The Colors of Light

The entire family of electromagnetic radiation, with all its different wavelengths, is called the electromagnetic spectrum. The electromagnetic spectrum is broken down into named ranges as illustrated below:

The Electromagnetic Spectrum

The visible portion of the electromagnetic spectrum extends from 400 nm to 700 nm. The infrared range includes a broad range of wavelengths that begins just above the longest waves in the visible portion (red) and extends across the wavelength range 700 nm up to 1 millimeter. The part of the range closest to the visible spectrum is called near infrared. The visible + near infrared (VNIR) region is particularly useful for agriculture when used correctly.

Refraction and the Prism

Visible light spans the blue (short-400nm) to red (long-700nm) wavelengths. Like a prism, PIC’s VNIR HSI sensor refracts (or spreads) visible light into its component colors:

Refraction and the Prism

Each unique color contains different intensities of different wavelengths of light. We humans have a limited ability to discern between similar colors. By using our proprietary HSI sensor we can disperse light of any color into its unique spectrum with an ability to discern differences between similar colors far more precisely than the human eye.

Once the spectrum is dispersed we look for similarities and differences in the composition of the light by dividing the spectrum into separate bands.

Color Bands

The PIC VNIR HSI sensor creates 330 separate bands/colors of light. These infinitesimal color bands allow us to analyze subtle differences in the reflected green light from foliage. These subtle color differences will provide precise data illustrating the health of your canopy so you can better manage your crops.

As we fly over your fields and collect the reflected light, the distribution of wavelengths reflected from your fields will be recorded and analyzed to assess the vigor, health and other properties of your crop.

Zone Vigor Map