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DENNIS HANCOCK |
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Dennis@DennisHancock.com |
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Me |
My Profile |
My Brain |
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I Develop Custom 3D Modeling And Simulations For Challenging Science and Engineering Problems. | ||||||||
My Resume |
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3D Technical Modeling Examples I've Authored | ||||||||
3D Ray Tracing The Atmosphere |
3D Ray Tracing A City |
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3D Ray Tracing A Walking Man |
3D Ray Tracing From Space |
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SAR Lab Experiment |
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Haptics |
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Raytraced Echo Paths For A Bi-static Radar, |
The Coolest Thing Ever Done With Computers. Still. Click For The Details |
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Some Optics Efforts I've Modeled With My Own Softwares | ||||||||
Fixing The Hubble Telescope With Virtual Reality |
Procedural Ray Tracing |
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Geometric Distortion |
Adaptive Optics |
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An AO Testbed I Developed | |||||||
Ultra High Precision Optical Geometric Distortion Measurement |
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For Measurement Of Geometric Distortion To 10nm Levels, It's Mandatory To Know The Exact Shape of Your System's Point Spread Function Across The Entire Field. Here, I Show My Computations Of The Axial PSFs For A Single Field Position For The Ideal Case Of Aberration Free Imaging And Three Realizations Of System Apodization. "If you don't model it, you're likely not to measure it." |
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Partially Coherent Imaging With DeFocus Aberration |
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Some Imaging Applications Need To Consider Electric Field Coherency And Optical Aberrations To Predict Performance With High Accuracy. Here, Diffraction Elliptical Spot Images Are Formed On A Tilted Plane Assuming Incoherent, Partially Coherent, And Fully Coherent E-Fields With Varying Amounts Of Defocus Aberration. A Hypothetical Optic Is Trying To Form The Same Image (Green Oval) In All Frames. A Transparent, Black Box is Drawn For Reference. Aberrations From An Actual Optical Design Are Easily Accommodated And Alter These Results Accordingly. Vertical Scaling Is Log10 And All Frames Are Normalized By The Aberration Free Case. Click Here For Other Advanced Examples "If you don't model it, you'll likely not understand it." |
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Extremum Raytrace For A Free Electron Laser (FEL) X-Ray Beamline |
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The 'Blue', 'Green', and 'Pink' Rays Are Controlled By The X-Ray Optical Elements The Lethal And Destructive 'Black' Rays Are Not Controlled In This Early Design A Single, On-Axis Source Ray Scanning +/- 6mm Is Modeled Here "You do not want to operate this high power x-ray laser beamline until you model it." |
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Satellite Altimeter Radar Echo Return Over An Ocean/Land Interface |
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This simulation shows the return echo from a satellite radar situated over a 3D lidar-acquired island model (42.583368N, 10.079077E.) The altimeter is placed 695Km above the white square (lower left,) ensuring first returns come from land. This island has a maximum height of 29 m and an average height of 10m above the sea. Each frame is spaced by 3.125 nano-seconds. Color coded returns: Vegetation-->Green; Land and Buildings-->Red; Rough, Gaussian Ocean-->Yellow. |
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Send an e-mail to: Dennis Author:Dennis M Hancock Last Updated: 5Nov18 |
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Cogito. Ergo Scio. |
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All Text, Pictures, and Animations on this website are copyrighted by the author | ||||||||