The night vision devices are those that contributes night vision. Based on the quality and feature of the image, the devices can be classified into class A, class B, and class C. Class B type devices filter the images from 610 to 665 nanometer.
This device allows only the orange and red spots to enter into the system, and it views the images in multiple colors. The capability of this device under low light condition is very low, compared to the devices of the other classes. The class B devices are used in many places. Wherever there are any NVIS lightening components, the class B devices are used for viewing those components. Hence, these devices are commonly used on aircraft and in other machinery.