Laser monitoring sounds very high-tech
But the principle is simple.
When someone is talking in the room
Glass vibrates slightly.
Then the laser is thrown on the glass.
The laser reflected from the glass contains the information of sound vibration in the room.
When people receive it outdoors, they can restore sound signals.
It's like a child playing with a paper cup on a pull-line phone.
It's just a laser instead of a line.
Because laser monitors don't need to be placed in the other party's office.
So it's hard to find out.
And the effective receiving distance is more than 1000 meters.
laserMonitorUsed to steal trade secrets
What's the effect of this kind of monitoring through glass?
Is the sound restoration high or low?
Curiosity Jun did a test with the cooperation of relevant departments.
Curiosity Jun sits in a closed car chatting
About 300 metres from the car
Testers use professional equipment and instruments to monitor
The decibel of normal speech is 60-70DB.
Quietly whispering decibels also have 40-50DB
Testers tested both cases separately.
Results Testers 300 meters away
You can hear the voice of the experimenter.
Despite the current murmur
But there's no problem hearing what's said.
Sound is produced by vibration, and sound can also cause the vibration of surrounding objects. "Laser monitoring" technology refers to the use of laser to achieve the purpose of monitoring by striking objects near the sound source through a laser invisible to the human eye and collecting the vibration caused by the sound source. Anti-laser monitoring film, through laser interception of laser monitoring equipment, to achieve the purpose of anti-excitation monitoring.
With nanotechnology, the products have the advantages of high transmittance, strong consistency, long service life and stable index.
IMPORTANT CHARACTERISTICS: The appearance of anti-laser monitoring film is identical with that of common window film. You can't see the difference without professional equipment!
Detection technology anti-laser monitoring paste film, is on the market after five mainstream domestic laser listening equipment, three foreign laser listening equipment combat detection verification, with blocking effect!
Characteristic of blocking film for laser monitoring in Thomson Science and Technology
It has high-level protection effect, long service life, good weather resistance and other characteristics. It also provides the function of laser detection, periodically inspects the protective film, and can detect whether it is monitored by laser. Anti-laser monitoring film, through laser interception of laser monitoring equipment, to achieve the purpose of anti-excitation monitoring. With nanotechnology, the products have the advantages of high transmittance, strong product consistency, long service life and stable index.
Scene of laser monitoring blocking film
For government departments, offices, homes, etc.Architectural glassLaser surveillance protection;
Laser-proof monitoring for glass of automobile, ship, airplane and other special vehicles;
It can be used in other areas where laser monitoring is required.
Installation method of anti-laser monitoring film
It is suggested that the indoor layer installed on the window can achieve the same protective effect as that installed outdoors, while greatly reducing the construction difficulty and prolonging the service life.
Step 1: Preparing kettles, non-woven fabrics, plastic scrapers, rubber scrapers and artistic blades;
Step 2: Clean the window glass with detergent.
Step 3: Cut out the corresponding size of the window film according to the size of the window.
Fourth step: dispensing installation liquid: add appropriate amount of neutral detergent in water (bath lotion is better), put into spraying pot, spray evenly on the glass surface;
Fifth step: paste the film on the wet glass surface;
Step 6: Use a scraper to squeeze out water and bubbles.
Step 7: Clean the surface with a dry cloth and install it.