Martin Flashcards
What are the lower order aberrations
Defocus and astigmatism
What are the main high order aberrations
Spherical, coma and trefoil
Which wavelengths are more refracted, shorter or longer
Shorter
What quantifies the amount of dispersion produced by an optical element
Dispersive power
As the dispersive power increased, ,the dispersion of the optical element _____
Increases
Each optical element is selected based on 2 important factors
Refractive index and abbe number
As the abbe number increases, dispersion ____
Decreases
The separation of white light into its component elements by an optical element is
Chromatic dispersion
Dispersion of water varies how much across visual spectrum
1%
Distance between image planes
LCA
Variation of power with wavelength
Chromatic difference of power
If measuring image space on the retina
Chromatic difference of power
If measuring object space
Chromatic difference of refraction
The vergences of source for which the source is focused at the retina for a range of wavelengths (different object distances)
Chromatic difference of refraction
Variateion of position of image on retina
TCA
TCA may be specified by the ____ between refracted rays for different wavelengths
Angle
The variation of position with wavelength
Chromatic difference of position
Variation of magnification with wavelength
Chromatic difference of magnification
Which to “chromatic difference of ___” go with LCA
Power and refraction
Which 2 “chromatic diff of ___” go with TCA
Position and magnification
LCA range is about
2.1 D
Does the LCA of our eye change over our life? Why?
No; bc the chromatic aberration is determined by dispersion of media (not refractive index)
Mean magnitude of foveal TCA
.82 arcmin of visual angle
Lower wavelength makes the eye more _____
Myopic
Higher wavelength makes the eye more _____
Hyperopic
The magnitude of the affect of magnification depends on
Axial distance (z)
Chromatic difference of position (TCA) induces _____ which affect image contrast
Phase shift
A point object emitting 2 wavelength of light will produce a double retinal image which gives rise to the perception of a double object
Chromatic Diplopia
A stereoscopic illusion in which different colored objects located at same viewing distance appear the lie at different distances
Chromostereopsis
What color appears closer f
Red
An effect of TCA combined with bino vision
Chromostereopsis
Which appears closer if pupils are displaced temporally
Red
Which appears closer if pupils are displaced nasally
Blue
