Infrared Wavelength
Infrared Wavelength refers to electromagnetic waves with wavelengths ranging from 700nm to 1mm (1,000,000nm), which are part of the invisible spectrum. Infrared light is classified into Near-Infrared (NIR), Mid-Infrared (MIR), and Far-Infrared (FIR) based on wavelength. The near-infrared range (700nm - 1400nm) is commonly used in night vision devices, infrared LED lighting, and Body cameras.
Common Infrared LED Wavelengths in Body Cameras
Infrared LEDs are widely used for night vision and other optical applications. The most common infrared wavelengths include:
- 850nm: Frequently used in night vision cameras and surveillance systems, offering a balance between visibility and performance.
- 940nm: Commonly used in covert applications to reduce visible red light emission from the LED.
Role of Infrared Wavelength in Night Vision
Infrared LEDs (IR LEDs) serve as the primary light source for night vision devices, including body cameras. The wavelength determines the night vision range, stealth capability, and imaging quality.
| Infrared Wavelength | Characteristics | Applications |
|---|---|---|
| 850nm | High visibility, clear night vision, emits faint red light visible to the human eye | Surveillance cameras, body cameras, night vision devices |
| 940nm | Completely invisible, enhanced stealth, but slightly weaker night vision performance | Covert cameras, military night vision, infrared sensors |
Impact of Wavelength on Night Vision Distance
- Shorter wavelengths (850nm) have stronger penetration, making them suitable for long-distance night vision, but the faint red glow may be visible in complete darkness.
- Longer wavelengths (940nm) are more concealed and difficult to detect, but infrared sensors have lower sensitivity, resulting in a shorter night vision range.