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With the growing awareness of security among consumers across various industries, China's security sector is experiencing significant growth. Traditional daytime real-time monitoring is no longer sufficient to meet modern demands, leading to a rising preference for all-weather, seamless security systems. As a result, infrared cameras, including low-light night vision models, have become increasingly popular and are now considered a standard in the industry.
**Tips for Infrared Lamp Installation**
1. It is essential to adjust the infrared lamps at night using a monitor or similar device to ensure proper beam positioning. This allows for fine-tuning of the lens aperture for optimal performance.
2. Avoid pointing the infrared light directly at the camera. When the camera captures the infrared light, it appears as white light, which can cause overexposure and an "anti-white" effect in the image.
3. The infrared lamp does not need to be installed in the same location as the camera. If the camera is far from the target, consider placing the lamp between the two. Ideally, install them in the same spot with overlapping coverage for best results.
4. The installation height of the infrared lamp should not exceed 4 meters, as higher placement may reduce light reflectivity. The angle should be set at about 20 degrees downward to ensure effective illumination.
5. Make sure the power supply for the infrared lamp meets the required specifications. The power must be sufficient to support the lamp’s operation.
6. Always read the user manual carefully before using the infrared lamp. Pay attention to safety guidelines and check if all supporting requirements are met. Adjust the equipment if necessary to ensure optimal performance.
**Infrared Camera Considerations**
Angle issues: Using a wide-angle infrared light with a narrow viewing lens can lead to inefficient light usage. Additionally, the direction of the infrared light emission affects image quality—better lighting doesn’t always mean better visibility.
Light transmission: The relative aperture of the lens determines how much light it can capture. A lens with an f/1.0 aperture lets in four times more light than an f/2.0 lens. When paired with the same camera and infrared lamp, this can double the effective range. Large-aperture lenses significantly improve infrared performance, making them essential for night vision. However, due to cost and technical challenges, most manufacturers do not offer such high-quality options.
Focus shift: Visible and infrared light have different wavelengths, causing the focus to shift between day and night. This can result in blurry images during nighttime when using infrared. Solutions include using auto-focus cameras, specialized non-shift lenses, or professional tools to adjust focus under existing conditions.
Color issues: Black-and-white cameras are highly sensitive to infrared light, while color cameras treat it as stray light, potentially reducing image clarity and color accuracy. To address this, color cameras can either switch filters to block infrared light during the day or use a specific infrared channel that allows only the desired wavelength to pass through. While the first method offers better image quality, it increases cost and failure risk. The second option is more affordable but slightly reduces color fidelity.
In conclusion, infrared night vision technology has advanced significantly. With the right combination of infrared light, sensors, and lenses, systems capable of detecting objects over 100 meters away are now achievable. While commercial products can reach beyond 500 meters, they remain expensive and are primarily used in professional settings. As technology continues to evolve, we can expect even greater advancements in the future.