Fig. 5 | Nature Communications

Fig. 5

From: Rainbow peacock spiders inspire miniature super-iridescent optics

Fig. 5

Simulated reflectance spectra. The simulated reflectance spectra plotted against different viewing angles based on results from Fig. 6g–i. Each spectrum is smoothed, normalized to the highest value of spectra plotted within the panel and assigned to an arbitrary colour. a The foil grating is capable of showing all the colours in a rainbow simultaneously in many different angles, and the rainbow pattern shows up particularly well at angles 12°, 16°, and 33°. b The flat grating can only show a single high purity colour at each viewing angle, and it takes > 20° rotation to shift the colour from one end of the spectrum to the other end (40°, peak wavelength ~ 400 nm → 60°, peak wavelength just below 600 nm). c The prism grating can only show the rainbow pattern at exactly 0°. In all other angles simulated, it cannot show the rainbow pattern like the foil grating (a), nor high purity colours as the flat grating (b) does