Hemisphere camera common problems and solutions

Over the years, dome cameras have become a key component in our surveillance systems. As the scope of monitoring applications has expanded, hemispherical cameras have gained popularity, especially for indoor use, due to their easy installation, convenient debugging, and discreet appearance. For instance, in environments where ceilings and lighting remain unchanged, dome cameras are often the preferred choice. But like any technology, they can face certain challenges. Here are some common issues with dome cameras and how to address them. **Problem 1: Poor Night Illumination and White or Bright Aperture in Infrared Dome Cameras** This issue is usually caused by improper assembly. If the photoresistor is placed too far from the infrared lens during installation, the infrared lamp may not activate fully, leading to weak night vision. The white or bright spot on the image is typically due to infrared light being refracted through the dome cover and directly hitting the lens. To fix this, ensure that the dome cover is tightly sealed and use a sponge ring to isolate the lens from the infrared light source. Proper assembly is essential for optimal performance. **Problem 2: Vertical Bars or Lines on the Screen** This problem is often linked to high ripple in the power supply voltage. To resolve it, improve the filtering system and use a high-quality DC power supply to stabilize the output. **Problem 3: Color Distortion or Color Cast in Infrared Dome Cameras** This can occur if the auto white balance (AWB) is not properly configured or if there are significant changes in ambient lighting. Check whether the AWB is set to the correct mode and try to enhance the lighting conditions in the environment. **Problem 4: Deterioration of Waterproofing and Heat Dissipation** After prolonged use, moisture can accumulate inside the camera, especially in colder regions like northern China. This is often due to poor sealing and inadequate consideration of temperature differences. When the infrared lamp operates, it generates heat, and if the camera housing isn't designed well, heat dissipation becomes an issue. A solution is to design the casing with multiple ventilation channels to improve airflow and reduce internal temperature. **Problem 5: Normal Daytime Image but White at Night** This usually happens when there's reflection in the environment or when the space is too small. In such cases, the infrared light reflects off surfaces, causing overexposure. First, assess the environment for reflections and make adjustments if possible. Then, check if the infrared range of the camera matches the actual usage distance. Using a long-range infrared camera in a confined space can result in a white image due to excessive infrared light intensity. By understanding these common issues and applying the right solutions, users can significantly improve the performance and longevity of their dome cameras. Whether you're installing in a home, office, or public space, proper setup and maintenance are key to ensuring clear, reliable surveillance.

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