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Fig. 8. Acceptance angle vs pupil absorbance calculated for three visual
pigment conditions, pure rhodopsin (R), one (R+S) and two (R+2S) sensitizing
pigment molecules per rhodopsin, for photoreceptors with distal rhabdomere
diameters 1.4-2.0 µm. For each of the seven pupil states the acceptance
angle as well as the total absorption of a uniformly radiating sky were
calculated. The pupil absorbance was obtained by taking minus the decadic
logarithm of the absorption relative to that for the dark-adapted state
(h=
; the case of Fig.
6).
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