Low Type Heavy-duty Industrial Caster Low Type Heavy-Duty Industrial Caster,Industrial Caster,Nylon Wheel,Universal Casters BENYU CASTERS & WHEELS CO.,LTD , https://www.benyucaster.com
Why Does an Infrared Camera Show "Whiteout" and Glare at Night?
1. **Manual Manufacturing Issues**
When infrared cameras are assembled by hand, the infrared light may not be focused properly, leading to astigmatism or scattered light. This scattered light can create a grayish appearance on the image. Additionally, if the infrared filter is not tightly sealed, the concentrated red light from the infrared source may spread out, resulting in a washed-out or overly bright effect.
2. **Insufficient Power Supply Causes Snow Effect**
Some outdoor systems use a 12V centralized power supply for short distances, which is convenient but not ideal for long-range infrared lighting. As the distance increases, the heat generated by the infrared lamps also rises, and the 12V power supply may become unstable, causing insufficient power. Cameras without built-in heat sinks are more likely to overheat and fail under such conditions. Additionally, current fluctuations can cause the infrared lights to flicker or not function properly. When the CCD's illumination is too high, the infrared light’s assistance becomes ineffective, leading to a snow-like noise in the image.
3. **Low-Quality Infrared Lights and Misalignment**
Many manufacturers mix different angles of infrared lights to simplify installation and purchasing. While this might allow compatibility with various lenses, it often results in poor lighting performance. The mismatch between the infrared angle and the lens can lead to issues like over-illumination (flashlight effect) or narrow coverage. This misalignment causes uneven lighting and contributes to the snow effect.
4. **Poor Circuit Design**
Infrared cameras aren’t just about placing infrared LEDs inside the camera and connecting them. A proper design involves circuit redesign and aging tests before installation. However, many small factories use cheap components, low-quality infrared lamps, and simply solder them in place without proper testing. Some low-end manufacturers even combine the control board and the LED board, leading to instability and overheating. This results in poor infrared light quality and, in some cases, complete failure of the infrared function.
5. **Dust and Environmental Factors**
In outdoor environments, especially in fields or dusty areas, the infrared lamp may illuminate tiny particles that are invisible to the naked eye. These particles don't appear when the camera is operating normally during the day. However, under infrared light, they can create a speckled or snowy effect in the image, especially when there's no visible light to contrast with.
6. **Low-Quality Built-In Cameras**
Some manufacturers use substandard internal cameras to reduce costs. To compensate for weak infrared illumination, they artificially increase the CCD’s sensitivity. This leads to excessive gain, which can result in a grainy or snowy image. When viewed through a DVR, these images appear even worse, with noticeable noise and reduced clarity.
In summary, the "whiteout" and glare seen in infrared cameras at night can be caused by a combination of manufacturing flaws, power instability, poor component quality, circuit design issues, environmental factors, and low-quality internal sensors. Addressing these issues requires careful selection of hardware, proper installation, and reliable power management.