Optics Problem: What optical instrument does this?

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SUMMARY

The discussion centers on identifying the optical instrument capable of handling plane waves arriving at different angles, specifically focusing on telescopes. Participants highlight concerns regarding image distortion due to varying angles and the potential use of spherical lenses to mitigate these effects. The convergence points of plane waves are also questioned, emphasizing the importance of lens design in achieving clear images.

PREREQUISITES
  • Understanding of optical principles, particularly wave optics.
  • Familiarity with telescope design and functionality.
  • Knowledge of lens types, including spherical and aspherical lenses.
  • Basic skills in sketching optical diagrams to visualize concepts.
NEXT STEPS
  • Research the principles of wave optics and their implications for image formation.
  • Study different types of telescopes, focusing on their lens configurations and designs.
  • Explore the effects of spherical versus aspherical lenses on image quality.
  • Learn about the convergence of plane waves and its significance in optical systems.
USEFUL FOR

Optics students, telescope designers, and anyone interested in the principles of image formation in optical instruments.

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Homework Statement
Imagine you are using this (2 converging lens system) to image a stellar object with an angular spread of α. (This means, that the object is so far away, that the rays coming from the top of the object arrive at the lens system as plane waves at one angle, and the rays coming from the bottom of the object also arrive at the lens system as plane waves, but at a different angle, and the difference between those angles is α.
Describe the characteristics of the “image”. What optical instrument does this remind you of?
Relevant Equations
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Im thinking that this is a telescope, but I am having a lot of trouble answering this question.

If the plane waves arrive at different angles, wouldn't the image be distorted?Would the lenses possibly be spherical because of this?
 
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Make some sketches. Where do plane waves converge ?
 

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