Assign2s - ECSE 527 Optical Engineering 2010 Solution to...

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ECSE 527 Optical Engineering 2010 Solution to Assignment # 2 Problem # 1 Here is how the Lens Data Manager (LDM) looks like once all the data is entered. Fig. 1: LDM Fig. 2: YZ Cross-section of the system
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Questions 1. By how much did you have to tilt the middle mirror? [1] -30 degrees 2. What is the separation between the third mirror and the first of the three lenses at the output of the system? [1] -71.7987 mm 3. What are the EFL, FFL, BFL and f/# of this system? (Hint: Look at [Display -> List Lens Data -> List All Data]) [4] 4. This system is a simplify version of a binocular. What magnification can it provide? Show your calculations. [1] For afocal systems, the magnification power is defined as the ratio between the entrance pupil diameter (CA o ) and the exit pupil diameter (CA e ). The transverse magnification on the other hand is equal to 1/MP, i.e. 0.539. 5. What is the function of the three mirrors? Explain what they do and support your argument with graphics from Code V. [2] The mirrors form an erecting system. If you look at the rays shown on fig. 2, you can see that the upper marginal ray at the entrance is still over the optical axis at the exit. 6. The configuration of the three mirrors has a fundamental flaw that makes it useless for terrestrial observations, what is it? How could it be corrected? (Hint: Look at a XZ cross-section of the system.) [2] The mirrors don’t correct the left-to-right inversion caused by the lenses. It could be corrected by adding a similar system of mirrors working in the XZ plane or, as it is done in real binoculars, by changing the mirrors for a Roof or Porro prism.
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7. The last three lenses of the system constitute the binocular eyepiece. What are the
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This note was uploaded on 09/28/2010 for the course ECSE ECSE 527 taught by Professor Kirk during the Winter '10 term at McGill.

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Assign2s - ECSE 527 Optical Engineering 2010 Solution to...

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