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 300HF Features
 The high frequency accessory uses the Moire fringe
effect to enable light beams of up to 26mm (1 inch) diameter to be chopped at
frequencies of up to 20kHz. The 300HF high frequency accessory consists of a
fixed 200 slot disc on a mounting plate which bolts onto the standard 300H
chopping head. A second 200 slot disc is also provided and this is mounted onto
the motor boss in the usual way.
 When the moving
disc and the fixed disc are in phase, a maximum of 50% of the incident light is
transmitted. When the two discs are out of phase, almost the entire beam is
blocked. This process is simulated in the animated picture to the left. As
alignment and manufacture of the two blades is not 100%, the actual amount of
transmitted light will vary from approximately 5% to 45%.
 Please note that the 300HF
comes with a normal 200 slot blade (300D200) and
this does not need to be ordered seperately.
The 300HF is not recommended for use with
320 chopper systems nor is it compatible with the
300P blade protector. |
300HF445 Features
