Tag Archives: diffraction grating

Laser Galvanometers 2D

A Lissajous figure with frequencies in a ratio of 2:3 formed by different signals to two laser galvanometers

I arranged two mirror galvanometers to give two dimensional control of a 10mW HeNe laser beam. “Continue reading” for further information and another 9 photos. Continue reading

Old Helium Neon lasers

This old HeNe laser uses my microwave oven supply and is using 2kV hereA working HeNe tube is shown below running at 2 kV with a 330 kohm resistor. It takes about 3 – 4 kV to trigger. It is shown firing through a 15,000 lines per inch diffraction grating and shows the first order spectra.
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Argon Laser 40 mW Blue

Argon laser 40 mW Blue

Argon Laser 40 mW Blue Laser, multi-line. Unusual in that it has multiple spectral lines. Of course these days, simple handheld diode lasers can be much brighter than this. The power supply and control unit are on the left and the head unit with fan on top. The beam is highlighted by a water spray. I love electronics with a key start.
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Blu-ray Violet Laser

BluRay violet laser

A Blu-ray violet laser is made up into a hand held unit.
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