Transcript Week2-ppt
Trivia Question Who sings the theme song for the “Big Bang Theory”? (a) Numeriklab (b) Ramin Djawadi (c) Justin Bieber (d) Barenaked Ladies (e) Grant Geissman Trivia Question Who sings the theme song for the “Big Bang Theory”? (a) Numeriklab (b) Ramin Djawadi (c) Justin Bieber (d) Barenaked Ladies (e) Grant Geissman Trivia Question Who sings the theme song for the “Big Bang Theory”? (a) Numeriklab (b) Ramin Djawadi (c) Justin Bieber (d) Barenaked Ladies (e) Grant Geissman Trivia Question Who sings the theme song for the “Big Bang Theory”? (a) NCIS - Numeriklab (b) Ramin Djawadi - Game of Thrones (composer) (c) Justin Bieber – The Karate Kid (d) Barenaked Ladies – BIG BAND THEORY (e) Grant Geissman wrote Two and ½ Men theme Fig 5.1 Refraction at a Surface Fig 5.6 Spherical Aberration and Paraxial Approximation Week2-spherical_aberration.avi NOTE: R>0 if the REFRACTED beam through that surface is on the SAME SIDE as the radius of curvature for that surface. R<0 if the REFRACTED beam through that surface is on the OPPOSITE side of the radius of curvature for that surface Sign conventions for lens formulas INCOMING light to optic defines the POSITIVE side for sign convention for So OUTGOING light from optic defines the POSITIVE side for sign convention of Si f>0 represents a CONVERGING lens f<0 represents a DIVERGING lens Table 5.2 Ray Tracing/ Magnification Converging Lens/ Diverging Lens http://www.phys.hawaii.edu/~teb/java/ntnujava/Lens/lens_e.html Longitudinal versus Transverse Magnification Image distorted since magnification in axial direction not same as transverse direction Inversion of image from a lens Inversion with Mirrors The ‘thin lens’ limit of ray tracing is only on simple way of analyzing a system of optical components. Phys 418 – Imaging covers ‘thick lenses’, a matrix approach to ray tracing, and computerized ray tracing. http://www.stellarsoftware.com/ Fisheye Lens ray tracing from Beam4 Cell Phone lens – Note non-spherical surfaces Fig 5.56, Fig 5.57 Examples of reflecting prisms. What are they used for? Fiber Optics Link for animation of total internal reflection http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=49 Another link for animation of total internal reflection http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=16 Endoscopy Cartoon of image of blood vessel on end of fiber optic bundle Imaging quality determined by • Amount of light coupled into fibers • Size of fibers Smaller fibers give Better Resolution Images Distorted due to Resolution Medical Colonoscope Stomach Images and Colon Polyps Stomach Colon Polyps Fiber Communications Different Modes travel at different effective speeds through a fiber Intermodal Dispersion ‘spreads out’ digital optical pulses in a fiber