Ideas for womens' self-defense gear as well as my idea for an active-shooter defense









My 6P style 1+ watt 445nm laser video clips
Note:  I modified the laser Tue Oct, 30 with a 1.8-2.0Watt 445nm diode!


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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 Project
(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!





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)

Specifications:

Wavelength 445nm  (NOT the common purple/blue 405 nm in some laser pointers and other inexpensive laser diodes.) This wavelength can produce photochemical damage
Power output 1,100mW +/- 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

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Now if I can only get the Star Wars light saber noise!



Just finished next to an M855 round (click to enlarge)



The beam is even visible in a bright room


This is what the beam looks like at night


Disadvantage for weapon mounted use.  Blue light scatters in the atmosphere
more efficiently than IR or red lasers, so the beam can be very visible to anyone.

Handheld use: FBI light hold with Sig P229
(again instant permanent blindness)








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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 mounting hardware)
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.

Specs:
• 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 AeroPoint Laser

  • 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 MAGLITE

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 original.
It is lighter and there are differences in the bulb and reflector housing.
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

voila, my new photographer's monopod









Blue-light hazard

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)[4] 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.[5][6] 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.[7] 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 short-wavelength light.






I ran this at minimum power probably around 10 Watts.  It should make firebrick or glass glow white hot

click for full images

the HV pwr supply is jury rigged as well as water coolant