Infrared lamps operate under specific current conditions. Typically, the radiation power of an infrared lamp increases with the forward operating current, but when approaching the maximum rated current, excessive heat generated by the current can cause a drop in optical output. If the current is too low, the emitted power will be insufficient, while excessively high current can reduce the lifespan of the lamp or even cause it to burn out.
Once the voltage exceeds the threshold (around 0.8V), current begins to flow rapidly, indicating that the operating current must be precisely controlled. Any instability in current can negatively impact the performance and reliability of the infrared emission. Additionally, as ambient temperature rises due to internal heat generation, the emitted power may decrease. For long-range infrared lamps, thermal management is a critical design consideration.
To ensure optimal performance, infrared lamps require a stable constant-current power supply and efficient heat dissipation. Midway Communications' MCD, MDD, MED, and MBB series cameras are equipped with high-power infrared LEDs (up to 24) powered by a robust constant-current source. These models also feature internal heat circulation systems, allowing them to achieve long-range night vision (up to 220 meters) and extended lamp life.
Another important issue is the "red storm" effect, which occurs when infrared lamps emit visible red light. This can be minimized by using 940–950nm infrared diodes, which are nearly invisible to the human eye. Midway Communications employs AUCSITER infrared technology to reduce heat and optimize the infrared beam angle, achieving over 90% efficiency. They also use longer wavelength infrared (around 910nm) to further suppress the red glow, ensuring a more discreet and effective infrared illumination.
Fogging and frosting on infrared camera lenses are common issues caused by condensation from moisture in the air. This is especially problematic for outdoor cameras exposed to temperature fluctuations, rain, or snow. To address this, Midway Communications has integrated advanced electronic defrosting circuits that control humidity levels inside the housing, enabling automatic defogging and defrosting.
In environments with dust, rain, or snow, the protective window of the camera can become dirty, obstructing the view. Solutions include mechanical wipers or "invisible wiper" glass that repels water, dust, and ice. The latter offers a more durable and maintenance-free option, enhancing visibility in harsh weather conditions.
Infrared cameras generate significant heat during operation, especially when using high-power infrared lights. If not properly managed, this heat can lead to uneven temperature distribution within the housing, potentially affecting the camera’s performance. Midway Communications solves this by incorporating an automatic air conditioning system based on the Peltier effect, which maintains a stable internal temperature between +5°C and +40°C. This ensures reliable operation in extreme temperatures, from -40°C to +70°C, even in direct sunlight.
Beyond temperature control, the air conditioning system allows for a fully sealed design, eliminating cooling vents that could let in dust, moisture, or corrosive gases. This makes the camera suitable for use in challenging environments such as coal mines, where durability and reliability are essential.
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