Polarization-sensitive photoreceptors of different spectral types in the compound eye of waterstriders

Bartsch, Kaja

doi:10.1007/bf01134528

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…High PS values have been measured in the specialized dorsal rim area of the compound eye of several insects: PS≈10 in honeybees A. mellifera (Labhart, 1980) and in crickets G. campestris (Blum and Labhart, 2000). Apart from the dorsal rim area, high PS values (mean PS=7) were found in the lateral retina of waterstriders (Gerris lacustris; Bartsch, 1995). Fig.…”

Section: Figurementioning

confidence: 97%

Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina ofPapiliobutterflies

Horváth

Gál

Labhart

et al. 2002

Journal of Experimental Biology

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SUMMARYUsing imaging polarimetry, we have measured some typical reflection-polarization patterns of plant surfaces (leaves and flowers) under different illuminations. Using a quantitative model to determine photon absorptions in the weakly polarization-sensitive (PS≈2)photoreceptors of Papilio butterflies, we have calculated the influence of reflection polarization on the colours of leaves and flowers perceived by Papilio. Compared with a retina containing polarization-blind colour receptors, the colour loci of specularly reflecting and, thus, strongly polarizing areas on a plant are slightly shifted, which could cause the perception of false colours. However, the colour of specularly reflecting surfaces is strongly masked by white glare, which may prevent the perception of polarization-induced hue shifts. Although the perception of polarizational false colours by Papilio butterflies was previously demonstrated with artificial, strongly colour-saturated and totally linearly polarized stimuli, we expect that the weak polarization sensitivity of Papilio photoreceptors hardly influences colour perception under natural conditions.

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Section: Figurementioning

confidence: 97%

Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina ofPapiliobutterflies

Horváth

Gál

Labhart

et al. 2002

Journal of Experimental Biology

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“…Bees use the polarization of scattered sunlight as a compass [1], [2]. Waterstriders, backswimmers, and dragonflies use the polarization of reflected light to detect water and also under-water predators [3]- [7]. Both invertebrates (e.g.…”

Section: Introductionmentioning

confidence: 99%

Polarization imaging: principles and integrated polarimeters

Andreou

Kalayjian²

2002

IEEE Sensors J.

198

102

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Polarization is a general descriptor of light and contains information about reflecting objects that traditional intensity-based sensors ignore. Difficult computer vision tasks such as image segmentation and object orientation are made tractable with polarization vision techniques. Specularities, occluding contours, and material properties can be readily extracted if the Stokes polarization parameters are available. Astrophysicists employ polarization information to measure the spatial distribution of magnetic fields on the surface of the sun. In the medical field, analysis of the polarization allows the diagnose of disease in the eyes. The retinae of most insect and certain vertebrate species are sensitive to polarization in their environment, but humans are blind to this property of light. Biologists use polarimeters to investigate behaviors of animals-vis-à-vis polarization-in their natural habitats. In this paper, we first present the basics of polarization sensing and then discuss integrated polarization imaging sensors developed in our laboratory.

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Discriminative responses of squid (Loligo pealeii) photoreceptors to polarized light

Saidel¹,

Shashar²,

Schmolesky³

et al. 2005

Comparative Biochemistry and Physiology Part A: Molecular &

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Polarization-sensitive photoreceptors of different spectral types in the compound eye of waterstriders

Cited by 4 publications

References 9 publications

Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina ofPapiliobutterflies

Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina ofPapiliobutterflies

Polarization imaging: principles and integrated polarimeters

Discriminative responses of squid (Loligo pealeii) photoreceptors to polarized light

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