Re: how does a leveling laser make a line
- From: Sam Goldwasser <sam@xxxxxxxxxxxxxxxxxx>
- Date: 26 May 2006 16:47:35 -0400
David Nebenzahl <nobody@xxxxxxxxxxxxxxx> writes:
Sam Goldwasser spake thus:
"D. Whyte" <donwhyte@xxxxxxxxxxxxxxx> writes:
In an inexpensive leveling laser for home use, (such as theA line can be produced with a simple cylindrical lens like a glass
Lazerpro) how is the line or cross produced?
rod.
But they probably use a holographic optical element, like the kind
found
in laser pointers with 27 pattern heads. These are just very simple being
either a line or cross. Search for HOE - holographic optical element.
So no rotating mirrors? That would have been my guess. But maybe too
complex and prone to breakage for so simple a tool.
Some professional leveling lasers do use an upward pointing laser with
a rotating 45 degree mirror above it to produce a line 360 degrees around
all vertical surfaces.
But the cheap bubble level replacements don't. :)
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