scholarly journals Non-linear projection of the retinal image in a wide-angle schematic eye.

1974 ◽  
Vol 58 (8) ◽  
pp. 709-714 ◽  
Author(s):  
N Drasdo ◽  
C W Fowler
Keyword(s):  
Retinal Image ◽  
Wide Angle ◽  
Linear Projection ◽  
Non Linear ◽  
Schematic Eye

Bringing Chaos to Order: Historical Memory and the Manipulation of History

2008 ◽  
Vol 15 (3-4) ◽  
pp. 280-303 ◽  
Author(s):  
Richard Ascough
Keyword(s):  
Historical Memory ◽  
Modern Science ◽  
Scientific Models ◽  
Social Scientists ◽  
Linear Projection ◽  
Classical Studies ◽  
Non Linear ◽  
Historical Investigation ◽  
Roman Antiquity

AbstractIn modern approaches to biblical and classical studies enlightenment scientific models have dominated historical investigation. As such, the notion of memories and traditions, even when they are assumed to be invented, are presented as reflecting a linear projection of history, with singular causes of change. Modern science, however, has moved beyond the Newtonian view of mechanics that undergirds such a view and is working with models of chaos and complexity. Social scientists and humanists are lagging behind and are only now beginning to understand the implications for their disciplines. This paper adds another voice to the small but growing cadre of promoters of a non-linear notion of historiography by noting its implications for a project of redescribing Graeco-Roman antiquity.

On the use of schematic eye models to estimate retinal image quality

2000 ◽  
Vol 5 (3) ◽  
pp. 307 ◽  
Author(s):  
G. Li ◽  
H. Zwick ◽  
B. Stuck ◽  
D. J. Lund
Keyword(s):  
Image Quality ◽  
Retinal Image ◽  
Schematic Eye

Non-Linear Projection to Latent Structures

1996 ◽  
Vol 29 (1) ◽  
pp. 6055-6060
Author(s):  
D.L. Xu ◽  
A.J. Morris ◽  
K.B. Martin
Keyword(s):  
Linear Projection ◽  
Projection To Latent Structures ◽  
Non Linear ◽  
Latent Structures

scholarly journals Scaling the Retinal Image of the Wide-Angle Eye Using the Nodal Point

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 284
Author(s):  
Michael Simpson
Keyword(s):  
Linear Relationship ◽  
Retinal Image ◽  
Nodal Point ◽  
Axial Distance ◽  
Actual Behavior ◽  
Wide Angle ◽  
Angular Range ◽  
Exit Pupil

Angles subtended at the second nodal point of the eye (NP2) are approximately the same as input visual angles over a very large angular range, despite the nodal point being a paraxial lens property. Raytracing using an average pseudophakic eye showed that the angular nodal point criterion was only valid up to about 10°, and that the linear relationship was due instead to the cornea and lens initially creating chief ray angles at the exit pupil that are about 0.83 times input values for this particular eye, and then by the retina curving around to meet the rays in a manner that compensates for increasing angle. This linear relationship is then also maintained when retinal intersections are calculated relative to other axial points, with angles rescaled approximately using the equation R/(R + delta), where delta is the axial distance from the center of a spherical retina of radius R. Angles at NP2 approximately match the input angles, but the terminology is misleading because this is not a paraxial property of the eye. Chief rays are used with finite raytracing to determine the actual behavior.

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