Laboratory work, magnification

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Discussion Overview

The discussion centers on determining the magnification of an interference pattern projected onto a CCD sensor using an aperture lens. Participants are exploring the relationship between lens specifications and the resulting image size on the CCD, with a focus on practical application in laboratory work.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether a lens labeled as 100x actually results in a 100x magnification of the interference pattern on the CCD.
  • Several participants request additional details about the lens and CCD specifications, including the diameter of the aperture lens and its focal length, as well as the size and pixel count of the CCD.
  • Specifics provided include a CCD with dimensions of 2448x2050 pixels and a pixel size of 3.45 µm, along with a suggested lens of 10x magnification and a numerical aperture (NA) of 0.3.
  • Another participant emphasizes that simply projecting the pattern into the camera lens may not yield a magnified image, implying a need for a deeper understanding of optical principles.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the method for determining magnification, with multiple viewpoints and questions remaining unresolved regarding the specifics of optics and the relationship between lens characteristics and image magnification.

Contextual Notes

Limitations include the lack of clarity on how various lens parameters influence magnification and the assumptions made about the optical setup. There are unresolved questions about the necessary conditions for achieving the desired magnification.

nordmoon
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I am working with interference which pattern I want to magnify to a CCD. The question is how can I determine the magnification of the interference pattern to the CCD? An aperture lens is used. I know the CCD cell size.

It is not enough to say that the lens is 100x .. then the magnification is 100?
 
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Can you give us some details on your lens and CCD?
What is the diameter of the aperture lens, the focal length, etc.
How big is your CCD? How many pixels? How big are the pixels?
 
Drakkith said:
Can you give us some details on your lens and CCD?
What is the diameter of the aperture lens, the focal length, etc.
How big is your CCD? How many pixels? How big are the pixels?

CCD have 2448x2050 and pixel size is 3.45um.
A lens that can be used is for example 10x, NA = 0.3.
 
You can't just shine the pattern into the camera lens and expect to get a magnified image.

Do you have a knowledge of optics?
 

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