Power Area Density in Inverse Spectra

TL;DR

This paper investigates the power area density of inverse spectra across ultraviolet, visible, and infrared ranges, providing experimental evidence for spectral regions like ultra-yellow and infra-cyan, supporting the additivity and inversion properties of inverse spectra.

Contribution

It presents the first measurement of power area density in inverse spectra across multiple spectral ranges, confirming their additive and inversion characteristics beyond visible light.

Findings

Existence of ultra-yellow and infra-cyan regions in inverse spectra

Inverse spectra add up to a constant intensity level

Experimental validation of spectral inversion properties

Abstract

In recent years, inverse spectra were investigated with imaging optics and a quantitative description with radiometric units was suggested (Rang 2015). It could be shown that inverse spectra complement each other additively to a constant intensity level. Since optical intensity in radiometric units is a power area density, it can be expected that energy densities of inverse spectra also fulfill an inversion equation and complement each other. In this contribution we report findings on a measurement of the power area density of inverse spectra for the near ultraviolet, visible and the infrared spectral range. They show the existence of corresponding spectral regions ultra-yellow (UY) and infra-cyan (IC) in the inverted spectrum and thereby present additional experimental evidence for equivalence of inverse spectra beyond the visible range.