does it have any military application?
They are used by the military and law enforcement agencies.
Night-vision device
NVDs are most often used by the military and law enforcement agencies, but are available to civilian users.
where did the term cat call come from UNANSWERABLE how big are they usually? UNANSWERABLE what type of species are they? The cat is a domestic species of small carnivorous mammal. how does their eyes work? The domestic cat has slit pupils, which allow it to focus bright light without chromatic aberration. can they see in the dark? Cats have excellent night vision. what is this mentioned vision about? Night vision is the ability to see in low-light conditions. what technologies can be used to achieve this? Image intensification, active illumination, and thermal imaging. what are the few devices related to this technology? Night optical/observation device and night-vision goggles.
wiki:12093240
Night-vision device [SEP] Introduction
A night-vision device (NVD), also known as night optical/observation device (NOD) and night-vision goggles (NVG), is an optoelectronic device that allows images to be produced in levels of light approaching total darkness. The image may be a conversion to visible light of both visible light and near-infrared, while by convention detection of thermal infrared is denoted thermal imaging. The image produced is typically monochrome, e.g. shades of green. NVDs are most often used by the military and law enforcement agencies, but are available to civilian users. The term usually refers to a complete unit, including an image intensifier tube, a protective and generally water-resistant housing, and some type of mounting system.