Show pageBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Camera & Lighting-System ====== ===== Choose a Lense ===== * http://www.scorpionvision.co.uk/industrial-camera-optics-blog/new-near-and-far-field-m12-lenses, https://scorpionvision.worldsecuresystems.com/Catalog/Machine-Vision-Lens/m12-lenses/near-field-far-field-m12-lenses/s-mount-8mm-macro-lens * {{ :maschine:pickandplace:lens_and_sensor_compatibility_by_scorpionvision.pdf |}} {{ :maschine:pickandplace:m12lenswhitepaper.pdf |}} * https://www.ptgrey.com/tan/10694 * http://www.vision-doctor.com/en/optical-basics/mod-and-close-up-rings.html * Check: MOD minimum object distance? for which chip sensor size is the lense designed? ==== Bottom Camera ==== ^ Lens ^ Working Distance (Focus Layer to Camera PCB top) ^ FOV ^ Pixel/mm ^ Images ^ | 6mm | 66.5mm | 20mm x 16 mm | 59 | {{:maschine:pickandplace:fov_lens6mm_dist66.5mm.png?140}} | | 12mm | 115.5mm | ~20mm x 16 mm | 48 | {{:maschine:pickandplace:fov_lens12mm_dist115.5mm.png?140}} | ===== Downcam-Lighting ===== ^ Images/Files ^ Type ^ Description ^ Evaluation ^ Snapshots ^ | {{maschine:pickandplace:head_light_diffusor.png?200}} | kind of direct light with diffusor printed | Inserted 2 led strips shining through the ABS plastic. | Most default pipelines work with this lighting setup. Glossy finishes (HASL/white silkscreen) won't work well (mirror effect). | | | {{:maschine:pickandplace:20170918_212846_hdr.jpg?200}} {{:maschine:pickandplace:lighting-setup.jpg?200}} | direct polarized | linear polarizing filters (0° in front of led strips, 90° as cap before camera) | no glare, perfect, but the metal parts are do dark and don't contrast other pcb colors any more | {{:maschine:pickandplace:comparison_polarized_vs_unpolarized.jpg?400}} | | {{:maschine:pickandplace:dome-setup.jpg?200}} | tunnel dome v1 | tunnel dome diffuses the light from led stripes | no glare on pcbs. on feeders a little glare, but okay. in the center the camera will be mirrored in pads (if they are glossy), fiducials are good to recognize | {{:maschine:pickandplace:dome-comparison.jpg?400}} | | {{:maschine:pickandplace:dome_v2-setup.jpg?200}} {{:maschine:pickandplace:20170919_211256_hdr.jpg?200}} | tunnel dome v2 | tunnel dome diffuses the light from led stripes | like v1 but wider to have a larger illuminated area | {{:maschine:pickandplace:dome_v2_comparison.jpg?400}} | | | ringlight with diffusor | tested but results were too bad (glare, leds mirror on pcb) | | | ==== Links for further reading ==== * https://groups.google.com/forum/#!topic/openpnp/7yUivDAALIg * http://www.ni.com/white-paper/6901/en/ * http://www.cognex.com/ExploreLearn/UsefulTools/LightingAdvisor/?langtype=1033 maschine/pickandplace/camera_lighting.txt Last modified: 2019/03/11 00:00(external edit)