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 has expanded, hemispherical cameras have gained popularity, especially for indoor use, due to their ease of installation, simple debugging, and discreet appearance. For instance, they are often used in environments where ceilings and lighting remain unchanged. But despite their advantages, dome cameras can sometimes encounter technical issues. Here are some common problems and solutions. **Problem 1: Poor night illumination with white or bright white spots in infrared dome cameras** This issue is typically caused by improper assembly. If the photosensitive device (photoresistor) is positioned too far from the infrared lens during installation, it may fail to trigger the infrared lights properly, resulting in weak night vision. The white or overly bright spots on the image are usually due to infrared light being refracted through the dome cover and reflecting directly into the lens. To fix this, it’s important to prevent the infrared light from reaching the lens. A common solution is to use a sponge ring to create a barrier between the lens and the infrared source, ensuring the dome cover is securely fastened during assembly. **Problem 2: Vertical lines or stripes appear on the screen** This is usually caused by excessive voltage ripple from the power supply. To resolve this, it's recommended to improve the filtering system and use a high-quality DC power supply that provides stable output. **Problem 3: Color distortion or color cast in infrared dome cameras** This can happen if the automatic white balance (AWB) is not correctly set or if there are significant changes in ambient lighting. It’s essential to check whether the AWB switch is turned off and consider improving the lighting conditions in the environment for better performance. **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 insufficient sealing of the housing and inadequate consideration of temperature differences during operation. When the infrared lamp is active, it generates heat, but if the camera casing isn’t designed for efficient heat dissipation, this can lead to performance issues. A good solution is to design the housing with multiple vented sections to allow proper airflow and heat release. **Problem 5: Dome camera works normally during the day but appears white at night** This is commonly due to reflections in the environment or an overly small space. Infrared light can reflect off surfaces, causing the image to appear excessively bright. First, assess the environment for potential reflections and try to optimize the setup. Then, check if the effective infrared range matches the actual usage distance. Using a long-range infrared camera in a small area may cause the image to be overexposed due to strong infrared light. By understanding these common issues and applying the right solutions, users can ensure their dome cameras operate efficiently and reliably in various environments.

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