Handheld laser spot on tree 436
yds (by laser rangefinder)
Igniting smokeless powder
wrapped in plastic at 2ft
Popping balloons (I couldn't get
the third one because my hand was
moving too much)
Effects on tissue
Handheld at 212 yds
Mounted on P-rail along with an
X300 for comparison
My CLASS IV 445nm Handheld Laser Self Defense
(the last laser I put together was a 1.1 Watt near-IR laser which I
would like to turn into a covert long range pointer/illuminator) Note: I modified the
laser Tue Oct, 30 with a 1.8-2.0Watt 445nm diode!
It can be used for numerous
practical and survival
as many obvious scientific, research and industrial applications.
The laser is focusable and can
easily burn paper, wood,
as well as ignite fuses, matches and pyrotechnic mixtures with ease.
It is housed in a case similar to
the 6P SureFire light with
short lanyard and inexpensive holster
The maximum range is not as great
as professional military
because my optics are not as good. Range is half about good
optics and collimating.
It is not sturdy enough to
hit anyone with it, but certainly
could be used like a Kubotan which I used to help teach.
These are scary and dangerous to work
with and I do have safety glasses for this wavelength. I handle
it like a loaded firearm and it makes me more nervous than one.
p.s. I worked with a 3Watt CO2 laser in undergraduate research and
worked at Hughes Aircraft's Laser and Thermal Imaging lab
(more images coming)
It brings back memories of helping design the NdYAG laser rangefinder
which was going to be used for the Apache mounted TOW missile
(I wrote part of the TM for mounting/dismounting the TOW on a M113
<grin> that was boring work - except for getting paid to learn
about the TOW system)
(NOT the common purple/blue 405 nm in some laser pointers and other
inexpensive laser diodes.) This wavelength can produce photochemical damage Power output1,100mW +/- 100mW Beam shape Rectangular Beam width 5mm Divergence<2.0mrad est.
(< 0.1 deg at best focus) Operating mode CW
(continuous wave) Power source 2 X CR123A
or RCR123A batteries Driver current 1.20-1.25A Lens AR coated 3-element
glass, focusable Heat sink I just put a
more efficient Copper heat sink in Duty cycle 1 minute on/off Working temperature 0
deg. C - +30 deg. C Storage temperature -10
deg. C - +40 deg. C Diameter 1.02" (25.9mm) Length 4.79" (121.6mm) Weight (w/o batteries) 74
grams (2.6 oz) Weight w/batteries 107
grams (3.8 oz) Total run time Up to 1
hour per charge
My home made Near IR
Diode Laser 1180 mW output power (Max)
My last project which is not finished (because I am bad at making
I believe with a good collimating lens, this would make a good
>1000yd covert illuminator
Because the beam is invisible and high power, it scares me to work with
it! (IR can reflect off objects sometimes ones you wouldn't think
could reflect) Both of these can blind you instantly
and permanently - I have to get
safety glasses for this wavelength before I work with it again.
• These have a short multimode fiber optic cable with an SMA connector
that attaches to a simple collimating lens.
• Fiber core diameter is 100um.
• Center wavelength:870 nm
• Spectral width: 5-6 nm at
0.5 W output
• Spectral shape: Highly
multimode with a half dozen peaks between 865-871 nm
Lasing threshold: 236 mA
• Optical Power out at 0.54 A: 0.2 W
• Optical Power out at 1.0 A: 0.56 W
• Optical Power out at 1.5 A: 0.91 W
• Optical Power out at 2.0 A: 1.18 W
Surplus 1300 mW IR laser
I handheld an inexpensive magnifying lens while looking away and
used a Sony camcorder with Nightshot to record it which gave me
assurance that it would be a fine long-range illuminator/pointer.
Tree 100 yds, simple magnifying
glass and set to 1/3 power!
A photo using my near IR camcorder showing it burning a sheet of plastic
I've used it to burn wood as well.
FOR COMPARISON TO MY DIY LASERS THE B.E. MEYERS IZLID 1000P-W
Wavelength: 860nm (near IR)
Output Power: 950mW Maximum
Pointer Range: 43 km
Class IV (Not eye safe)
Sale of this
product is restricted to the Department of Defense through a direct
purchase. This product
is subject to U.S. Law, including ITAR, and requires a license from the
Department of State for export.
my visible laser (445nm) output power: 1100 mW +/- 100mW
my IR laser (870nm) output power: 1180 mW (Max)
max ranges not yet tested
MY LED MODIFICATION ON A 6 D-CELL
Years ago when I'd travel frequently
to NYC during its bad years I'd keep an old production 6 D-cell Maglite
in my day pack
(I also was trained in Tak Kubota's Police baton technique during my
years with him)
It is quite a club, but using it as I was taught is hard on the wrist
tendons and often can't be hidden well.
After reading the article on the SureFire E2D Defender, it gave me an
idea and I looked for a bright LED add on and found something. 1500 Lumens! (unfocused
so it's best up close)
No matter what Maglite says, their 6 cell is not the same as the
It is lighter and there are differences in the bulb and reflector
The original has uses a thicker and sturdier tube and is a bit heavier.
My nighttime walk-the-dog loadout
(there is a lot here)
MY STREET LEGAL ASP PROJECT
new photographer's monopod
Blue-light hazard is defined as the potential for a photochemical
induced retinal injury resulting from radiation exposure at wavelengths
primarily between 400 nm and 500 nm. This has not been shown
to occur in humans, only inconclusively in some rodent and primate
studies (also a lack of authoritative references, and quantifying the
conditions used) The mechanisms for photochemical induced retinal
injury are caused by the absorption of light by photoreceptors in the
eye. Under normal conditions when light hits a photoreceptor, the cell
bleaches and becomes useless until it has recovered through a metabolic
process called the visual cycle. Absorption of blue light,
however, has been shown to cause a reversal of the process where cells
become unbleached and responsive again to light before they are ready.
This greatly increases the potential for oxidative damage. By this
mechanism, some biological tissues such as skin, the lens of the eye,
and in particular the retina may show irreversible changes induced by
prolonged exposure to moderate levels of UV radiation and
I ran this at minimum power
probably around 10 Watts. It should make firebrick or glass glow
click for full images
the HV pwr supply is jury rigged as well as water coolant