Night Optics TG-7 Thermal Goggle/Binocular (30Hz) - Manual (Page 5)

SECTION I: OPERATOR INSTRUCTIONS
CAUTION
DO NOT REMOVE THE HOUSING.
THERE ARE NO USER SERVICEABLE PARTS INSIDE.
REFER ALL SERVICING TO NIGHT OPTICS USA, INC.
Chapter 1. Introduction
1-1. Description:
The NO/TG-7 Thermal Goggle/Binocular is a rugged, lightweight and powerful Infrared optic that can be
hand-held, helmet mounted, or mounted on a head harness. By using the 2X internal digital zoom and
adding an optional afocal germanium optical lens, the NO/TG-7 provides potent 6X long-range thermal
surveillance and acquisition.
The sensitive uncooled thermal detector and high resolution display provides crisp “white hot” or “black
hot” images regardless of ambient conditions. A colorized capability is available at user request. While
night vision technology relies on amplification of ambient light or assisting illumination, thermal
devices are completely passive, sensing extremely minute temperature differentials. The NO/TG-7
Thermal Goggle therefore acquires targets in daylight and complete darkness while “seeing through”
obscurants such as smoke and haze which often hinder image intensification devices.
Designed for law enforcement, military and commercial use, the NO/TG-7 is ideal for reconnaissance and
surveillance, perimeter security, wildlife observation and control, locating oil spills, and geo-thermal
event monitoring in addition to a wide variety of other applications.
1-2. What is Infrared?
Infrared energy, often referred to as “infrared” or “IR”, is electromagnetic radiation that travels in a
straight line through space, the same as visible light. Although infrared energy shares some of the
properties of visible light, its different wavelength has several unique characteristics. For instance,
materials that are opaque to visible light may be transparent to infrared, and vice versa. An example of
this difference is the ability of light intensification devices to see through glass and plastic while thermal
detection devices cannot. Unlike visible light, given off by ordinary objects only at very high
temperatures (e.g. light bulbs), long-wavelength infrared (7-14 mm) is emitted by all objects at ordinary
temperatures. This means that infrared energy surrounds us all the time, even in the dark. Different
objects emit varying amounts of infrared energy depending on the temperature of the object. The
NO/TG-7 is designed to sense differing contrasts of long-wavelength infrared energy and display the
scene in real time for the user.
1-3. Theory of Operation:
The NO/TG-7 combines a highly sensitive, 30μm 160x120 uncooled, Amorphous Silicon Microbolometer
detector yielding a real-time 30Hz frame rate with a 640 X 480 LED display integrated and sealed in a
modified PVS-7 housing. With thermal sensitivity of less than 50mK, the sensor has a 7-14μm spectral
response. The 1°x8° field of view provided by the 25mm lens facilitates detection of human activity to
475 meters. Additional integrated features include focus adjustment, white-hot/black-hot polarity
options, contrast and brightness adjustment, 2x digital zoom, hand-held battery operation, NTSC
video-out capability and external power function. The sealed system has a nitrogen purge screw in the
rear cover assembly.