Wavelength range of infrared LED beads

Infrared light belongs to the electromagnetic spectrum, sitting just beyond the red band of visible light, which gives rise to its name “Infrared”. This non‑visible radiation spans an extremely broad wavelength band, and it is further categorized into near‑infrared, mid‑infrared and far‑infrared according to practical application scenarios. Beyond the far‑infrared spectrum lies the radio‑wave frequency band. Each infrared segment carries distinct physical properties, determining its suitable industries and end‑use cases.

Limited by current semiconductor manufacturing capabilities, commercially mature infrared LED components are mainly concentrated within the 700 nm‑1600 nm wavelength window. Weishibo Electronics has developed a full‑series infrared LED portfolio that fully covers this practical wavelength range. Our high‑volume, widely‑adopted options include 700 nm, 850 nm, 940 nm, 1050 nm, 1200 nm, 1300 nm and 1450 nm. While wavelengths exceeding 1600 nm theoretically deliver superior penetration performance, extremely low photoelectric conversion efficiency creates major barriers for mass‑market deployment, limiting real‑world practicality.

Classified as Infrared‑A band, near‑infrared marks the transition zone between visible red light and pure invisible infrared radiation. At the 700 nm boundary, faint deep‑red glow can still be detected by human eyes; as wavelength moves toward 1400 nm, the radiation becomes entirely invisible to human vision. Near‑infrared signals are capable of transmitting through glass substrates and generating stable reflection effects.

This is the most dominant working band for modern infrared LED devices. It is extensively implemented in night‑vision monitoring equipment, optical fiber data communication, optical sensing, gesture detection, biometric identification, and remote‑control modules. Thanks to balanced luminous efficiency and signal stability, near‑infrared LEDs remain the preferred solution for most optoelectronic system integrators.

Corresponding to Infrared‑B and partial Infrared‑C regions, mid‑infrared radiation is completely imperceptible to human sight. Energy in this band manifests primarily in the form of thermal radiation. Typical applications cover non‑contact temperature measurement, specialized night‑vision systems, gas monitoring and environmental sensing. Compared with near‑infrared products, mid‑infrared LED chips face stricter production thresholds and are usually deployed for professional industrial‑grade projects.

Covering Infrared‑C and Infrared‑D ranges, far‑infrared energy is dominated by thermal emission. It supports thermal imaging cameras, industrial heating processes, and material characterization workflows. Every substance features its unique infrared absorption fingerprint. When infrared rays pass through a sample, specific wavelengths get selectively absorbed, generating characteristic infrared absorption spectra. This physical principle underpins infrared spectroscopic analysis technology, widely leveraged for material composition identification, ingredient testing and quality inspection across laboratories and manufacturing lines.

In nature, infrared radiation plays an irreplaceable role in multiple physical and biological activities. It participates in thermal energy transfer across the environment and takes part in plant photosynthesis processes.

At Weishibo Electronics, we keep optimizing our infrared LED product matrix to match diversified market requirements. Different target materials and application environments demand carefully‑selected infrared wavelengths: penetration capability, visibility level, heat output and photoelectric conversion efficiency must all be weighed during component selection. Our engineering team provides customers with wavelength consultation and customized LED solutions, supporting security monitoring, smart home hardware, industrial detection, biological sensing and other vertical sectors. Whether you require standard off‑the‑stock wavelengths or tailored optoelectronic components, Weishibo Electronics delivers reliable infrared LED light‑source products for your projects.