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I have been a professional in this area for over 30 years, and would be happy to take this on if there is no-one else willing. As I have only just joined Wikipedia, I will need some time to get used to it. My first reaction from looking at the current article is that it does need comprehensive rewriting although parts of it can be reused. LarryJayCee 22:54, 25 February 2007 (UTC)
This page is almost completely lifted from Project Gutenberg. Because Gutenberg is public domain, this is not a copyright problem, but the original text dates to 1911, without changes. An expert is needed to check the current accuracy of the article.
Catfood73 13:53, 22 January 2007 (UTC)
This is good stuff, but needs cleaning up.
Does anyvone have the images that belong to this article?
I've added the scans from the original article. Not good quality, but if and when someone re-writes this, they should come in useful. -- DrBob 21:21, 15 Mar 2004 (UTC)
There are already specific articles on some types of aberations, such as Coma and Spherical. Maybe this should be more of a summary, and the info used to supplement/enhance their repsective articles. Tenfour 20:51, 15 February 2006 (UTC)
This page, at first glance, is a bit much. It really has a great deal of content, but it is so heavy that it is nearly unreadable.RSido 04:41, 2 January 2007 (UTC)
I have never seen the word Pencils used in the context that is is on this page. Sometimes i think that it means angles and sometimes i have no idea what it is referring to. Is this how the original (Gutenburg) article is written or is this a vandalism of sorts? -- Straha_206th 18:19, 9 February 2007 (UTC)
The result of the proposal was move. Duja► 08:32, 23 October 2007 (UTC)
Aberration in optical systems → Optical aberration — This would be a simpler, clearer title, and would reduce the need to pipe links to this article. Another posibility might be Aberration (optics). —Srleffler 16:42, 18 October 2007 (UTC)
*'''Support'''
or *'''Oppose'''
, then sign your comment with ~~~~
. Since polling is not a substitute for discussion, please explain your reasons, taking into account Wikipedia's naming conventions.The drawing 386px-ABERR4.svg is not correct. The radial distortion inreases or decreases with the the distance to the centre of distortion. If it decreases the result is a barrel. So the distorted barrel have to be smaller than the object. Someone with the privileges could change it. --Msoon1509 (talk) 12:14, 17 May 2009 (UTC)
The article discusses fitting a wavefront with a Zernike polynomial. This sort of makes sense, but I'm not clear on how the wavefront would be described. Ideally, a wavefront converging on the image surface would be spherical so that it comes to a point on the image surface. Is the idea that you compute that nearly-spherical wavefront in spherical coordinates? That is, do you look at the chief ray 1mm away from the image and then normalize the rest of the wavefront with ρ in [0,1] representing the angles from the center to the edge of the exit pupil as seen from the image point, so then you ideally would have
(a section of a perfect sphere) and so the aberration is the error,
Is that basically right, or is it something else? I ask because my understanding is that the DC Zernike term corresponds to Piston (optics) and that page does an awful job explaining. If what I describe is correct, then the DC Zernike term is just defocus, no? —Ben FrantzDale (talk) 12:30, 30 May 2012 (UTC)
The problems begin right at the start and are not just technical.
"An optical aberration is a departure of the performance of an optical system from the predictions of paraxial optics.[1] In an imaging system".
To my mind, this is a muddled and inadequate definition. For example, camera lenses designed using optical models much more sophisticated than paraxial optics still exhibit aberrations (departures from ideal performance).
As another, hardly technical, mistake, the author seems to think that the retina of the human eye is a plane surface. A medic will correct me if I'm wrong, but I think that this is horse feathers!
I'm not sure that the article belongs under medical stuff either. Lens aberration is a general topic of interest to those in various fields and is certainly not limited to optical lenses. Much of the analysis applies to radio frequency (RF), particularly microwave, lenses in radio astronomy.
NetherWyndham (talk) 07:24, 17 October 2015 (UTC)
Almost the entire article, except for three or four added paragraphs, is an exact copy of the entry in the Encyclopædia Britannica Eleventh Edition. I was going to add footnotes to each EB1911 paragraph, but that seems excessive (it came out to about 35 footnotes). If this article ever gets more of a rewrite, and needs some specific footnotes for the surviving EB1911 material, it can be compared with s:1911 Encyclopædia Britannica/Aberration, using Earwig's copyvio detector for example. David Brooks (talk) 19:57, 3 May 2016 (UTC)
As explained, this article was adapted from an old article with no copyright problem. I am not an expert in this subject. I just have a general knowledge from what I have read in photography books. There is an old offer from an expert, I ignore what inhibited him for rewriting the article. I hope that he had not been disappointed by the stupid robots that blindly revert changes based on a weak criterium which considers everything vandalism. Nor by those kids which spend too much time editing earning the rights to control Wikipedia, but lacking experience want to blindly apply rigid rules based on what they subjectively believe is the correct thing. That is the reason that inhibited me to write in subjects that I know.
For those enthusiasts who want to improve this entry, I suggest to propose a new structure.
From my limited point of view, I think that a good start is to explain an ideal optical model, which anyone that learned Analytical Geometry in school, can understand. Then introduce the limitations to build the lenses that we know, explaining what aberrations are caused from the elements available to build lenses. How those aberrations are solved, for example by composing lenses in groups, adding anti-reflexive coatings, etc. Then moving to the optics of other spectrum of the electromagnetic space, like that in radio-astronomy, radars, medical imaging equipment, different kinds of microscopes, etc.
In synthesis, first giving a general overview of optics with parabolas, spheres modelling elements like mirrors and glasses, then explaining why those models are difficult to implement in real lenses. And after explaining with objects which are familiar to almost everyone like, mirrors, eyeglasses, magnifying glasses, Fresnel screens, camera lenses, microscopes, telescopes, etc. Going to radio-telescopes, electron microscopes, radars, medical imaging systems like ultrasound, tomographies, etc. — Preceding unsigned comment added by 201.124.237.242 (talk) 00:22, 24 December 2019 (UTC)
Chromatic is the splitting of white light into its respective colours/wavelengths. Monochromatic Aberration is the splitting of pencils of light depending on the shape, curvature, density, position and size of the lens. Chromatic Aberration as an inherent effect of light moving through a medium of one refractive index to another, cannot be solved but can be reduced by using lenses with a high Abbe value. The highest still used in spectacles is Crown Glass (n=1.523, abbe=59). Sometimes chromatic aberration is desirable, such as in diamonds (abbe=2.4), in which the splitting of light combined with a multifaceted surface, produce a multispectral 'sparkle'. Within telescopes and spectacles, this is undesirable though as the viewer would see colour fringing when viewing high contrast images such as a tree against a bright sky. On Monochromatic aberration: There are 5 types. Coma, Spherical, Distortion(Barrel and Pincushion), Petzval Field Curvature and Astigmatism.(You have articles for some of these). I would then briefly touch on causes of each of these and their current solutions or perhaps link to their own articles.
I would also suggest this article on 'Optical Aberration' is therefore divided into 'Monochromatic Aberration' and 'Chromatic Aberration' with this article only serving to briefly summarise 'Optical Aberration' before diverting people on.213.18.178.122 (talk) 14:12, 31 August 2020 (UTC) Mike (info@optics.works)