Summary
A method is described that allows the spectral sensitivity of photoreceptors to be measured with high spectral resolution. It is shown that the sensitivity of the ocelli ofMusca andCalliphora has a vibrational fine structure in the ultraviolet, strongly indicative of a sensitizing pigment. The visual pigment has its absorption maximum close to 425 nm.
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Kirschfeld, K., Feiler, R. & Vogt, K. Evidence for a sensitizing pigment in the ocellar photoreceptors of the fly (Musca, Calliphora). J. Comp. Physiol. 163, 421–423 (1988). https://doi.org/10.1007/BF00604896
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DOI: https://doi.org/10.1007/BF00604896