Class 1 Laser Diode

[Patty]

I need to make a laser pointer for a profoundly disabled friend. It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements. Any help in
locating a Class 1 laser diode that would be appropriate would be
REALLY appreciated.

Thanks.

Trish

 

[Wond]

On Thu, 23 Jun 2011 15:48:30 -0700, Patty wrote:

I need to make a laser pointer for a profoundly disabled friend. It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements. Any help in
locating a Class 1 laser diode that would be appropriate would be REALLY
appreciated.

Thanks.

Trish

So an ordinary dollar-store pointer is too dangerous? Must it be a laser?
How about a shadow-masked LED?

 

[Patty]

On Jun 24, 8:23 am, Wond <jet...@bcsuperNOTnet.com> wrote:

On Thu, 23 Jun 2011 15:48:30 -0700, Patty wrote:
I need to make a laser pointer for a profoundly disabled friend.  It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements.  Any help in
locating a Class 1 laser diode that would be appropriate would be REALLY
appreciated.

Thanks.

Trish

    So an ordinary dollar-store pointer is too dangerous? Must it be a laser?
 How about a shadow-masked LED?

Thanks for your reply. My friend is a quadriplegic who can't speak.
He has limited movement in one hand, but he hasn't the ability to
reach in order to get close enough to the letters on a communication
board to designate them. I'm not knowledgeable at all in this area,
but from experimenting I can see that a laser would work - if I could
make it safe for him. Could you explain what a shadow-masked LED is
and point me to a URL explaining how I could fabricate or where I
could purchase one? I'd appreciate that!

Thank you.

Trish

 

[Wond]

On Fri, 24 Jun 2011 19:48:06 -0700, Patty wrote:

On Jun 24, 8:23 am, Wond <jet...@bcsuperNOTnet.com> wrote:
On Thu, 23 Jun 2011 15:48:30 -0700, Patty wrote:
I need to make a laser pointer for a profoundly disabled friend.  It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements.  Any help in
locating a Class 1 laser diode that would be appropriate would be
REALLY appreciated.

Thanks.

Trish

    So an ordinary dollar-store pointer is too dangerous? Must it be
    a laser?
 How about a shadow-masked LED?

Thanks for your reply. My friend is a quadriplegic who can't speak. He
has limited movement in one hand, but he hasn't the ability to reach in
order to get close enough to the letters on a communication board to
designate them. I'm not knowledgeable at all in this area, but from
experimenting I can see that a laser would work - if I could make it
safe for him. Could you explain what a shadow-masked LED is and point me
to a URL explaining how I could fabricate or where I could purchase one?
I'd appreciate that!

Thank you.

Trish

I only meant to suggest, a light-tight cover over the LED with a suitable
hole in it. It could be a single-led fey-fob light with tape over it!

 

[Patty]

Hi

I tried 160 lumen flashlight with this FPO-06-AA7 Fiber Optic Adapter
(
http://www.google.com/products/catalog?q=FPO-06-AA-7&hl=en&um=1&ie=UTF-8&tbm=shop&cid=15532221311020211607&sa=X&ei=2V0GTsOkGOfRiAKex_G-DQ&ved=0CDUQ8wIwAw
) but just the reflection was seen, not the beam and he couldn't reach
far enough to designate all 26 letters of the alphabet.

I also tried covering the lense of flashlight with black electrical
tape with a small hole in it. Then the beam was then too wide to
specify one letter.

Thanks again.

Pat

On Jun 25, 8:14 am, Wond <jet...@bcsuperNOTnet.com> wrote:

On Fri, 24 Jun 2011 19:48:06 -0700, Patty wrote:
On Jun 24, 8:23 am, Wond <jet...@bcsuperNOTnet.com> wrote:
On Thu, 23 Jun 2011 15:48:30 -0700, Patty wrote:
I need to make a laser pointer for a profoundly disabled friend.  It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements.  Any help in
locating a Class 1 laser diode that would be appropriate would be
REALLY appreciated.

Thanks.

Trish

    So an ordinary dollar-store pointer is too dangerous? Must it be
    a laser?
 How about a shadow-masked LED?

Thanks for your reply.  My friend is a quadriplegic who can't speak. He
has limited movement in one hand, but he hasn't the ability to reach in
order to get close enough to the letters on a communication board to
designate them.  I'm not knowledgeable at all in this area, but from
experimenting I can see that a laser would work - if I could make it
safe for him. Could you explain what a shadow-masked LED is and point me
to a URL explaining how I could fabricate or where I could purchase one?
 I'd appreciate that!

Thank you.

Trish

      I only meant to suggest, a light-tight cover over the LED with a suitable
hole in it. It could be a single-led fey-fob light with tape over it!

 

[josephkk]

On Sat, 25 Jun 2011 16:12:43 -0700 (PDT), Patty <bonnypatty@gmail.com>
wrote:

Hi

I tried 160 lumen flashlight with this FPO-06-AA7 Fiber Optic Adapter
(
http://www.google.com/products/catalog?q=FPO-06-AA-7&hl=en&um=1&ie=UTF-8&tbm=shop&cid=15532221311020211607&sa=X&ei=2V0GTsOkGOfRiAKex_G-DQ&ved=0CDUQ8wIwAw
) but just the reflection was seen, not the beam and he couldn't reach
far enough to designate all 26 letters of the alphabet.

I also tried covering the lense of flashlight with black electrical
tape with a small hole in it. Then the beam was then too wide to
specify one letter.

Thanks again.

Pat

On Jun 25, 8:14 am, Wond <jet...@bcsuperNOTnet.com> wrote:
On Fri, 24 Jun 2011 19:48:06 -0700, Patty wrote:
On Jun 24, 8:23 am, Wond <jet...@bcsuperNOTnet.com> wrote:
On Thu, 23 Jun 2011 15:48:30 -0700, Patty wrote:
I need to make a laser pointer for a profoundly disabled friend.  It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements.  Any help in
locating a Class 1 laser diode that would be appropriate would be
REALLY appreciated.

Thanks.

Trish

    So an ordinary dollar-store pointer is too dangerous? Must it be
    a laser?
 How about a shadow-masked LED?

Thanks for your reply.  My friend is a quadriplegic who can't speak. He
has limited movement in one hand, but he hasn't the ability to reach in
order to get close enough to the letters on a communication board to
designate them.  I'm not knowledgeable at all in this area, but from
experimenting I can see that a laser would work - if I could make it
safe for him. Could you explain what a shadow-masked LED is and point me
to a URL explaining how I could fabricate or where I could purchase one?
 I'd appreciate that!

Thank you.

Trish

      I only meant to suggest, a light-tight cover over the LED with a suitable
hole in it. It could be a single-led fey-fob light with tape over it!

So it is a collimating issue then a brightness issue. A focused LED
sounds a lot safer! LED power is a lot easier to modulate (though you can
PWM a laser diode to the intended average power the peak and short time
power envelopes are not all that favorable). I found some publicly
available exposure information from IEC standards once, i would give you
the links of i had them handy.