How Helene Affected The People Of Appalachia

Herschel Smith · 30 Sep 2024 · 11 Comments

To begin with, this is your president. This ought to be one of the most shameful things ever said by a sitting president. "Do you have any words to the victims of the hurricane?" BIDEN: "We've given everything that we have." "Are there any more resources the federal government could be giving them?" BIDEN: "No." pic.twitter.com/jDMNGhpjOz — RNC Research (@RNCResearch) September 30, 2024 We must have spent too much money on Ukraine to help Americans in distress. I don't…… [read more]

Green Laser Eye Protection In The Wild

BY Herschel Smith
4 years, 2 months ago

We’ve all seen that Antifa/BLM has blinded the border patrol agents sent to protect federal property in Portland.  Andy Ngo has been directly attacked with a green laser, and he points out that the threat is expanding (via WiscoDave).

After #antifa were dispersed by police following the attack on the East Precinct, they tried to blind a woman at her home with lasers and attacked her.

This is remarkable video.  The communists have found an effective weapon short of using firearms.  So the question is necessarily posed, what can you do about this threat?  The answer isn’t easy or clear short of deadly force (and this in fact may be the best option, but it may be difficult to effect that end for reasons we’ll discuss below).

Most of this post will be the result of studying I did on laser safety for a very specific examination, and it has been a long time since that study, so some of it will be incomplete, and some may be inaccurate.  As readers stumble on better data, knowledge and analysis, feel free to post it here.  I make no claims as to the complete accuracy of everything in this post.  I offer it up as a starting point.  I can follow it up with more information, but I’ll need reader assistance to do that.

To begin with, you need to understand the concept of optical density (OD) calculations.  According the ANSI Z136.1-2007, a class IIIa laser is visible and limited to 1-5 mW.  Nothing more powerful can be sold in the U.S. without special licensing (if the communists in Portland are using lasers more powerful than 5 mW, then this poses a special and expanded problem, even worse than I am assuming).

I could post calculations of OD, but it’s best simply to watch this short video if you want to pursue it (for folks who have an aversion to math, here is an online application that will do these OD calculations for you).  Now listen carefully.  He credits the blink, or aversion, reflex in his calculations.  The blink reflex is 0.25 seconds.  The blink reflex is also credited in laser protection eyewear for green light lasers (532 nM).

The ANSI Z136.1 Standard bases the “blink reflex” MPE on an exposure on 0.25 second exposure. This yields an MPE of 2.5 mW/cm2. When this irradiance is spread over a “worst case” 7mm pupil opening (0.4 cm2), the total power entering the eye can be then computed as follows: Power = (2.5 mW/cm2) x (0.4 cm2) = 1.0 mW. This suggests that laser pointer type devices might be limited to an output of 1 mW (Class II).

In some darkly lit environments, and at some wavelengths, a 1 mW pointer power is perhaps an option, but in rooms with a high ambient light level and if operation is at the longer 670 nm wavelength, 1 mW is just marginal for visibility and, therefore, 3-5 mW is generally required for better visibility. Note that if the exposure is raised to a maximum of 5 mW (Class IIIA), then an eye filter with an optical density of 0.7 would be required for protection in the event of an intrabeam exposure of 0.25 seconds. This suggests that caution is needed when the pointer emits near the 5 mW power level!

When they speak of optical density, remember that lasers emit radiation, and just like radiation emitted from the nucleus of an atom (laser wavelengths are emitted from the electron shell), it is attenuated exponentially (or in this case, log base 10 will describe the effectiveness of eyewear).  You don’t stop it – you just attenuate it.

OD1+ = 10% gets through

OD2+ = 1% gets through

OD3+ = .1% gets through

OD4+ = ..01% gets through

This video shows you how poor the cheap eye protection purchased from EBay and Amazon might behave.

It’s up to you.  You can opt for the cheaper stuff being marketed to military and law enforcement, or you can purchase ANSI Z136.1 rated and tested eye protection marketed for industrial laser safety use.  Either way, remember that in all cases of which I’m aware, no eye protection can enable you to stare directly into a laser nonstop with no aversion response (or maybe a better way of saying it is that the OD calculations would show an extreme level of protection that no one sells to be able to look at a laser nonstop).  All eye protection design assumes the blink reflex of 0.25 seconds.

Also, it may be that wearing this eye protection isn’t conducive to good vision at night and in a threatening environment where you need all of your faculties and senses.  In the case Andy Ngo links above, the lady under threat has perhaps dozens of green light lasers pointed at her, little time to respond, and the communists are gleefully taking video of the suffering of the innocent.

The best bet in case of threat from visible lasers is to not be around those who would threaten you.  If you do happen to be in proximity of those threats, then remember that looking into an array of lasers in order to try to effect self defense isn’t advised, even if you are wearing eye protection.  Blink.  Be averse to this threat.  Get away from it.

This is a serious threat folks.  Being tactically careless or thoughtless in dealing with the threat isn’t recommended.

As time permits, I may update this brief post.


26th MEU (10)
Abu Muqawama (12)
ACOG (2)
ACOGs (1)
Afghan National Army (36)
Afghan National Police (17)
Afghanistan (704)
Afghanistan SOFA (4)
Agriculture in COIN (3)
AGW (1)
Air Force (40)
Air Power (10)
al Qaeda (83)
Ali al-Sistani (1)
America (22)
Ammunition (284)
Animals (297)
Ansar al Sunna (15)
Anthropology (3)
Antonin Scalia (1)
AR-15s (378)
Arghandab River Valley (1)
Arlington Cemetery (2)
Army (87)
Assassinations (2)
Assault Weapon Ban (29)
Australian Army (7)
Azerbaijan (4)
Backpacking (3)
Badr Organization (8)
Baitullah Mehsud (21)
Basra (17)
BATFE (229)
Battle of Bari Alai (2)
Battle of Wanat (18)
Battle Space Weight (3)
Bin Laden (7)
Blogroll (3)
Blogs (24)
Body Armor (23)
Books (3)
Border War (18)
Brady Campaign (1)
Britain (38)
British Army (35)
Camping (5)
Canada (17)
Castle Doctrine (1)
Caucasus (6)
CENTCOM (7)
Center For a New American Security (8)
Charity (3)
China (16)
Christmas (16)
CIA (30)
Civilian National Security Force (3)
Col. Gian Gentile (9)
Combat Outposts (3)
Combat Video (2)
Concerned Citizens (6)
Constabulary Actions (3)
Coolness Factor (3)
COP Keating (4)
Corruption in COIN (4)
Council on Foreign Relations (1)
Counterinsurgency (218)
DADT (2)
David Rohde (1)
Defense Contractors (2)
Department of Defense (210)
Department of Homeland Security (26)
Disaster Preparedness (5)
Distributed Operations (5)
Dogs (15)
Donald Trump (27)
Drone Campaign (4)
EFV (3)
Egypt (12)
El Salvador (1)
Embassy Security (1)
Enemy Spotters (1)
Expeditionary Warfare (17)
F-22 (2)
F-35 (1)
Fallujah (17)
Far East (3)
Fathers and Sons (2)
Favorite (1)
Fazlullah (3)
FBI (39)
Featured (190)
Federal Firearms Laws (18)
Financing the Taliban (2)
Firearms (1,798)
Football (1)
Force Projection (35)
Force Protection (4)
Force Transformation (1)
Foreign Policy (27)
Fukushima Reactor Accident (6)
Ganjgal (1)
Garmsir (1)
general (15)
General Amos (1)
General James Mattis (1)
General McChrystal (44)
General McKiernan (6)
General Rodriguez (3)
General Suleimani (9)
Georgia (19)
GITMO (2)
Google (1)
Gulbuddin Hekmatyar (1)
Gun Control (1,672)
Guns (2,338)
Guns In National Parks (3)
Haditha Roundup (10)
Haiti (2)
HAMAS (7)
Haqqani Network (9)
Hate Mail (8)
Hekmatyar (1)
Heroism (5)
Hezbollah (12)
High Capacity Magazines (16)
High Value Targets (9)
Homecoming (1)
Homeland Security (3)
Horses (2)
Humor (72)
Hunting (38)
ICOS (1)
IEDs (7)
Immigration (114)
India (10)
Infantry (4)
Information Warfare (4)
Infrastructure (4)
Intelligence (23)
Intelligence Bulletin (6)
Iran (171)
Iraq (379)
Iraq SOFA (23)
Islamic Facism (64)
Islamists (98)
Israel (19)
Jaish al Mahdi (21)
Jalalabad (1)
Japan (3)
Jihadists (81)
John Nagl (5)
Joint Intelligence Centers (1)
JRTN (1)
Kabul (1)
Kajaki Dam (1)
Kamdesh (9)
Kandahar (12)
Karachi (7)
Kashmir (2)
Khost Province (1)
Khyber (11)
Knife Blogging (7)
Korea (4)
Korengal Valley (3)
Kunar Province (20)
Kurdistan (3)
Language in COIN (5)
Language in Statecraft (1)
Language Interpreters (2)
Lashkar-e-Taiba (2)
Law Enforcement (6)
Lawfare (14)
Leadership (6)
Lebanon (6)
Leon Panetta (2)
Let Them Fight (2)
Libya (14)
Lines of Effort (3)
Littoral Combat (8)
Logistics (50)
Long Guns (1)
Lt. Col. Allen West (2)
Marine Corps (280)
Marines in Bakwa (1)
Marines in Helmand (67)
Marjah (4)
MEDEVAC (2)
Media (68)
Medical (146)
Memorial Day (6)
Mexican Cartels (41)
Mexico (61)
Michael Yon (6)
Micromanaging the Military (7)
Middle East (1)
Military Blogging (26)
Military Contractors (5)
Military Equipment (25)
Militia (9)
Mitt Romney (3)
Monetary Policy (1)
Moqtada al Sadr (2)
Mosul (4)
Mountains (25)
MRAPs (1)
Mullah Baradar (1)
Mullah Fazlullah (1)
Mullah Omar (3)
Musa Qala (4)
Music (25)
Muslim Brotherhood (6)
Nation Building (2)
National Internet IDs (1)
National Rifle Association (97)
NATO (15)
Navy (30)
Navy Corpsman (1)
NCOs (3)
News (1)
NGOs (3)
Nicholas Schmidle (2)
Now Zad (19)
NSA (3)
NSA James L. Jones (6)
Nuclear (62)
Nuristan (8)
Obama Administration (221)
Offshore Balancing (1)
Operation Alljah (7)
Operation Khanjar (14)
Ossetia (7)
Pakistan (165)
Paktya Province (1)
Palestine (5)
Patriotism (7)
Patrolling (1)
Pech River Valley (11)
Personal (73)
Petraeus (14)
Pictures (1)
Piracy (13)
Pistol (4)
Pizzagate (21)
Police (656)
Police in COIN (3)
Policy (15)
Politics (980)
Poppy (2)
PPEs (1)
Prisons in Counterinsurgency (12)
Project Gunrunner (20)
PRTs (1)
Qatar (1)
Quadrennial Defense Review (2)
Quds Force (13)
Quetta Shura (1)
RAND (3)
Recommended Reading (14)
Refueling Tanker (1)
Religion (495)
Religion and Insurgency (19)
Reuters (1)
Rick Perry (4)
Rifles (1)
Roads (4)
Rolling Stone (1)
Ron Paul (1)
ROTC (1)
Rules of Engagement (75)
Rumsfeld (1)
Russia (37)
Sabbatical (1)
Sangin (1)
Saqlawiyah (1)
Satellite Patrols (2)
Saudi Arabia (4)
Scenes from Iraq (1)
Second Amendment (685)
Second Amendment Quick Hits (2)
Secretary Gates (9)
Sharia Law (3)
Shura Ittehad-ul-Mujahiden (1)
SIIC (2)
Sirajuddin Haqqani (1)
Small Wars (72)
Snipers (9)
Sniveling Lackeys (2)
Soft Power (4)
Somalia (8)
Sons of Afghanistan (1)
Sons of Iraq (2)
Special Forces (28)
Squad Rushes (1)
State Department (23)
Statistics (1)
Sunni Insurgency (10)
Support to Infantry Ratio (1)
Supreme Court (62)
Survival (201)
SWAT Raids (57)
Syria (38)
Tactical Drills (38)
Tactical Gear (15)
Taliban (168)
Taliban Massing of Forces (4)
Tarmiyah (1)
TBI (1)
Technology (21)
Tehrik-i-Taliban (78)
Terrain in Combat (1)
Terrorism (96)
Thanksgiving (13)
The Anbar Narrative (23)
The Art of War (5)
The Fallen (1)
The Long War (20)
The Surge (3)
The Wounded (13)
Thomas Barnett (1)
Transnational Insurgencies (5)
Tribes (5)
TSA (25)
TSA Ineptitude (14)
TTPs (4)
U.S. Border Patrol (6)
U.S. Border Security (19)
U.S. Sovereignty (24)
UAVs (2)
UBL (4)
Ukraine (10)
Uncategorized (99)
Universal Background Check (3)
Unrestricted Warfare (4)
USS Iwo Jima (2)
USS San Antonio (1)
Uzbekistan (1)
V-22 Osprey (4)
Veterans (3)
Vietnam (1)
War & Warfare (419)
War & Warfare (41)
War Movies (4)
War Reporting (21)
Wardak Province (1)
Warriors (6)
Waziristan (1)
Weapons and Tactics (79)
West Point (1)
Winter Operations (1)
Women in Combat (21)
WTF? (1)
Yemen (1)

November 2024
October 2024
September 2024
August 2024
July 2024
June 2024
May 2024
April 2024
March 2024
February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
November 2022
October 2022
September 2022
August 2022
July 2022
June 2022
May 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006

about · archives · contact · register

Copyright © 2006-2024 Captain's Journal. All rights reserved.