1:55

Depth of field

By: plintilh

Depth of field - object plane

4:27

Depth of focus

By: plintilh

Depth of focus - image plane

21:21

Numerical aperture revisited

By: plintilh

N.A Plus immersion oil

3:35

Object detail vs. acceptance angle

By: plintilh

The finer the spatial detail in an object the wider the diffraction angle - easily seen with a laser pointer and a fine grating.

4:32

Fourier musical analogy

By: plintilh

Complex frequency-based information can be decomposed into combinations of simple waveforms.

4:13

Importance of Condenser N.A.

By: plintilh

Condenser N.A. must at least match that of the objective to realize full resolution.

7:58

Deriving Numerical Aperture = N.A.

By: plintilh

The geometries of diffraction patterns must match the geometries of acceptance angle.

1:28

Numerical Aperture vs useful magnification

By: plintilh

A quick estimate of useful magnification: N.A. X 1000.

2:38

Acceptance angle vs working distance

By: plintilh

Working distance decreases with increasing acceptance angle.