[AZ-Observing] Re: Green Laser Pointer
- From: gene lucas <geneluca@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Fri, 05 May 2006 21:29:54 -0700
The problem with all the >green< lasers is that they work via an
"optical heterodyne" principle -- two solid-state IR lasers "beating"
against each other, to achieve the visible green line. Thus the
alignment is >very< critical on such units, and can easily get out of
adjustment, causing either a loss of power, or failure to produce the
green frequency at all. There are web sites that describe the
difficulty of trying to "tweak" one of these into operation (or >back>
into operation). A task of micro-manipulation to say the least!
My opinion is that you are merely demonstrating how dirty the air is
with these things..... If you see somebody shining a green one BACK at
you, I would get worried!! Why not buy one of those Ba-Zilllion
candlepower, battery operated spot lights at Chekker or Pep Boyz, and
put a coffee can shield on it?
Oh yeah, it's the kewl "laser" thing. I remember when every geek's
dream was to own a laser powerful enough to burn holes in razer blades.....
Gene Lucas
(17250)
Thom/TFW wrote:
>I still swear by the Howie Gladder SkyPointers. My first 5mw is still going
>strong after almost 5 years and my 2nd a 12mw is about 1.5 years old. My
>rule of thumb is if you can see the milky way the 5mw is enough, if you
>can't the 12mw works. If you call and talk to Howie he'll send one that he
>has opened up higher, it just adds cost.
>Thom
>----- Original Message -----
>From: "George Barber" <gbarber@xxxxxxxxxxxx>
>To: <az-observing@xxxxxxxxxxxxx>
>Sent: Friday, May 05, 2006 8:01 AM
>Subject: [AZ-Observing] Green Laser Pointer
>
>
>My laser pointer finally bit the dust after a little more than a year of
>use. I purchased it at wickedlasers.com. It was a really nice 55mW unit.
>
>
>[other ealier stuff snipped to make the Net Nanny happy.....I always have too
>much to blab about! GL]
>
>
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