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Clip summary all WinLens3D clips tell a friend
Ghosts occur when light is reflected from a transmissive surface and then follows an undesigned course. The ghost may cause:
- material damage if it is a high power system and the path has an internal image inside a material
- ghost image - if the ghost path has a focus near the detector
- flare - if the ghost path has a focus far aay from the detector
The number of possible ghosts increases with the square of the number of optical surfaces in the system.
We show how to use the ghost table to search quickly for troublesome ghost paths, and how to use the ghost graph for a detailed analysis of the path, via a lens drawing or a footprint plot.
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Keywords for all clips
3d[4] 3d model[1] aspheric[1] aspherics[1] assembly[1] astigmatism[1] autofocus[1] beam waist[1] bookmark[1] camera[1] cdgm[1] cemented doublet[1] cemented triplet[1] chief ray[1] component[1] component tilt[2] conic[1] copy[1] customise[1] decenter[4] defaults[1] density[1] depth of field[1] depth of focus[1] distortion[1] dove[1] drawings[2] editing[1] education[7] envelope[1] flare[1] fold mirror[1] freeze[1] gaussian beam[1] ghost[1] glass[2] glass manager[2] glass map[1] graphics[1] hikari[1] hints[1] hoya[1] introduction[5] iso0110[1] iso10110[5] isoplanetism[1] language[1] laser[1] laser damage[1] lateral colour[1] lens drawing[1] lens families[1] lens selection[1] longitudinal aberrations[1] machine vision[4] machvis[4] manufacturing errors[2] material editor[1] melt[1] monte carlo[2] n-v plot[1] ohara[1] optical glass[1] optical path difference[1] pan[1] paraxial[3] paraxial raytrace[1] partial dispersion[1] penta[1] polish[1] polygon scanner[1] porro[1] predesigner[3] principle ray[1] prism[1] ray fan[1] rayleigh range[1] refractive index[1] scanner[1] schott[1] scratch[1] seidels[1] sensitivity[2] setup[1] simulation[1] sine condition[1] sliders[1] solid model[1] spherical[1] sumita[1] surface[1] surface data table[1] surface tilt[2] symbols[1] thin lens[3] tilt[4] tolerancer[4] tolerances[5] tolerancing[2] toroid[1] transverse ray aberration[1] v-value[1] winlens[9] winlens3d[3] x-xy scanner[1] zoom[1] zoom lens[1]