Common faults and maintenance methods of low-light night vision devices

The following are common faults and solutions for low-light night vision devices. If the fault is not listed below or the problem cannot be solved according to the following instructions, you can consult us and our optical engineers will give you a good solution.

When the night vision device fails to power on:

(1) Check whether the battery is placed according to the positive and negative polarity instructions.
(2) Replace with new battery.
(3) Wipe the battery compartment clean, especially the battery contact points.

When the observed image flickers:

This shows that the ambient light is too strong, such as when observing at dusk. The power should be turned off and the objective lens protective cover should be replaced. When the illumination does not exceed 0.1 lux, such as under a full moon, the night vision device will return to normal operation.

No image or the image cannot be focused:

(1) Refocus by adjusting the objective lens, and if necessary, reset the diopter by rotating the eyepiece.
(2) Check whether the surfaces of the objective lens and eyepiece are clean. If necessary, wipe them clean with a lens cleaning cloth.
(3) Replace with new battery.
(4) Turn on the built-in infrared auxiliary light source when the ambient illumination is extremely low.

When the image disappears or the quality deteriorates:

(1) Automatic power off can prevent the body from being damaged by excessive light. Covering the objective lens protective cover can ensure that the equipment works properly when it is first started. You should turn off the power first and wait for the light to dim before observing again.
(2) If it is suddenly hit by a strong light source, such as a street light, the clarity of the image may be weakened or disappeared. You should move away from the light source immediately, and the image will return to normal within a few minutes.

Image quality notes:

(1) The image seen through a night vision device is completely different from the image seen through an ordinary telescope during the day. Night vision devices use electronic amplification and then display the image on a screen, so the clarity is not as clear as the image seen through daytime telescopes.
(2) The electronic imaging tube will produce a snowflake background on the image, which is a very normal phenomenon.
(3) Electronic imaging tubes will have certain irregular black spots, which can be seen when observing at a close distance. But it does not affect the observation. This is a normal phenomenon and is not a quality issue. It is not that the equipment is defective or of poor quality, so it will not affect the stability and performance of the equipment.

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