Sigma LBA-712, LBA-710, LBA-714PC, LBA-300, LBA-708, LBA-500PC, LBA-700, LBA-400 manual ∝ m

Figure 37

The Centroid and Peak Histogram windows now have horizontal and vertical plot scaling in units of pixel, with histogram bins the size of a single pixel. Note also that we have the same plot orientation as the LBA-PC beam window. In the Figure above we can see that most of the centroids are falling 232 pixels from the left and 247 pixels from the bottom (assuming that your origin is set to Window LL). In order to get this into real world units we would simply multiply the pixel units by the pixel scale of the camera. In the example above the pixel scale, read form the camera dialog was 13 microns per pixel. Thus the centoid would become roughly:

	∝m	
			= 3024.58(∝m) From the left (X)
232.66( pixel) • 13		
	pixel 
	∝m	
			= 3221.4(∝m) From the bottom (Y)
247.80( pixel) • 13		
	pixel 

The ellipses in the histogram windows have X and Y diameters two standard deviations wide and tall respectively.

Operator’s Manual	91	LBA-PC
Doc. No. 10654-001, Rev 4.10