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Run of the mill = Laser LED (not HeNe)
cheap keychain one.

Ok, I setup one to point at my viewhole on my front door.
Runs 24 hours a day.
That was about 5 years ago.

No, I have no good reason for doing it, but it was setup and never taken
down.

So, it might give you an idea. Only off time is when the power goes out.

Just a fast response as a time estimate.

Michail

I am looking to construct a clock involving the use of a laser. I am
thinking of an over the counter laser pointer. Can anyone tell me the
average life and duty cycle of your run of the mill laser pointer?

Thanks,

Paul

On 7/5/10 9:27 AM, Paul Guncheon wrote:

I am looking to construct a clock involving the use of a laser. I am
thinking of an over the counter laser pointer. Can anyone tell me the
average life and duty cycle of your run of the mill laser pointer?

Thanks,

Paul

We use these in a spectrometer at the radio telescope I work at. They last about 30,000 hours, then the emission loses its spectral purity as the mirror erodes.

--
David Forbes, Tucson AZ

I built one using inexpensive lasers



To make the laser react fast enough to display something interesting,

I had to remove a lot of the over-voltage protection circuitry.

But semiconductor lasers are very delicate because a lot of energy

is lasing in a very small cavity.



The laser burnt out in a few months.

But at $7.00 each, easy to replace.



Lasers designed for fast switching are much more expensive,

at least when I tried this.



Ted





From: NEONIXIE-L@... [mailto:[email protected]] On Behalf Of Paul Guncheon
Sent: Monday, July 05, 2010 12:28 PM
To: NEONIXIE-L@...
Subject: [NEONIXIE-L] Laser Pointer Life





I am looking to construct a clock involving the use of a laser. I am
thinking of an over the counter laser pointer. Can anyone tell me the
average life and duty cycle of your run of the mill laser pointer?

Thanks,

Paul





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