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.
Many NVDs also include optical components such as a sacrificial lens, or telescopic lenses or mirrors. An NVD may have an IR illuminator, making it an active as opposed to passive night vision device.
The Digisight LRF features integrated laser rangefinder. The laser rangefinder with range up to 400 m allows to measure distance in single measuring mode and in scanning mode. It operates in THD (True Horizontal Distance) measuring mode with displaying angle of elevation on the screen of the riflescope as well.
The new Digisight LRF has magnification 4.5x and it can be increased with help of smooth zoom up to 9х. The riflescope’s internal memory contains 13 reticles of various shapes intended for various types of hunting or rifles (smooth-bore, rifled, pneumatic guns and crossbow). The central part of the reticles is illuminated; color can be changed from red to green. The color of the main part can be switched from black to white.
The software of the riflescope allows the user to save in riflescope’s memory three points of impact for three various distances, and each option allows the use of a dedicated reticle.
The Digisight LRF N870 is equipped with built-in laser IR illuminator working in “invisible” wave range. It allows the customer to use the device in active mode without scaring off the game.
The new riflescope features optimized control and advanced functionality (the device has new functions, such as automatic switch off option, electronic control of side incline function et al.).