Dear F.H. Lew.
The device I described has nothing to do with LED's. The
comment
relating to LEDs was simply directed toward distinguishing one of the
differences
between the effects of LLLTs and LED assemblies. I apologize if my syntax was
so
constructed as to mislead you. I did not intend to suggest that LEDs generated
a
coherent beam.
I will try to be more explicit in future postings.
Sincerely, Brooks Bradley.
FHLew wrote:
> Sir,
> I am both intrigued and curious about the cost-effective LLLT
> device
> described, comprising of 5 laser pointers. Please elighten me whether the 5
> laser
> pointers incorporate the use of Light-Emitting Diodes [LED]. Light rays from
> light-emitting diodes are not collimated and are also incoherent. Thanks.
>
> With regards
> Lew
>
> BROOKS BRADLEY wrote:
>
> > My attention has just been called to a transmission error in my earlier
> > post. The pointer arrangement should resemble the dots on the face of
> > dice----for the number five. My email program shifted the dots.
> > My
> > apologies. Brooks Bradley.
> >
> > To all interested list members.
> > Since I am, already, at my computer to comment on a
> > post by James Holmes, I will take the occasion to relate an item which
> > may be of some interest.
> > The college-age son of one of our staff researchers came
> > up with an effective---if not cosmetically attractive---unit for use by
> > persons with limiited funds and/or technical expertise. He constructed
> > an effective Low Level Laser Therapy (LLLT) unit by combining five (5)
> > laser pointers in a very simple arrangement.
> > The pointers were purchased from the local Harbor
> > Freight outlet, for a cost of $6.50 ea., plus tax. The configuration is
> > as follows: (1) the physical arrangement provides for the "natural"
> > arrangement for five similar bodies in an idealized "space utilizing"
> > configuration. e.g. _ _
> > _
> > _ _
> > (2) the operating switches (momentary, normally-open)
> > require some form of constant-pressure to stay activated. This is
> > addressed by using several twists from a rubber band which contacts all
> > of the four outside switches, simultaneously.
> > (3) the center pointer's on/off switch must be taped down
> > prior to arrranging the four outer units. (4) arrange the four outer
> > units in such a manner as to have their ON/OFF switch on a line directly
> > toward the center of the assembly (this provides the maximum contact
> > with the restraining rubber band. (5) assemble the pointers in a
> > manner which causes the lower, sloping sections to be parallel to each
> > other. This furnishes the closest allowable focus of the beams. (6)
> > using tape, or preferably, a properly-sized rubber band, restrain them
> > in the desired configuration. (7) next, apply the rubber band you have
> > chosen to close the Power Switches of the four outside pointers. Some
> > of you more adept-types may chose to use the same rubber band to both
> > hold the assembly together----and to operate the power switches, of the
> > outside pointers. Since the four outside pointers will be in a
> > divergent configuration toward the top of the assembly, some may desire
> > to mechanically stabilize it. This may be done through using short
> > lengths of "popcicle sticks", thin styrofoam inserts, etc., plus a weak
> > rubber band around the top of the assembly.
> > Although this explanation may be overly cumbersome, the
> > unit itself, is exceptionally simple to assemble.....and to use. The
> > power is low enough that the bulbs may be placed in direct contact with
> > the outer skin (at least this has been our experience), We have
> > employed this unit for continuous periods up to 15 minutes in a single
> > location, without any, detectable, adverse reactions beyond slight skin
> > reddening.
> > We have found this low-power unit to be quite effective for
> > applications within its power range. The chief advantage of the LLLT
> > over the LED units is that of penetrating power of the coherent light
> > beam. We have found no advantage for LLLT in conditions involving
> > superficial (outer cutaneous) insults----- among the experimental
> > populations.
> > Sincerely, Brooks Bradley..
> > P.S. Please do remember NEVER POINT ANY LASER DIRECTLY INTO ANYONE'S
> > EYE/EYES To do so can cause PERMANENT/IRREPARABLE damage to the centra
> > fovea.....plus other retinal damage.
> >
> > --
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