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Infrared camera common technology debugging
**First, Installation Precautions**
1. Infrared light debugging should be done at night. Adjust the infrared beam’s illumination position using a monitor or other imaging device during nighttime. This allows for better control of the lens aperture settings and ensures optimal performance.
2. Avoid pointing the infrared light directly at the camera. The camera will perceive the infrared light in the same way humans see sunlight, which can cause overexposure or reduce image quality.
3. The infrared lamp doesn’t need to be installed in the same location as the camera. If the camera is far from the object being illuminated, consider placing the infrared lamp between them. Ideally, install the lamp and camera in the same position to maximize coverage and effectiveness.
4. Keep the installation height of the infrared lamp below 4 meters. Too high an installation may reduce the reflectivity of the light. The angle should be set at a 20-degree downward tilt; a steeper angle may prevent effective reflection.
5. Ensure the infrared lamp’s working indicator is functional (refer to the product manual for details). For example, the power supply must be sufficient to meet or exceed the lamp’s operational requirements.
6. Before using the infrared light, read the user manual carefully, especially the safety instructions. Check if all supporting components meet the necessary specifications and consider any environmental factors that might affect performance. If any issues are found, adjust the equipment promptly.
**Second, Usage Considerations**
Angle: Using a wide-angle lens with a large viewing angle can lead to wasted infrared light. A narrower emission angle usually provides better coverage and more efficient use of the light.
Light transmission: The relative aperture of the lens determines its light transmission capability. A lens with an f/1.0 aperture allows four times more light than an f/2.0 lens. When paired with the same camera and infrared light, this can double the effective range. Large-aperture lenses significantly improve infrared monitoring performance compared to standard lenses, making them essential for night vision systems. However, due to cost and technical challenges, most manufacturers do not offer such lenses.
Focus shift: Visible light and infrared light have different wavelengths, causing their focal points to differ. This can result in blurred images during nighttime when using infrared light, even if the daytime images are clear. To solve this, you can use a camera with auto-focus, a specialized non-shift focus lens, or professional adjustment tools to fine-tune the focus.
Color issues: Black-and-white cameras are sensitive to infrared light, while color cameras treat it as stray light under visible light conditions, which can degrade image quality and color accuracy. Color cameras typically have filters that block infrared light. There are two ways to enable infrared sensing: one involves switching the filter to block infrared light during the day and remove it at night, which offers good image quality but higher costs and potential mechanical failures. The other method is to allow a specific infrared wavelength through a modified filter, which is cost-effective but slightly reduces color accuracy.
How far can infrared night vision reach? With advanced technology, infrared night vision systems can easily cover distances over 100 meters. True long-range performance requires mastering three key technologies: infrared lighting, infrared sensor cameras, and infrared sensor lenses. All three are essential. Systems capable of reaching over 500 meters exist, but they come with high costs and are still limited in the consumer market.