More information on laser speckle can be found here: Speckle pattern A Mirror Alignment Tool The most important part of constructing a ruby laser (or any laser with external mirrors) are getting the mirrors alligned [more…]
(a ruby rod lit by two bright blue LEDs. Due to the IR filter in my camera the pink colour is actually red. What you are seeing is the absorption of the blue light and the [more…]
Introduction For many years the Doc has had the desire to attempt the construction of a ruby laser. After six months of hard work, disappointment, late nights, lots of booze and a drained bank account [more…]
Ask anyone from the general public to name a great aeroplane or a great British fighter of WWII, and chances are they will say, without hesitation, “The Spitfire of course.” If you ask why you [more…]
I think most of us here don’t get terribly excited at the thought of the Boeing 737. It’s quite mundane, unremarkable, pedestrian even. I suspect more than a few of us here have been herded [more…]
When I was a young boy, I hated flying. I mean, really hated it. I think it was due to a traumatic flying experience on a transatlantic flight to Florida in a 747, back in [more…]
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