Kāpēc ir it tas nakts redze ierīces ir baidās stiprs gaisma?
Tur ir daudz veidi of nakts redze ierīces, bet tie pamatā konsist of an optiskā sistēma, a mainīgais attēls caurule vai a vājā apgaismojumā caurule, a jauda padeve un a power supply system. Of course, active infrared night vision devices must also be equipped with infrared searchlights, in which the variable image tube or low-light tube is the "heart" of the night vision device. Mainīgais attēls caurule var konvertēt neredzamais infrasarkanais attēls uz a redzamais attēls, kamēr vājš apgaismojums caurule var uzlabot vājš gaisma desmitiem tūkstošiem vai pat simti tūkstošiem reizes % 2c padarot tas nosakāms ar cilvēku aci.
Night vision devices are afraid of strong light because the image change tube and low-light tube are afraid of strong light. Taking the variable image tube as an example, when infrared light shines on the photocathode of the variable image tube, the photocathode emits electrons. Under the action of the high-voltage field (16 to 21 kV) and the electron lens, the electrons accelerate toward the fluorescent screen, causing the fluorescent screen to Displays a visible target image. The more light signals the variable tube receives, the more electrons are emitted. The light signals emitted by the fluorescent screen are stronger, and the images seen are brighter. They are basically proportional. However, if the external light is too strong, the number of electrons emitted by the photocathode will stop increasing to a certain extent, that is, it will be saturated, and the target will not be visible clearly. If too strong light suddenly strikes, it may burn out the photocathode of the tube and prevent it from emitting electrons. Of course, nothing can be seen.
Lai gan nakts nakts redze ierīce ņem noteikti pasākumi to novērst stiprs gaisma, tā efekts ir ierobežots, so it ir jābūt jādarbojas stingri saskaņā ar to noteikumiem noteikumiem kad lietošana it. Kad sastapšanās stiprs gaisma vai kalibrēšana mērķis mērķis laikā diena, put on mērķis objektīvs vāks vai izslēgt the power switch. Proper use of night vision devices can extend their service life and avoid un nevajadzīgi bojājumi, tādējādi dod full play uz the role of night vision devices.
