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Visual Optics - Introduction
• In this course, the optical principals behind the workings
of the eye and visual system will be explained.
• Furthermore, descriptions of different devices used to
measure the properties and functioning of the eye will be
described.
• Goals are a general understanding of how the visual
system works and exposure to an array of different
optical instrumentation. What is Vision?
• Three pieces are needed for a visual system
– Eye needs to form an “Image”. Image is loosely defined because it can be
severely degraded and still provide information.
– Image needs to be converted to a neural signal and sent to the brain.
– Brain needs to interpret and process the image.Engineering Analysis
• Optics – Aberrations and raytracing are used to determine the
optical properties of the eye. Note that the eye is non-rotationally
symmetric, so analysis is more complex than systems normally
discussed in lens design. Fourier theory can also be used to
determine retinal image with the point spread function and optical
transfer function.
• Neural – Sampling occurs by the photoreceptors (both spatial and
quantification), noise reduction, edge filtering, color separation and
image compression all occur in this stage.
• Brain – Motion analysis, pattern recognition, object recognition
and other processing occur in the brain.
Physiology of the Eye
Anterior Chamber – front
portion of the eye
Cornea – Clear membrane
on the front of the eye.
Aqueous – water- like fluid
behind cornea.
Iris – colored diaphragm
that acts as the aperture stop
of the eye.
Sclera –white of the eye.
Limbus – boundary
between sclera and cornea. | 
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发表于 2006-8-7 18:06:00
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