Lab Report #5 Lenses 2
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Rochester Institute of Technology *
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Astronomy
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Apr 3, 2024
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docx
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Uploaded by DoctorDugongMaster1147
Lab #5 Lenses 2
Laboratory Report
Fundaments of Imaging Science
Instructor: Dr. Anthony Vodacek Stephen D. Gayle
Section 1
1
8/26/2019
Introduction The purpose of this experiment is to explore one type of aberration and image formation with 2 lens systems. You will observe the image formation characteristics of chromatic aberration and magnification with two types of telescope.
Methods
The first thing we did was set up the distances to get good readings. Light source at 1000 mm away; the magnification lens 200 mm from the light source. The next thing we did was measure the white light and moved a sheet of paper until the image on the bulb came into focus at its sharpest. Then recorded the entry, did the same with the red light and blue light. We had gone through this process 3 times because we had results that didn’t line up with what you’d expect the first couple of times.
The other part of the experiment, we took a ruler and put one lens on the end and moved the other lens closer and further away until we got the exit signs in focus and guesstimated the magnification.
Results
Z2 focus: 320 mm
Red Light z2: 1st: 310 mm 2nd: 250 mm
Blue Light z2: 1st: 300 mm 2nd: 260 mm
3rd take:
White: 265 mm
Red: 270 mm
Blue: 255 mm
Lens A f: 130 mm
Lens B f: 35 mm
Lens C f: -35 mm
Image Target: Exit sign
Observation
Image
Orientation
Observed
Magnification
Calculated Magnification
Telescope 1
(Kepler Telescope)
Inverted
5 + 3 + 2 + 1.5 / 4 =
2.9
(130 / 35) = -3.7
Telescope 2 (Galilean Telescope)
Upright
10 + 5 + 4 + 2 / 4 = 5.25
(130 / -35) = 3.7
2
8/26/2019
Discussion
From the results above, you can see we had to run through trial and error with the first part of the experiment because we got results that didn’t match what we would expect. That being red light would show the image the sharpest further away, blue light being the closet, and white light in the middle of those two. This has showed me that, when taking measurements, you always try to take multiple records. This process lead us to eliminate as much error as we could to get while getting the measurements. Therefore, it gave us the measurements that aligned with what you would expect. We should use this in future experiments. 3
8/26/2019
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