Laser threat?-Our Solution

Previous
Next

The laser filter is engaged by the wearer by tilting down the head such that the laser beam is intersected by the filter to drop the intensity below the maximum permissible levels for eye exposure. These levels are agreed at international committee level using values generated by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) which is an international commission specialized in non-ionizing radiation protection, these values are adopted by the International Electrotechnical Commission (IEC) which is an international standards organization that prepares and publishes international standards for all electrical, electronic and related technologies – collectively known as “electrotechnology”. IEC 60825 has provided laser limit values which are then incorporated into all national standards bodies, which in the US is ANSI and the laser safety standard is ANSI Z136.

Normally when an officer is under attack from a laser pointer, the attacker will attempt to illuminate the officers eyes from a distance (usually in the evening or night) and will try to direct the laser beam toward the officers eyes by visualizing the beam somewhere near the officer and then targeting the officers eyes. From the officers viewpoint the end of the laser pointer will immediately become visible enabling the officer to tilt their head to engage the filter. This requires the officer to have and maintain full operational visibility during normal operation and when under attack to lower the visor filter and mitigate laser attack. Hence the need for the officer with normal vision to be able to use the visor then intersect an intended attack prior to the assailant bringing the laser beam into the officers eyes. As such the filter enables the officer to maintain normal operations using the visor for operational protection and only when subjected to laser attack can the officer introduce the additional safety protection of the laser filter.

The filter is located above the normal officer eye line and as such does not normally provide a distraction or corrupt the normal vison of the officer through their public order visor. Once used for defense of the officer against laser attack the filter like all similar protection equipment must be immediately replaced. A new strip can be fitted to replace the used filter. An important feature of the filter strip is that whilst being used to protect the officer from laser attack the location of the laser beam on the filter is shown as a red dot, this enables the officer to see when the attack has concluded and also maintain the beam in the center of the filter for maximum protection.

The design of the filter is such that usual laser targeting equipment used by the officer on response equipment is still visible through the filter, thus ensuring full operability during attack. The filter relies upon the officer to engage the filter prior to the attacker bringing the laser beam into the officers eyes. It must be used in conjunction with suitable training and provides adequate protection when used appropriately and replaced once used.

The notional attenuation of the laser filter material was specified to be approximately equal to 0.1% or better at the two chosen laser frequencies, 405nm(blue) and 532nm(green). This would be equivalent to reducing the power of a 1000mW handheld laser to 1mW (0.001W), a figure that is unlikely to result in permanent eye damage.

We can provide figures for violet 405nm lasers on request. If users want higher levels of attenuation, we can supply those as well, but these performance levels above are the ones selected by UK Government scientists for UK police adoption after extensive evaluation.

This entire project and its science have been fully assessed and approved by United Kingdom Home Office Center of Applied Science & Technology (CAST) scientists before issue to UK police and others.

The self-adhesive visor strips can be custom cut to fit virtually any application.

Easy to attach and can follow complicated contours. If you have a specific shape or problem to solve Laser Optical Engineering in the UK will create a bespoke solution.


Scroll to Top