pyAvantes

This python package allows you to view and parse Avantes raw8 spectra.

Example

Once it is loaded as a Raw8 object, the raw spectrum data is stored under the scope attribute, and the accompanying wavelength data is stored under the wavelength attribute.

import pathlib
from pprint import pprint

import matplotlib.pyplot as plt
import pyAvantes

package_path = pathlib.Path(pyAvantes.__path__[0])
example_path = package_path.parent / "doc/example.Raw8"
spectrum = pyAvantes.Raw8(example_path)

fig, ax = plt.subplots()
ax.plot(spectrum.wavelength, spectrum.scope)
plt.show()

If you have a reference blackbody source and a dark dataset in your file to compare against, you can compute the relative irradiance as calculated from the Avasoft manual.

$$S_\lambda = B_\lambda * (\textrm{sample}_\lambda - \textrm{dark}_\lambda )$$

The results of this calculation are presented as a relative_irradiance attribute.

fig, ax = plt.subplots()
ax.plot(spectrum.wavelength, spectrum.relative_irradiance)
plt.show()

You can view the header contents with a simple attribute access.

pprint(spectrum.header)

{'Avg': 5,
 'Boxcar': 1,
 'CalIntTime': 51.54999923706055,
 'ColorTemp': 2850.0,
 'IntTime': 23.329999923706055,
 'NTC2volt': 0.0,
 'SDmarker': 0,
 'SPCfiledate': 2120633355,
 'TrigMode': 0,
 'TrigSource': 0,
 'TrigSourceType': 0,
 'bitness': 0,
 'boardTemp': 35.5,
 'comment': '',
 'detectorTemp': 0.0,
 'enable': 1,
 'fitdata': (335.76513671875,
             0.599160432815552,
             -1.51733911479823e-05,
             -2.37885777742974e-09,
             0.0),
 'forgetPercentage': 100,
 'integrationdelay': 0,
 'laserDelay': 0,
 'laserWavelength': 0.0,
 'laserWidth': 0,
 'length': 25397,
 'measMode': 0,
 'numSpectra': 1,
 'saturationdetection': 1,
 'seqNum': 0,
 'smoothmodel': 0,
 'specID': '2108422U1',
 'startPixel': 0,
 'status': 2,
 'stopPixel': 1330,
 'store2ram': 0,
 'strobeCtrl': 0,
 'timestamp': 383032154,
 'userfriendlyname': '2108422U1',
 'version': 'AVS84'}

For convenience, many of the header dictionary items can be accessed directly by attribute access using snake_case names. For instance, the CalIntTime can be accessed outside of the header with the following syntax:

print(spectrum.calibration_integration_time)

51.54999923706055

The dot notation allows auto-completion engines to infer the attribute by partial match, so those who use such tools can guess any provided camelCase header name as a snake_case equivalent name and let the auto-completion engine complete the attribute name.

The acquisition date can be extracted as a dictionary or as a standard ISO 8601 string.

print(spectrum.date)
print(spectrum.datetime)

{'year': 2022, 'month': 6, 'day': 9, 'hour': 16, 'minute': 11}
2022-06-09 16:11:00