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In today's world, consumer awareness of security has significantly increased across all industries, leading to rapid development in China's security sector. Traditional daytime real-time monitoring is no longer sufficient for modern security needs. As a result, all-weather, seamless security monitoring systems have become increasingly popular among engineers and end-users. This has driven the widespread adoption of infrared cameras, including low-light night vision models, making them a growing trend in the market.
**Installation Tips for Infrared Lights**
1. It is best to adjust infrared lights at night using a monitor or other imaging device. This allows for precise positioning of the infrared beam and proper adjustment of the lens aperture.
2. Avoid pointing the infrared light directly at the camera. If the camera captures the infrared light as it would daylight, it may cause an overexposed or "anti-white" effect on the image.
3. The infrared light doesn't need to be installed in the same location as the camera. If the camera is far from the object being monitored, consider placing the infrared light between the two. Ideally, install the infrared light and camera in the same spot for optimal performance.
4. The installation height of infrared lights should not exceed 4 meters, as higher placement can reduce the effectiveness of light reflection. The angle should be set at about 20 degrees downward to ensure proper coverage.
5. Ensure that the infrared light's working indicator (as specified in the product manual) is functioning properly. The power supply must be strong enough to support the infrared light’s operational requirements.
6. Before using the infrared light, read the user manual carefully. Pay close attention to safety instructions and check whether all supporting components meet the necessary standards. If any factors are missing, make adjustments promptly to ensure safe and effective operation.
**Important Considerations for Infrared Cameras**
Angle issues: Using a wide-angle infrared light with a narrow viewing angle lens can lead to wasted light. Additionally, the best image quality isn't always achieved when the infrared light aligns perfectly with the camera's view.
Light transmission: The relative aperture of the lens determines how much light passes through. 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 provide significantly better infrared performance compared to standard lenses, making them essential for night vision monitoring. However, due to high costs and technical challenges, most manufacturers do not offer such lenses.
Focus shift: Visible light and infrared light have different wavelengths, causing the focus point to shift between day and night. This can result in blurred images during nighttime when using infrared lighting. To solve this, you can use an auto-focus camera, a non-shift focusing lens, or professional tools to adjust the focus manually.
Color issues: Black-and-white cameras are sensitive to infrared light, while color cameras treat it as stray light, which can reduce image clarity and color accuracy. Color cameras typically use filters to block infrared light under visible light conditions. There are two approaches to enable infrared sensing: one involves switching the filter, which improves image quality but increases cost and failure risk; the other uses a special filter that allows specific infrared wavelengths to pass through, offering a more affordable but slightly less accurate color reproduction.
In summary, modern infrared night vision technology can achieve distances of over 100 meters. However, this requires mastery of three key technologies: infrared lighting, infrared sensor cameras, and infrared sensor lenses. While commercial products now reach up to 500 meters, they remain expensive and primarily used in specialized applications. As technology advances, we can expect more affordable and accessible solutions in the future.