Troubleshooting Hikvision Security Camera IR Glare -... | terminalfaults.org

Technical Background:

IR glare occurs when infrared light emitted by the camera's LEDs reflects off a nearby surface and back into the lens. This overpowers the image sensor, reducing contrast and detail. The intensity of the glare is influenced by the proximity and reflectivity of the interfering surface, the power output of the IR LEDs, and the camera's IR sensitivity. Voltage fluctuations can also impact IR LED output.

Symptoms:

The security camera image exhibits excessive brightness or a washed-out appearance, particularly in low-light or nighttime conditions. Details in the centre of the image may be obscured by a bright, circular or diffused area.

Possible Causes:

Dust or debris accumulation on the camera lens or IR LEDs, scattering infrared light.
Reflective surfaces (e.g., walls, eaves, windowsills) positioned too close to the camera.
Spider webs or insects directly in front of the camera lens reflecting IR light.
Excessive IR LED power output, especially in confined spaces.
Incorrect camera settings, such as excessive IR intensity or exposure compensation.
Voltage instability from the power supply affecting IR LED brightness.

Solution:

1

Clean the camera lens and IR LEDs with a soft, dry, lint-free cloth. Avoid abrasive cleaners that could scratch the lens.
2

Adjust the camera's IR settings via the web interface or NVR. Reduce the IR intensity or enable 'Smart IR' if available.
3

Reposition the camera to minimize proximity to reflective surfaces. Consider using a longer mounting arm or different mounting location.
4

Check the camera's power supply voltage. Ensure it meets the camera's specifications. A faulty power adapter can cause voltage fluctuations.
5

Inspect the area around the camera for spider webs or insects and remove them.
6

If the camera has a weatherproof housing, ensure it is properly sealed to prevent moisture ingress, which can exacerbate glare.
7

Consider using an external IR illuminator positioned further away from the camera to provide more even lighting and reduce direct reflections.

Safety Warning:

Before performing any maintenance, unplug the camera from its power source for Safe Handling. Avoid touching the lens with bare fingers. Do not use excessive force when cleaning the lens or LEDs. Ensure the power supply is properly grounded to prevent electrical hazards.

Prevention:

Regularly inspect and clean the camera lens and IR LEDs. Monitor camera performance and adjust IR settings as needed. Use a surge protector to protect the camera from voltage spikes. Ensure proper cable management to prevent damage and signal degradation.

Expert Tip:

Try covering the IR LEDs with electrical tape, leaving only a few exposed. This reduces the intensity and may eliminate the glare, especially in areas with existing ambient light. As an alternative, adjust the camera's digital noise reduction (DNR) settings to reduce image noise caused by lower IR intensity.

Frequently Asked Questions

•What are the ideal voltage and current requirements for my camera model?

Consult the manufacturer's datasheet for the specific voltage (V) and current (A) requirements of your Hikvision camera. Using an incorrect power supply can damage the device.

•Where can I find the IR settings on my Hikvision camera?

Access the camera's web interface or the NVR (Network Video Recorder) interface. Navigate to the 'Image' or 'Camera' settings, where you should find options to adjust IR intensity, Smart IR, and other related parameters.

•What type of cloth is best for cleaning the camera lens?

Use a microfiber cloth specifically designed for cleaning lenses. These cloths are lint-free and non-abrasive, minimizing the risk of scratches. Avoid using paper towels or tissues, as they can leave behind fibres.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What are the ideal voltage and current requirements for my camera model?

•Where can I find the IR settings on my Hikvision camera?

•What type of cloth is best for cleaning the camera lens?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: