The LEO 982 Digital field emission SEM can produce images in high and/or low energy secondary electron, backscattered electron and cathodoluminescence mode. The instrument has the ability to acquire high-resolution images in the accelerating voltage range of 200 to 30,000 volts. Surface detail is enhanced at lower voltages. Images can be saved as TIF files on a PC server for network transfer or on CD or ZIP disk. The system has an Oxford energy dispersive spectrometer (EDS) for chemical identification of samples. .
This is the surface of a partially dissolved diatom.
These mineral grains show depth average-topography of near surface information at high accelerating voltage, 15 KV. Note the absence of detail.
This image shows the same minerals as Bone 12 only at low accelerating voltage, 2 KV. Note increase in surface detail. This is closer to the true surface topography.