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3:35

Spatial deteil vs acceptance angle

By: plintilh

Acceptance angle of objective must be wide enough to collect at least first order diffracted rays

2:25

See back focal plane using telescope

By: plintilh

The rear focal plane of the objective can be observed using a telescope insert into the eyepiece tube.

2:42

Spatial filtering in the transform plane

By: plintilh

Using a small aperture slider to remove diffracted orders in the transform plane eliminates detail in the image plane.

2:38

Acceptance angle vs working distance

By: plintilh

Working distance decreases with increasing acceptance angle.

1:28

Numerical Aperture vs useful magnification

By: plintilh

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

7:58

Deriving Numerical Aperture = N.A.

By: plintilh

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

39:56

The Hunting Ground

By: smairold

The Hunting Ground cced

4:32

Fourier musical analogy

By: plintilh

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

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.