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Tutorial 6 - Chief and Marginal Rays, YNU

DThis tutorial explores two important paraxial rays: the chief and marginal rays. In addition we show how to trace these rays in a YNU ray trace... the spread sheet can be downloaded below. If you click the file it will attempt to open in a browser. If you want the excel sheet, click the downward pointing arrow at the far right.

Update April 2015. Here is an AWESOME online YNU sheet

Homework questions for Optics #6:

1.A single refractive surface is used to image an object. The object is 100 mm away and is 7.5 mm tall. The refractive surface has a 100 mm convex radius of curvature and an index of 3.2. Use a YNU ray trace to determine the image location and height.
– Extra credit: Use the lens makers equations to check image location and similar triangles to check your image height.
2.A biconvex singlet is used to visual observe a image. Conduct a YNU ray trace for the eye’s fovea. Assume:
– Eye has a pupil diameter of 5 mm
– Eye relief of 25 (eye is 25 mm from lens)
– Edmund lens #32624
• Radius of 50.8 mm
• Lens thickness of 5.0 mm
• N-BK7 (index of 1.5168 at 587 nm) Fovea has a 1° half angle (chief ray angle

Discuss and comment on YouTube.

Homework solutions here.
Scott Sparrold,
May 8, 2012, 6:54 AM