| Science Forum Index » Optics Forum » FS: Eye-safe Laser |
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| Rich |
 Posted: Wed Mar 22, 2006 5:27 pm |
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| Russell Lombardo |
| Posted: Wed Mar 22, 2006 9:57 pm |
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Per ANSI Z136.1-2000, an eyesafe, Class 1 laser emitting above 1.4 microns
cannot emit more than 7.9 mJ. Your laser would not be considered eyesafe
emitting 10 mJ.
- Russ
On 03/22/2006 2:27 PM, in article
1143066425.971191.277020@e56g2000cwe.googlegroups.com, "Rich"
<rmigliac@yahoo.com> wrote:
[quote:902f4a75ac]Price lowered.
Pulsed, Rated 10 mJ
Wavelength: 1.54 um
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7601013181
TIA: Rich
[/quote:902f4a75ac] |
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| Rich |
| Posted: Wed Mar 22, 2006 10:52 pm |
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Russ,
Thank you, you are absolutley right on this point. According to the
user manual "A Class I "eye-safe" 1.54um Q-switched laser must produce
<= 7.9mJ/pulse. If the output of the MR-253 is raised above 10mJ/pulse,
the intra-cavity power densities
will exceed the recommended limits.
I will make this clearer on the listing.
-Rich |
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| tai fu |
| Posted: Thu Mar 23, 2006 9:12 pm |
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Please take note there are NO SUCH THING AS EYE SAFE LASER!!!
even a 1mw laser can mess you up if you stare into the beam long enough. And
if you think lasers are eyesafe then those 125mw laser "pointer" arent for
you...
--
TAI FU
"Rich" <rmigliac@yahoo.com> wrote in message
news:1143066425.971191.277020@e56g2000cwe.googlegroups.com...
[quote:7471bd586b]Price lowered.
Pulsed, Rated 10 mJ
Wavelength: 1.54 um
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7601013181
TIA: Rich
[/quote:7471bd586b] |
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| Phil Hobbs |
| Posted: Fri Mar 24, 2006 12:22 am |
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tai fu wrote:
[quote:7727165666]Please take note there are NO SUCH THING AS EYE SAFE LASER!!!
even a 1mw laser can mess you up if you stare into the beam long enough. And
if you think lasers are eyesafe then those 125mw laser "pointer" arent for
you...
Dear Tai:[/quote:7727165666]
Back on your meds, old boy.
Cheers,
Phil Hobbs |
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| rll |
| Posted: Fri Mar 24, 2006 12:52 pm |
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Of course, eyesafe is a term that the Government coined, not one from
physicists. The rationalization for eyesafe laser is that the wavelength is
longer than 1.4 microns and hence is not transmitted through the lens to the
retina. These wavelengths are absorbed/reflected at the cornea/lens.
There is some research that states long-term exposure to longer wave light
may increase the likelihood of cataracts.
- Russ
"tai fu" <sdfgsdfg@aol.com> wrote in message
news:dvvkn1$2re$1@geraldo.cc.utexas.edu...
[quote:6a70ffa67c]Please take note there are NO SUCH THING AS EYE SAFE LASER!!!
even a 1mw laser can mess you up if you stare into the beam long enough.
And
if you think lasers are eyesafe then those 125mw laser "pointer" arent for
you...
--
TAI FU
"Rich" <rmigliac@yahoo.com> wrote in message
news:1143066425.971191.277020@e56g2000cwe.googlegroups.com...
Price lowered.
Pulsed, Rated 10 mJ
Wavelength: 1.54 um
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7601013181
TIA: Rich
[/quote:6a70ffa67c] |
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| Sam Goldwasser |
| Posted: Fri Mar 24, 2006 1:04 pm |
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"rll" <rlombard@westmont.edu> writes:
[quote:65a50081e2]Of course, eyesafe is a term that the Government coined, not one from
physicists. The rationalization for eyesafe laser is that the wavelength is
longer than 1.4 microns and hence is not transmitted through the lens to the
retina. These wavelengths are absorbed/reflected at the cornea/lens.
There is some research that states long-term exposure to longer wave light
may increase the likelihood of cataracts.
[/quote:65a50081e2]
Yeah, and a 1000 W CO2 laser isn't exactly eyesafe since it will remove
the eyeball entirely.
--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html
Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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| tai fu |
| Posted: Sat Mar 25, 2006 2:13 am |
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I thought it would also put a hole in your brain too.....
--
TAI FU
"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wr74rk9cb.fsf@saul.cis.upenn.edu...
[quote:a19f933345]"rll" <rlombard@westmont.edu> writes:
Yeah, and a 1000 W CO2 laser isn't exactly eyesafe since it will remove
the eyeball entirely.
[/quote:a19f933345] |
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| tai fu |
| Posted: Sat Mar 25, 2006 2:16 am |
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yea, but seriously though if you were selling "eye safe" lasers some kid
might buy it thinking you can shine it into people's eyes only to find out
it did some damage. Threes a reason all laser should be treated like its
going to mess your eyes or body parts bad, regardless of power or
wavelength.
--
TAI FU
"rll" <rlombard@westmont.edu> wrote in message
news:LlWUf.129$5k1.81@fed1read06...
[quote:eb8715468f]Of course, eyesafe is a term that the Government coined, not one from
physicists. The rationalization for eyesafe laser is that the wavelength
is
longer than 1.4 microns and hence is not transmitted through the lens to
the
retina. These wavelengths are absorbed/reflected at the cornea/lens.
There is some research that states long-term exposure to longer wave light
may increase the likelihood of cataracts.
- Russ
"tai fu" <sdfgsdfg@aol.com> wrote in message
news:dvvkn1$2re$1@geraldo.cc.utexas.edu...
Please take note there are NO SUCH THING AS EYE SAFE LASER!!!
even a 1mw laser can mess you up if you stare into the beam long enough.
And
if you think lasers are eyesafe then those 125mw laser "pointer" arent
for
you...
--
TAI FU
"Rich" <rmigliac@yahoo.com> wrote in message
news:1143066425.971191.277020@e56g2000cwe.googlegroups.com...
Price lowered.
Pulsed, Rated 10 mJ
Wavelength: 1.54 um
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7601013181
TIA: Rich
[/quote:eb8715468f] |
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| Skywise |
| Posted: Sat Mar 25, 2006 2:40 am |
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