Blog

1. **Camera Imaging**

The spectral power distribution ranges from a central wavelength of 830 to 950nm, with a bandwidth of about 40nm. This narrowband distribution falls within the range detectable by regular CCD and CMOS sensors. Consequently, whether it's daytime or nighttime, real-time monitoring is possible. During the day, CCD or CMOS sensors detect both visible and infrared light as objects above absolute zero emit infrared radiation. Based on the principles of light refraction, longer wavelengths have smaller refractive indices while shorter wavelengths have larger ones. When these light rays enter the camera lens, they refract differently, creating distinct images for visible and infrared light on different sensor planes. While visible light creates color images, infrared light produces grayscale images. Proper tuning of visible light images can create virtual images for infrared light, affecting image colors and quality.

2. **Single Filter Plates**

Filter plates are used to regulate light and restore accurate color representation in images while excluding infrared light. However, this means that these cameras can't image in conditions with no visible light, such as during nighttime. To address this, dual-peak single filter plates have been developed and implemented to provide night vision capabilities. While these plates are cost-effective and suitable for both day and night use, they inadvertently allow some infrared light interference during the day due to their broad wavelength range. This interference results in color distortions such as turning green plants grayish, red images appearing faded, and black colors taking on a purple hue (most prominent in outdoor environments with sunlight). At night, the dual-peak glass filtering leads to reduced utilization of all light by the CCD or CMOS, resulting in "snowflake" artifacts and lowered image clarity and low-light performance for infrared cameras.

3. **Dual Filter Plates**

Dual filter plate technology, known as IRCUT in Europe and America, ICR in Taiwan, and Dual Filter Plate Switch in mainland China, allows standard day-night cameras to use different filter plates for day and night operations. This technology effectively addresses the limitations of single filter plates that struggle to balance both day and night scenarios. The IRCUT dual filter plate switch consists of an infrared-cutoff low-pass filter, a full-spectrum optical glass, a mechanical mechanism, and an outer casing. It uses a circuit control board to perform the switching and positioning. During well-lit daytime conditions, the control board positions the infrared-cutoff filter, enabling accurate color reproduction by the CCD or CMOS. When visible light diminishes at night, the infrared-cutoff filter retracts, allowing the full-spectrum optical glass to operate. This configuration detects infrared light from infrared lamps, fully utilizing all available light and greatly enhancing the night vision capability of infrared cameras, resulting in clear and natural images.

The application of IRCUT dual filter plate technology significantly improves performance for both daytime and nighttime scenarios. However, the quality of this technology depends on the filtering properties and structural design. Filter properties, including infrared blocking effectiveness, transparency, and light shaping capabilities, directly influence image clarity and color accuracy. Metal outer casings for the IRCUT dual filter plate switch not only resist high temperatures and deformation but also better distribute heat, mitigating temperature effects on imaging chips and ensuring stable image quality.

In terms of mechanical performance, proper installation is crucial. For instance, when two cameras with good infrared capabilities are aligned, or when a camera with four lights is placed in a small box for testing, images might appear light purple. However, in manual switching mode, the images appear normal. This discrepancy occurs because the camera relies on the photosensitive resistor to sense light intensity, opening the infrared lights first and then switching the IR-CUT. In the scenario of the small box test, the infrared lights are on, but the IR-CUT doesn't switch, so it remains in daytime mode. The reflected light is infrared, which might be weaker, leading to the appearance of a light purple color.

**From the Perspective of the OOSSXX Surveillance Brand:**

At OOSSXX, we understand the intricacies of image quality and color accuracy in surveillance cameras. Our outdoor wireless security camera systems are designed to offer reliable and high-quality monitoring solutions for your property.

Experience the unmatched clarity of our 4K wireless security camera systems, ensuring every detail is captured with precision.

Choose our surveillance system to achieve comprehensive coverage and enhanced security for your surroundings.

Benefit from our outside security camera system that seamlessly blends into your environment while delivering exceptional performance.

Opt for a security camera with a hard drive to store your footage securely and conveniently.

Discover the power of our NVR cameras, designed to provide seamless integration and reliable monitoring.

Experience the effectiveness of our home security camera system in safeguarding your residence and loved ones.

Explore the capabilities of our camera systems to tailor your surveillance setup to your specific needs.

At OOSSXX, we're dedicated to delivering advanced surveillance solutions that ensure color accuracy, image clarity, and superior performance for your security needs.