CCD Image Format Routines

Introduction

This section governs the various routines to read CCD (2D Image file formats) Currently the following formats are implemented.

• Princeton Instruments SPE Files (Winview / WinSpec)

Princeton SPE Files

Princeton files can be read using the following example code:

>>> from pyspec.ccd.files import PrincetonSPEFile
>>> f = PrincetonSPEFile('myfile.spe')
>>> f.getData()
array([[[2855, 3125, 3041, ..., 1366, 1371, 1325],
     [2853, 3074, 3073, ..., 1384, 1362, 1371],
     [2830, 3098, 3105, ..., 1373, 1386, 1358],
     ...,
     [3086, 3376, 3375, ..., 1442, 1424, 1405],
     [3126, 3422, 3492, ..., 1450, 1409, 1390],
     [3232, 3592, 3561, ..., 1501, 1486, 1467]]], dtype=uint16)
>>> f.getData().shape
(1, 1340, 1300)
>>> f.getSize()
(1, 1340, 1300)

The class documentation is provided below for convinience:

class pyspec.ccd.files.PrincetonSPEFile(fname=None, fid=None)

Class to read SPE files from Princeton CCD cameras

getBinnedData()

Return the binned (sum of all frames) data

getChipSize()

Return a tuple of the size of the CCD chip

getComment(n=None)

Return the comments in the data file

If n is not provided then all the comments are returned as a list of string values. If n is provided then the n’th comment is returned

getData()

Return the array of data

getSize()

Return a tuple of the size of the data array

getVirtualChipSize()

Return the virtual chip size

openFile(fname)

Open a SPE file

readData()

Read all the data into the class