नाइट विजन डिवाइस और थर्मल इमेजर के बीच अंतर
1. प्रभावशीलता
1) If you have used ordinary night vision devices, you will find that the observation feeling of night vision devices and ordinary infrared thermal imagers is completely different. This is because the general night vision device directly observes the target through the lens, so the field of view seen is the same as that seen by the telescope lens, which is circular and the picture is green. If the clarity is enough, it is possible to identify who the target of the character is and to see the facial features of the person clearly.
2) The infrared night vision thermal imager sees the image on the internal LCD screen instead of directly seeing the target, so the field of view is square. The imaging of the infrared night vision thermal imager will be based on the temperature distribution. The higher the temperature, the brighter the brightness. On the contrary, the lower the temperature, the darker the color. The main purpose is to find the target and identify the target category, such as the target is a person, an animal, etc.
2. प्रकाश कारकों का प्रभाव
1) इमेजिंग सिद्धांत के कारण दूसरी पीढ़ी प्लस नाइट विजन डिवाइस पर्यावरण से बहुत प्रभावित होता है। विशेष रूप से प्रकाश के प्रभाव में, जब प्रकाश मंद हो जाता है, तो अवलोकन दूरी कम हो जाएगी। कुल अंधेरे के मामले में, सहायक अवरक्त प्रकाश स्रोत का उपयोग किया जाना चाहिए, और सहायक अवरक्त प्रकाश स्रोत की दूरी आम तौर पर केवल 100 मीटर तक होती है। साथ ही, वे मजबूत प्रकाश से भी डरेंगे, हालांकि कई पारंपरिक नाइट विजन उपकरणों में मजबूत प्रकाश सुरक्षा है। हालांकि, अगर परिवेश की चमक बहुत बदल जाती है, तो इसका अवलोकन पर बहुत प्रभाव पड़ेगा।
2) Infrared thermal imaging night vision device will not be affected by light. Whether it is day or night or rainy, snowy or foggy days, the target object can be clearly observed. It is for this reason that top car night vision devices, such as Mercedes-Benz and BMW, use infrared thermal imagers.
The night-time external sight with the image intensifier as the core device does not use infrared searchlights to illuminate the target when it works, but uses the light reflected by the target under weak light to be enhanced into a visible image that the human eye can perceive on the fluorescent screen through the image intensifier to observe and aim. Target. Infrared night vision device is a military night vision device using photoelectric conversion technology. It is divided into two types: active and passive: the former uses infrared searchlights to irradiate the target, and receives reflected infrared radiation to form an image; the latter does not emit infrared rays, but relies on the target's own infrared radiation to form a "thermal image", so it is also called "thermal image". instrument".
