Psychology 3680 Course Website 202004/3680/3680.htm Or And follow the links….
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Transcript of Psychology 3680 Course Website 202004/3680/3680.htm Or And follow the links….
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Psychology 3680Course Website
http://www.psych.uleth.ca/Courses/Spring%202004/3680/3680.htm
Or
http://www.psych.uleth.ca
And follow the links….
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Relevant URLs
Byron will send relevant URLs to the course listservefollowing the lectures.
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Natural History of Vision
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Masks for SquintersBartisch 1583
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Ibn Al-Haitham ca.1040.
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Leonardo daVinci ca. 1500
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Des Cartes 1664
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Peripheral Visual System
Structure of the Visual System
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Parts of the eye
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Pinhole Camera
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Camera Obscura
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Diverging• Reflected light goes in all directions• From each point on object• Only very small part passes into camera obscura• At infinity rays are parallel
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Kuppers, 1972, p.25
A Small Pupil
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Kuppers, 1972, p.25
A Large Pupil
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Functions of the Pupil• Lens gathers light• Lens also create problems
– Spherical Aberration– Limited depth of Field
• Iris/Pupil is used to change the trade-off.– Bright -> smaller for better optics– Dim -> optimize for more light gathering
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Spherical Aberration• Different parts of lens converge to different
focal points.
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Spherical Aberration• Reduced by small pupils: clearer vision
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Depth of Field
The smaller the pupil, the larger the range of depths over which objects
will be in focus.
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Pinhole Camera
• Objects at different distances will be in focus. Infinite depth of field.
• Image plane of film is not critical for focus.
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Large Lens • Objects at different distances will be in
focus at different distances behind lens
• Narrow depth of field.