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Alternatives to superposition images in clear-zone compound eyes

Horridge, George Adrian

Description

The clear zone between the cones and the receptor layer in dark -adapted eyes of insects that are active in dim light has formerly been explained as a space to allow formation of a superposition image. Although erect images have been seen in Ephestia (Lepidoptera) and Hydrophilus (Coleoptera), new experiments show that they are accompanied by scattered light and that the angular sensitivity of individual receptors must be wide in the dark-adapted state. Alternatives to the superposition theory...[Show more]

dc.contributor.authorHorridge, George Adrian
dc.date.accessioned2019-08-14T04:10:30Z
dc.identifier.issn0962-8452
dc.identifier.urihttp://hdl.handle.net/1885/165044
dc.description.abstractThe clear zone between the cones and the receptor layer in dark -adapted eyes of insects that are active in dim light has formerly been explained as a space to allow formation of a superposition image. Although erect images have been seen in Ephestia (Lepidoptera) and Hydrophilus (Coleoptera), new experiments show that they are accompanied by scattered light and that the angular sensitivity of individual receptors must be wide in the dark-adapted state. Alternatives to the superposition theory are examined, and it is concluded that in eyes with crystalline cones the clear zone (in general, in the numerous shapes and sizes of eyes of nocturnally active insects) enables light entering by many facets to sum upon individual receptors on the far side of the clear zone. In addition to the scattered light effect, light is carried across the clear zone in crystalline tracts or retinula cell columns, which provide a separate optical pathway for each ommatidium also in the light-adapted state.
dc.format.extent32 pages
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherRoyal Society
dc.rights© Royal Society
dc.sourceProceedings of the Royal Society of London. Series B, Biological Sciences
dc.subjectinsects
dc.subjectclear zone
dc.subjectcrystalline cones
dc.subjecteyes
dc.subjectscattered light effect
dc.subjectcrystalline tracts
dc.subjectretinula cell columns
dc.titleAlternatives to superposition images in clear-zone compound eyes
dc.typeJournal article
local.identifier.citationvolume179
dc.date.issued1971-11-16
local.publisher.urlhttps://royalsociety.org/
local.type.statusPublished Version
local.contributor.affiliationHorridge, George Adrian, Division of Biomedical Science and Biochemistry, CoS Research School of Biology, The Australian National University
local.description.embargo2037-12-31
local.identifier.essn1471-2954
local.bibliographicCitation.issue1055
local.bibliographicCitation.startpage97
local.bibliographicCitation.lastpage124
local.identifier.doi10.1098/rspb.1971.0084
CollectionsANU Research Publications

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