What is Aberration: Definition and 60 Discussions

In optics, aberration is a property of optical systems, such as lenses, that causes light to be spread out over some region of space rather than focused to a point. Aberrations cause the image formed by a lens to be blurred or distorted, with the nature of the distortion depending on the type of aberration. Aberration can be defined as a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements.An image-forming optical system with aberration will produce an image which is not sharp. Makers of optical instruments need to correct optical systems to compensate for aberration.
Aberration can be analyzed with the techniques of geometrical optics. The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays.

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  1. RafaPhysics

    Aberration and Doppler shift in Special Relativity

    A large disk rotates at uniform angular speed ##\Omega## in an inertial frame ##S##. Two observers, ##O_1## and ##O_2##, ride on the disk at radial distances ##r_1## and ##r_2##, respectively, from the center (not necessarily on the same radial line). They carry clocks, ##C_1## and ##C_2##...
  2. skaiser

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    I am using 2 lenses in a 4f configuration. The input is a large collimated beam (632nm). After passage through the 2 lenses the beams vertical dimension remains constant, however, the horizontal dimension get smaller, as if it is being focused only in the horizontal direction. Does anyone have...
  3. VVS2000

    A Spherical aberration in Biconvex lens

    I was recently looking for proven relations between focal length, radius of curvature, refractive index etc of a convex lens as I was working on an experiment, I did Find a relation, between Height from principal axis and focal length, and it was a huge relation!I did the experiment to verify...
  4. VVS2000

    I Aberration in Lenses: Formula & Relation Explained

    Is there any formula or a mathematical relation to find aberration in lenses? I read recently that plano concave lens has a negative aberration and plano convex lens is used to correct it. I am not sure what those statements mean. Is there some type of relation that explains these statements or...
  5. VVS2000

    I Spherical aberration in Biconvex and Plano Convex lenses

    I wanted to know about spherical aberration in a biconvex and plano convex lens as I was planning an experiment with them. I was reading about them and came upon the following passage. I don't know whether the given equation is an empirical one or a derived equation. Can anyone help me if you...
  6. Kairos

    I Classical Aberration Formula: Understanding & Application

    I believe I have understood the formula of aberration of light ##\tan \theta' = \dfrac{\sin \theta}{\beta + \cos \theta} \sqrt{1-\beta^{2}} ## but I wonder if the non-relativistic formula ## \tan \theta' = \dfrac{\sin \theta}{\beta + \cos \theta} ## has a physical relevance. Does this...
  7. C

    I Did Einstein Formulate an Aberration of Light Using Tangents?

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  8. Phylosopher

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  9. W

    I Glasses and problems with chromatic aberration

    Hello, i wear glasses (i have 2 pairs) ones are 1.60 esseilor (-4.50 and -4.75) cylinder 0,25 both and new ones that i got yesterday Trivex perfalit 1.53 (-5.00 and -4.75) cylinder 0,25 both.(+ antireflex both) And the problem with first ones was from center i see ok but when i look at the...
  10. M

    Effects of Lens Element Aberrations on a Fully Corrected Lens Image

    Leitz Summicron 50 is one of the extremelly well corrected lens in the world. Legend says about this lenses internal elements and their spherical aberrations was responsible of lot of beatiful effects on image. For highly corrected lens image , does high internal aberration really effects the...
  11. Gene Naden

    I How stellar aberration was quantified in the early days

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  12. Nabin kalauni

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  13. Clear Mind

    Stargazing Does a Radio Telescope Have Aberration and How Does it Affect Its Performance?

    I was studyng my exam of astrophysics laboratory, while treathing the optical aberration I've wondered: does radio telescope have aberration? Is a paraboloid antenna in a single dish affected by coma? and the radio telescope made by arrays of resonant structures? Maybe those are silly...
  14. H

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  15. T

    I Relativistic Aberration Formula & Lorentz Transformation

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  16. D

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    In 1727, astronomer J. Bradley discovered the phenomenon of stellar aberration. All stars throughout the year on the celestial sphere pass ellipses with an semimajor axis observed from the Earth at an angle of 20.5. Aberration is caused by the movement of the Earth in its orbit around the sun at...
  17. J

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  18. K

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  19. L

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  20. mishima

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  21. B

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  22. P

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  23. K

    Length Contraction & Relativistic Aberration: Is 1 Formula Enough?

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  24. jk1956

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  25. H

    Transformation equation of velocity contradicts stellar aberration?

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  26. N

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  27. P

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  28. Q

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  29. E

    I'm sorry, I'm not sure what your question is. Could you please clarify?

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  30. E

    How is it possible for binary stars to not show changes in aberration angles?

    I thought I understood how stellar aberration conformed to Special Relativity. The CHANGE in that angle comes from the CHANGE in our orbital velocity direction about the sun over six months. And it is the same for all stars. That is fine if there are no significant changes in a star’s state of...
  31. B

    Aberration of Light: Understanding Transformation Equations for Coordinates

    Homework Statement http://s22.postimg.org/5vp0p2aox/Untitled.png Homework Equations The Attempt at a Solution Here is the solution I understand everything that must be done after one find the correct transformations for the two coordinates, but I don't understand why the...
  32. U

    Relativity aberration of light

    Hi everybody, I really need help and it's quite an emergency.. I have this problem to do but I'm really stuck I don't know where I have to begin and I don't even understand what they're asking for: A star in the sky is observed from Earth to describe an elliptical path whose minor axis subtends...
  33. C

    Spherical Aberration Explained - Chris' Experiments

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  34. bcrowell

    James Bradley's Observation of Aberration: Precedent to Michelson-Morley?

    I'm reading Eisenstaedt, The curious history of relativity: how Einstein's theory of gravity was lost and found again. In ch. 1, Eisenstaedt says that in the early 18th century, James Bradley at Oxford tried to observe parallax, failed, but detected a much larger effect, aberration, which showed...
  35. C

    Can Humans Detect Spherical Aberration?

    Q: Consider your own eyesight. Can you detect any indication of spherical aberration? If so, describe what you see. A: I understand spherical aberration is generated by spherical lenses or mirrors and causes light to spread, which results in a blurry image. My initial thought was yes, a...
  36. F

    Spherical Aberration of Lens

    Homework Statement Hi, I have a question regarding my physics lab assignment. Last week I performed an experiment on the focal length of a biconcave lens using different part (using the radius of the lens) of the lens. This is done by completely covering the lens with a cardboard except for...
  37. K

    Measurement of c using Bradley and 1905 SRT aberration models

    At another thread under Special and General Relativity the following question was asked: "Why isn't stellar aberration considered to be a one way measurement of c? If the angle of aberration (θ-θ0) is -20.5 arc seconds and the Earth's orbital speed is 29.79 Kilometers/second normal to the...
  38. K

    Relativistic aberration and locally measured electric flux density

    Does relativistic aberration apply to electric fields and magnetic fields? If a spaceship accelerated to a relativistic speed with respect to an initial inertial frame, in a constant direction with respect to a uniform electric field, do the effects of aberration affect the magnitude of electric...
  39. Q

    Aberration of light in classical and relatvistical cases

    i need someone to explain me the aberration of light , i tried to read i from my book its a bit more complicated than i thought i mean when we move the microcope we make a tilt what do you mean by that? all in all i didnt understand this concept and i need a really clear explanation especially...
  40. W

    Why does a spherical lens/mirror have spherical aberration.

    I know that a spherical lens does indeed have spherical aberration, and I know that this is caused by the marginal and axel rays of light converging at different points. My question is why? What is it about the lens that makes the rays incedent on the edges of the lens focus at a closer point...
  41. O

    Spherical aberration in high NA objectives

    hi everybody, i would appreciate it if someone could clarify the concept of spherical aberrations in the context of high NA objectives in which use lenses are used that are not exclusively of the spherical type. a common thing that you hear is that some objective is corrected for 0.17mm...
  42. K

    Understanding Stellar Aberration and Its Relationship to Transverse Velocity

    Is this transverse velocity one that exists at right angles to the space-time geodesic on which that light travels?
  43. R

    F-Number & Spherical Aberration: Uncovering the Relationship

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  44. H

    Aberration of starlight due to

    Aberration of starlight due to... I have read that the 20+ arcsec annual aberration of starlight is explained by special relativity, but I found no further comment. So how is it explained in SR? -HarryWertm
  45. J

    Can Chromatic Aberration arise from Gravitational Lensing?

    I've been puzzled by this. If light of different frequencies (like ultra violet to infra-red) would experience different refraction angles in the presence of a powerful gravity field. I understand that light has zero rest mass but has effective mass given the fact it's in motion. What I'm...
  46. Z

    Q. about Bradley's Stellar Aberration

    I have been reading in my book on Special Relativity (A. P. French, Chapman & Hall) that stellar abberation as discovered by Bradley, only made sense to physicists at the time in the context of a wave/ether model of the propagation of light IF the Earth moved with respect to the ether. I don't...
  47. R

    Off-axis Explained: What it is & How it Contributes to Comatic Aberration

    As I was studying Comatic aberration, in the definition of coma the word off-axis is used which I couldnot understand. What does off axis means? and how does it contribute to the comatic aberration? I also want to know about off axis diagrammatically.Thanks......
  48. F

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    Homework Statement - single lens - f=50cm - refractive index n=1.53 - if object placed 70cm, find the radii of curvature for the two surfaces of the lens which would minimise spehrical aberrationHomework Equations what i got from my notes refraction at a spherical surface...
  49. H

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    I'm trying to construct a lens model, and having trouble because I want to portray a perfect lens rather than one with spherical aberration. It's proved impossible to find via Google, although I did find an earlier thread on this forum that was helpful. From what I can gather, the lens needs...
  50. S

    Galilean beam expander and spherical aberration

    Sorry for posting this post in two different place, I could not decide where is the best place to post it. I am trying to build a Galilean beam expander/contraction using a plano-convex and plano-convace lenses. My question is how should I arrange them to reduce the spherical aberration...
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