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• 19:57, 6 January 2009 EricN (Talk | contribs) uploaded "File:Phase sensitive detection ckt.jpg" ‎ (Circuit diagram of the phase sensitive detector)
• 19:52, 6 January 2009 EricN (Talk | contribs) uploaded "File:Schematic of phase sensitive detection.jpg" ‎ (PSpice circuit diagram for phase sensitive detection)
• 20:37, 12 December 2008 EricN (Talk | contribs) uploaded "File:XY position.jpg" ‎ (Shows currents and distances for calculating position using a duo-lateral position sensing device)
• 19:55, 12 December 2008 EricN (Talk | contribs) uploaded "File:Lateral effect psd.jpg" ‎ (Duo-lateral position sensitive detector currents)
• 19:53, 12 December 2008 EricN (Talk | contribs) uploaded "File:Lateral effect psd.gif" ‎ (Currents in a duo-lateral position sensing device.)
• 16:55, 12 December 2008 EricN (Talk | contribs) uploaded "File:Photoelectric effect.gif" ‎ (The photoelectric effect causes current to flow as light strikes the sensing area, with output currents proportional to the proximity between the terminal and the light centroid)
• 16:02, 12 December 2008 EricN (Talk | contribs) uploaded "File:Field of view.gif" ‎ (Field of view of an optical sensor with a converging lens)
• 15:37, 12 December 2008 EricN (Talk | contribs) uploaded "File:Image plane.gif" ‎ (Relationship between object distance, focal plane and image plane)
• 15:21, 12 December 2008 EricN (Talk | contribs) uploaded "File:Focal plane.gif" ‎ (Collimated beam of light not parallel to lens axis congverging to focal plane)
• 15:02, 12 December 2008 EricN (Talk | contribs) uploaded "File:Focal length.gif" ‎ (A convex lens converges parallel beams of light to the focal point.)
• 14:47, 12 December 2008 EricN (Talk | contribs) uploaded "File:Focal length.gif" ‎ (Parallel beam of light converges at focal point of lens)
• 13:57, 12 December 2008 EricN (Talk | contribs) uploaded "File:Lens types.png" ‎ (Drawing of the different types of lenses, courtesy of http://en.wikipedia.org/wiki/Lens_(optics))
• 23:05, 11 December 2008 EricN (Talk | contribs) uploaded "File:Refraction.jpg" ‎ (Basic image demonstrating the concept of light refraction)
• 22:39, 11 December 2008 EricN (Talk | contribs) uploaded "File:Filters.jpg" ‎ (A set of neutral density and colored filters, courtesy of wikipedia.)