Night Owl Optics NOB5X warranty Model Features

Performance under Various Light Conditions

Complete Darkness

Your Night Vision device works by amplifying available natural light. In complete darkness, with no available natural light, you cannot see without the use of the Infrared Illuminator (IR). The IR works like a flashlight, but is

MODEL FEATURES

nA Power Control

nB Eyepieces

nC Infrared Illuminator Control

nD Infrared Illuminator

nE Battery Compartment

nF Objective Lenses

nG Low Battery Indicator

nH Focus Adjustment Knob

Troubleshooting

Unit may require several seconds after power-on for image to appear. This is normal.

Focus Problems

Try in lighted environment with lens cap on.

Are you able to focus the eyepiece?

•YES - Use in dark with lens cap off but do not rotate eyepiece.

•NO - Call our Customer Service Line

Unit does not turn on.

Light does not illuminate when button is pressed.

• Check to see if batteries are installed correctly

• No batteries or Dead batteries

• Power light on, but no image

• Unit could be defective, call our Customer Service Line

invisible to human and animal eyes.

Half-Moon

A half-moon provides a substan- tial amount of ambient light to be amplified by the internal Electronic Intensifier Tube. Without the assistance of the IR, you can recognize a man-sized object about 100 yards away.

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Image is too dark

•Use the Infrared (IR) Illuminator

•Take off the lens cap

Projected image is dim.

• Batteries are low – insert new batteries

HowNightVisionWorks

Light coming into the device from the direction of the object is gathered by the objective lens and focused onto the Image Intensifier Tube.

Quarter-Moon

A quarter-moon provides the

minimal amount of ambient light

to allow viewing unassisted by

the IR. Without the IR illuminat-

ed, a man-sized object can be

recognized about 60 yards away.

With the IR illuminated, this dis-

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The front of the Image Intensifier Tube contains a photocathode which converts light into electrons.

The device contains a very high voltage power supply, which converts the 3 volts supplied by the batteries into 17 kilovolts.

The high voltage hurls the electrons into the phosphorous screen. The phosphorous screen illuminates with an image when struck by electrons. The eyepiece optic then focuses the phos- phorous screen image to your eye.

tance is more than 100 yards.

The IR will greatly improve target

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recognition.

Urban Environment

(with man-made light sources)

Streetlights and headlights will generally not damage the Electronic Intensifier Tube, if a safe distance away. As a precau- tion, do not point the device directly into a light source. At a distance of more than 30 yards, most common man-made light sources will generally not dam- age the device.

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