OPTOMOTORY INVESTIGATION OF THE VISUAL-SYSTEM OF SOME EYE MUTATIONS OF THE DROSOPHILA FRUIT-FLY
OPTOMOTORY INVESTIGATION OF THE VISUAL-SYSTEM OF SOME EYE MUTATIONS OF THE DROSOPHILA FRUIT-FLY
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DOI：
10.1007/bf00288561
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发表时间：
1964-01-01
期刊：
影响因子：
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通讯作者：
GOTZ, KG
中科院分区：
文献类型：
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作者：
GOTZ, KG
利用果蝇正常和突变眼色素的视动反应，分析了果蝇复眼的光学特性。刺激由具有不同周期强度分布的圆柱形图案以不同速度旋转提供。该响应由绕垂直轴的扭矩组成，并在固定飞行条件下记录。（最大反应约为0.04达因·厘米）。光学系统的传递特性由影响分辨率的小眼内角Δ θ和影响高空间频率响应的单个小眼视场宽度Δρ决定。从果蝇的刺激-反应实验中获得Δ ρ = 4.6和Δρ= 3.5。它们与屏蔽颜料的存在无关。具有强（+，se）、弱（w a）和缺失（w）色素沉着的果蝇的反应差异可以通过色素缺乏眼中散射光的增加来解释。在同等照明的受体中，总强度预计分别为1∶ 1∶ 8∶ 25。运动的感知仅取决于时间，而不是相邻小眼的周期性强度变化之间的空间相位关系。因此，小眼间角Δ θ的不均匀分布改变了眼睛不同部分的分辨能力，而不改变对运动的响应。在果蝇的感知系统中，眼睛不同部位同时受到的相同强度的不同刺激，根据这些部位的小眼数量进行平均。
The optical properties of the compound eye of Drosophila have been analysed using the optomotor reactions of flies with normal and mutant eye pigmentation. The stimulus was provided by cylindrical patterns with different periodic intensity distributions rotating at different speeds. The response consists of a torque about the vertical axis and was recorded under conditions of fixed flight.(Maximum reaction is about 0.04 dyn· cm). The transfer characteristics of the optical system are determined by the inter-ommatidial angle Δϕ, influencing the resolving power and by the width of the visual field of single ommatidia Δρ, influencing the response at high spatial frequencies. The values Δϕ= 4.6 and Δρ= 3.5 are obtained from stimulus-response experiments with Drosophila. They are independent of the presence of screening pigments. Differences in the response of flies with strong (+, se), weak (w a), and missing (w) pigmentation can be explained by the increased amount of scattered light in the pigment-deficient eyes. The overall intensities in the equally illuminated receptors are expected to be in the ratio 1∶ 1∶ 8∶ 25, respectively. The perception of motion depends only on the temporal, not on the spatial phase relations between periodic intensity variations in neighbouring ommatidia. Therefore the inhomogeneous distribution of the inter-ommatidial angle Δϕ changes the resolving power in different parts of the eye without changing the response to motion. Different simultaneous stimuli of equal strength in different parts of the eye are averaged in the perceptive system of Drosophila according to the number of ommatidia in these parts.