Timeline for How good are Time-Of-Fligt (light) sensors for measuring small objects?
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
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| May 25, 2021 at 22:57 | vote | accept | euraad | ||
| May 25, 2021 at 22:33 | comment | added | euraad | @user1850479 Laser diode + a CMOS sensor + filter? And the precision were? | |
| May 25, 2021 at 22:28 | comment | added | user1850479 | I used a cheap laser diode module with adjustable focus (few dollars on Amazon) and a webcam with the lens removed. Getting the laser intensity low enough to see on a CMOS sensor without saturation required an reflective attenuating filter for attenuation at the lowest current the diode would lase, which was more expensive. | |
| May 25, 2021 at 20:56 | comment | added | euraad | @user1850479 Thank you! What laser did you use? Cheap components or very expensive? Do you have a article number? | |
| May 25, 2021 at 20:52 | comment | added | user1850479 | I'd probably do the laser+trigonometry approach then. You can possibly find chips that integrate the laser and sensor or make your own. I actually built something similar for a related project where the object couldn't translate but it could tilt and it works quite well. Can easily back out two axis of tilt (by assuming no translation) to tiny fractions of a degree. You could do the reverse and solve for translation. | |
| May 25, 2021 at 20:40 | history | edited | Mitu Raj | CC BY-SA 4.0 |
edited title
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| May 25, 2021 at 19:32 | comment | added | euraad | @user1850479 The target only translate. No, this will be a very slow motion. I need to measure and get a least an analog value. | |
| May 25, 2021 at 19:12 | comment | added | user1850479 | Does the target rotate or only translate? Do you care about motion perpendicular to the ranging axis? Micron class accuracy is pretty doable with a laser pointer and a webcam if the object can't rotate (just look at which pixel the laser beam hits and do the trigonometry). | |
| May 25, 2021 at 19:06 | answer | added | Synchrondyne | timeline score: 1 | |
| May 25, 2021 at 18:20 | history | edited | Transistor | CC BY-SA 4.0 |
added 5 characters in body; edited title
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| May 25, 2021 at 18:18 | answer | added | D.A.S. | timeline score: 2 | |
| May 25, 2021 at 18:16 | history | undeleted | euraad | ||
| May 25, 2021 at 17:56 | history | deleted | euraad | via Vote | |
| May 25, 2021 at 17:43 | history | asked | euraad | CC BY-SA 4.0 |