You would like to design an afocal Keplerian telescope. Start by…

Question You would like to design an afocal Keplerian telescope. Start by… You would like to design an afocal Keplerian telescope. Start by drawing a sketch of what this means. These are the specifications you are given:Magnification = -2Wavelength = 500 nmObject size = 5 mmDiffraction limited spot diameter = 2 mu?mLenses no faster than F/1NA of objective lens = 0.305F?or simplicity, assume that the object is at the front focal plane of the first lens.Locate the aperture stop appropriately to give a telecentric imaging condition. Think about the following questions: Where are the entrance and exit pupils? Size the lenses appropriately to put the field stop at the object. Where are the entrance and exit windows? Draw out the system including the marginal and chief rays.In order to avoid vignetting on the lenses (i.e. so that neither lens is the field stop), what is the minimum diameter for the first lens? Express your answer in mm with three significant figures.H?int: This is a very common calculation, so worth understanding. Consider what ray is the worst case for vignetting at the lenses. Also remember you have a limit on the F/# of each lens. This is enough information to solve the problem. Science Physics COURSERA 001 Share QuestionEmailCopy link Comments (0)