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Glossary terms about Working distance

Working distance
The distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus.

19 pages mention Working distance

Collecting Z stacks
Components of the confocal microscope
Confocal microscopy
Fluorescence microscope
Fluorescence microscopy
Image acquisition (single scan)
It could be – and usually is – a small lens very close to the slide, but where a large working distance is required it can be larger and further away (and probably more expensive). 
Light microscopy
Multichannel imaging
Objective lens - magnification versus resolution
Pinhole - effects of resolution
Pixel arrays - dimensions versus pixel size
Scan speed - pixel dwelling, saturation
Scanning and resolution
Sequential and simultaneous
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Transmitted light microscope