Table of Contents

1. Introduction
2. Mechanism of Dual-spectrum cameras
3. Performance Parameters
4. Savgood Company Solutions
5. References

Introduction

Dual-spectrum cameras are innovative imaging devices that combine two different spectrum modalities—typically visible light and infrared (IR)—to provide enhanced imaging capabilities in various conditions. This technology is increasingly utilized in fields such as security, surveillance, firefighting, and wildlife observation.

Mechanism of Dual-Spectrum Cameras

A dual-spectrum camera integrates two distinct types of sensors: a standard CMOS or CCD sensor for visible light and a thermal sensor for infrared radiation. The data from these sensors is processed to deliver images that provide comprehensive insights into both the visible and thermal properties of the scene.

Visible light sensors operate in the range of 390 to 700 nanometers, capturing the spectrum perceivable by the human eye. Infrared sensors, on the other hand, detect radiation typically in the range from 8,000 to 14,000 nanometers, beyond the visible spectrum, enabling the detection of heat emissions from objects.

Performance Parameters

The performance of a dual-spectrum camera is determined by several key parameters:

• Resolution: Visible light sensors generally have higher resolutions, often exceeding 4K (3840 x 2160 pixels). Infrared sensors typically have lower resolutions, such as 640 x 480 pixels, due to the complexity and cost of thermal detection technology.
• Sensitivity: Thermal sensitivity is measured in milliKelvins (mK). A camera with a sensitivity of less than 50 mK can discern minor temperature differences.
• Frame Rate: Standard frame rates are around 30 frames per second (fps) for visible images, but may be lower for thermal images due to sensor limitations.
• Field of View (FoV): Dual-spectrum cameras often feature different FoVs for each spectrum, requiring calibration to integrate both images seamlessly.
• Wavelength Ranges: Adjustments in the infrared spectrum range can be made to target specific applications—mid-wave IR from 3,000 to 5,000 nanometers or long-wave IR from 8,000 to 14,000 nanometers.

Savgood Company Solutions

Savgood, a leader in imaging technology, offers a range of dual-spectrum cameras. Their offerings focus on high performance and precision:

• SG-ZCM2030NX - This model combines a 2-megapixel visible light sensor with a 640 x 512 thermal sensor, featuring advanced image processing techniques to produce clear and detailed imagery in challenging conditions.
• SG-ZCM4050N - It is a higher-resolution product with a 4K visible sensor paired with a 384 x 288 thermal sensor, offering excellent thermal sensitivity and an intuitive interface for easy operation.
• SG-TGC4350 - This camera emphasizes extended thermal wavelength detection, supporting a broad array of applications from industrial inspection to perimeter security.

References

• Anderson, J. (2021). Dual-Spectrum Imaging: Techniques and Applications. Imaging Science Publishing.
• Smith, R. & Jones, E. (2022). Advancements in Thermal Imaging Camera Design, Journal of Optical Engineering, 61(3), 301-315.
• Savgood Official Website. (2023). Product Specifications and Technical Resources. Retrieved from: www.savgood.com