1, wait=0)

Analog input adapter.

Parameters:

• ai – analog input channel (any callable object that returns a float when called)
• scaling (float) – a multiplicative factor applied to the measured voltage

class microscopy.device_adapters.sensors.Pixelfly(camera)

Sensor adapter for PCO Pixelfly CCD cameras

Parameters:cam – a pxlfly.PyPixelfly instance