MiniScan

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The current Mini Scan window is derived from one of our oldest features.  It is essentially a reduced resolution image to enable fast scanning.   Below is the Mini Scan window captured from a test PC running an image gradient generator instead of a SEM.

Mini Scan opens, only the image window is active.  

Mini Scan has the following options which can be activated with the mouse or keyboard:

Source switch - toggles from SE view to BSE view 
Line profile display window.  Only the currently collected line data is displayed, that is, the window is cleared at the conclusion of each horizontal scan of the SEM.
Dwell settings - 'Dwell +' and 'Dwell -' increment or decrement the dwell timer setting by 1.  'Dwell MAX' and 'Dwell MIN' invoke the maximum or minimum dwell times. 

These additional functions are selected by the mouse:

Brightness offset slider - controls the video brightness via the video pre-scaling circuitry of the hardware.
Pre-Gain - allows one of four contrast settings to be selected.  Note that the current DRV-2000 has 4096 steps in contrast.  The Mini-Scan routine limits the choice to 4 contrast settings (25%, 50%, 75% and 100%) to accommodate backward software compatibility for users with older hardware. 

Finally, a status window appears at the bottom of the Mini-Scan window.  Normally this window displays the current signal source, the dwell time, contrast setting and brightness setting.  This is the only routine which actually displays the actual dwell time in microseconds.  For reference, the dwell times are approximately 1, 3, 10, 30, 100, 130, 300 and 1000 milliseconds per pixel.  These numbers are based on standard values of precision capacitors used in the gated integrator circuits.  Note that the status window goes 'live' when moving the brightness slider. 

Click LineScan to go to the last option under the Secondary and Backscatter menus.

 

DIGISEMTM and DRV-2000TM are a registered trademarks of ELMDAS Company.
Questions or problems regarding this CD should be directed to: jbest@elmdas.com
Copyright © 2001 ELMDAS Co.  All rights reserved.