Does anyone know how to read these diagrams?

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In summary, the conversation discusses the spot diagram and graph of longitudinal abberation for an apochromatic lens quadruplet. The 'y' axis in the LA graph represents the radius of the pupil while the 'x' axis represents the position of best focus. The spot diagram indicates the degree of coma and the size of the spot is the size of an image of a point source on the detector. The desired size of the spot depends on the detector, image requirements, and budget.
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This is a spot diagram and graph of longitudinal abberation (LA) for an apochromatic lens quadruplet. I know that the LA graph should ideally come to a point for all wavelengths and it appears to in the graph but what is the 'y' axis? Is it the direction of focus? What does the 'x' axis mean?

The spot diagram seems to indicate the degree of coma as you move the lens off axis from the incoming ray bundle. I guess small spots are better than larger ones but how small is good?

Any help?

Thanks.
 

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In the longitudinal abberation diagram the vertical axis is the radius of the pupil, the horizontal axis is the position of best focus. SInce the aberation is symetrical you only draw one side of the axis.

In the spot diagram the size of the spot is the size an image of a point source will be on you detector. How big/small this has to be depends on the detector, your image requirements and how much money you have!
 

1. What do the different symbols and lines in the diagram mean?

The symbols and lines in a diagram represent different elements, connections, or relationships between elements. Each diagram is unique and may have different symbols and meanings, so it's important to refer to the legend or key provided with the diagram for specific information.

2. How do I interpret the information presented in the diagram?

The key to interpreting a diagram is to understand the context and purpose of the diagram. Start by looking at the title and labels of the diagram to get an idea of what it is trying to convey. Then, follow the arrows and lines to see the connections and relationships between elements. It may also be helpful to refer to any accompanying text or explanations.

3. Are there any rules or guidelines for reading diagrams?

While there may be some general guidelines for reading diagrams, such as following the direction of arrows and understanding the scale of the diagram, each diagram may have its own specific rules or conventions. Again, it's important to refer to the legend or key for specific information.

4. How can I use this diagram to help me understand a concept?

Diagrams are often used to visually represent complex information or relationships between elements. To use a diagram to understand a concept, start by identifying the main elements and connections shown in the diagram. Then, try to relate these elements and connections to the concept you are trying to understand. The diagram can serve as a visual aid to help you better grasp the concept.

5. Are there any alternatives to using diagrams to convey information?

While diagrams can be helpful in presenting complex information in a visual format, there are other ways to convey information as well. Some alternatives to diagrams include written explanations, tables, charts, and graphs. The best way to determine the most effective way to convey information is to consider the audience and the type of information being presented.

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