University of South Florida Aberration Correction Discussion

Question Description

In our brief study of optics we used several approximations to make our calculations easier. However, as we know physics often makes assumptions (at this level) that do not exactly hold up well in reality. In experimental optics many of these problems are evident when trying to focus an image. Many of these issues are called optical aberrations. In fact some of you may be familiar with them if you have astigmatism as our eye acts in many ways a thin lens. In this discussion post, you will read about the different types of optical aberrations, the effects that they have on images, and some ways that they can be corrected.

This discussion post will be worth 2 points to your final grade. Correspondingly, it should be twice as long as the previous discussion post.

Your post should be a minimum of 200 words. These posts should be thoughtful (using excessive 'fluff' words, writing off-topic, etc. will lead to an incomplete score). It is not necessary to derive any equations or do any calculations. I am only looking for a practical, theoretical understanding. These posts will be graded as either complete or incomplete. A 'complete' grade will result in one additional point being added to your final grade in the course. (Links to an external site.) (Links to an external site.) (Links to an external site.) (Links to an external site.) (Links to an external site.)

(Feel free to use other sources, but please be sure to reference them)

1. What are the various types of optical aberrations?

2. How do the different types of aberrations effect images?

3. What are some ways that aberrations are corrected?

4. What are some common devices that you think might include aberration correction?

5. How do eyeglasses work, and what problems do they fix?

6. Any other relevant questions you may be able to think of.

Final Answer

please find attached



Optics Discussion



What are the various types of optical aberrations?
Optical aberration refers to errors in the image generated by an optical system. There are
six types of optical aberrations, namely; astigmatism, chromatic aberration, coma, distortion,
field curvature and spherical aberration (Erni, 2010).
How do the different types of aberrations effect images?
Astigmatism causes rays of light entering the optical system in either horizontal or
vertical plane to form an ellipse instead of forming a neat focal point with the consequence that
an illusion of directional blur results (Erni, 2010). For rays lying in two orthogonal planes on the
optical axis, astigmatism causes a blur in one direction that is absent in the other direction if the
rays have different foci. On the other hand, chromatic aberration affects images by causing color
fringes to appear across images, consequently leading to the formation of blurred edges that
make it impossible to correctly image object features. Coma affects the image by making the
object plane to appear as a comet-shaped element in the image (Erni, 2010). Distortion affects
the image by making the image to appear as though it is wrapped around a sphere. On another
hand, field curvature affects the image by causing radial defocusing which results in only a
circular crown of the object to be in focus (Erni, 2010). Lastly, spherical aberration causes an
overall loss of focus that is characterized with a blurring effect towards the edge of the optical
system (lens).
What are some ways that aberrations are corrected?
Spherical aberrations can be reduced by using aspherical lens. Spherical aberration can
also be corrected by placing an aperture in front of the lens. Chromatic aberration can be
corrected by either using an achromatic doublet or a monochrome light...

achiaovintel (7231)
UT Austin

Return customer, been using sp for a good two years now.

Thanks as always for the good work!

Excellent job

Similar Questions
Related Tags

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors