The DTNVG-14 is a lightweight binocular for the professional user with advanced solid-state technology to control all aspects of its operations using lenses compatible with all PVS-14 accessories. Having full depth perception is key in all sorts of terrain ? with the DTNVG the user will have a very low weight device with all the necessary features. Low profile while folded to the helmet, self-supporting structure while stored and ergonomic design are key aspects of the DTNVG.
In selecting advanced technology, it allowed an expanded feature set with higher reliability and reduced power consumption to extend mission time. In addition, many features were added to the DTNVG to simplify operations, with individual sideways ON/OFF for each eyepiece and Flip-Up ON/OFF when folded up preventing backsplash on the helmet. To complete the DTNVGs? features it incorporates built-in IR LED for close quarter missions with separate IR-ON indicator and low battery indicator in the field of view.
Photonis ECHO image intensifier tube(s) is a huge improvement compared to standard Gen2+ tubes with autogated, higher sensitivity, resolution and signal to noise ratio.
* This unit is AUTOGATED
IIT: Photonis ECHO Green Phosphor
|Luminance sensitivity 2850 K.||/||/||/|
|Radiant sensitivity 830 nm||/||/||/|
|Luminance gain (at 20 μlx)||8000||/||12000|
|Signal to noise ratio||24||21||/|
|Equiv. Background illumin.||/||0.12||/|
|Image Intensifier Tubes (IIT)||Photonis ECHO White Phosphor|
|Diopter compensation||-6 to +2 dpt|
|Battery Life||30 h|
|True field of view||40°|
|Close focus limit||0.25m|
|Power Supply||1x CR123|
|Dimensions||72 x 99 x 112 mm|
The ability of an image intensifier or night vision system to distinguish between objects close together. Image intensifier resolution is measured in line pairs per millimeter (lp/mm) while system resolution is measured in cycles per miliradian. For any particular night vision system, the image intensifier resolution will remain constant while the system resolution can be affected by altering the objective or eyepiece optics by adding magnification or relay lenses. Often the resolution in the same night vision device is very different when measured at the centre of the image and at the periphery of the image. This is especially important for devices selected for photograph or video where the entire image resolution is important. Measured in line pairs per millimeter (lp/mm).
Lp/mm (Line Pairs per Millimeter)
Units used to measure image intensifier resolution. Typically, the higher the line pair, the better the image resolution. Generation 3 tubes generally have a range of 64 72 lp/mm, although line pair measurement does not indicate the generation of the tube. Some Generation 2+ tubes measure 28-38 lp/mm, (Gen 2+ at 54-59 lp/mm typically), while a Generation 1+ tube may have measure at 40 lp/mm.
Photocathode sensitivity is a measure of how well the image intensifier tube converts light into an electronic signal so it can be amplified. The measuring units of photocathode sensitivity are micro- amps/lumen (?A/lm) or microamperes per lumen. This criterion specifies the number of electrons released by the Photocathode (PC). PC response is always measured in isolation with no amplification stage or ion barrier (film). While for most latest 3rd generation image intensifiers the photo response is in the 1800 ?A/lm, but for the latest tubes you can expect min. 2200 ?A/lm.
Signal-to-Noise Ratio (SNR)
A measure of the light signal reaching the eye divided by the perceived noise as seen by the eye. A tubes SNR determines the low light resolution of the image tube; therefore, the higher the SNR, the better the ability of the tube to resolve objects with good contrast under low-light conditions. Because SNR is directly related to the photocathodes sensitivity and also accounts for phosphor efficiency and MCP operating voltage, it is the best single indicator of an image intensifiers performance.
Figure of Merit (FOM)
Image Intensification tube specification designation, calculated on line pair per mm x signal to noise. (FOM=lp/mm * SNR).
This is nothing else then PWM but for image intensifier tubes. Offering the tube better protection and preventing resolution loss in high light conditions.
Black & White Image (White Phosphor, WP)
By using a different kind of phosphor (P45) the image looks like a black & white picture in high definition. For some people these seem to work better than for others. Personal preference.