 | | Re: Spybot studies: SetTxDirection() confusion —Brian B. Alano
| | | | (...) Yes, there are multiple IR emitters. Two in front at nearly 90 degree angles, one in back, and a high-power one pointing up. Turns out my camera was only picking up the high-power emitter. I tried again with a different camera (the Vision (...) (21 years ago, 7-Nov-03, to lugnet.robotics.spybotics)
| | | | | | | | | | Re: Spybot studies: SetTxDirection() confusion —Philippe Hurbain
| | | | | (...) I think these emitters are different wavelength, 940nm for the pointing up one, 880nm for the others. 940nm radiation is very close to red wavelength range and is easily seen by cameras CCD, even though they generally include an IR filter to (...) (21 years ago, 7-Nov-03, to lugnet.robotics.spybotics)
| | | | | | | | | | | | IR leds, was Re: Spybot studies: SetTxDirection() confusion —Philippe Hurbain
| | | | | ... Just reading an old post and saw my mistake: of course 880 nm is closer to red (650nm) than 940nm !!! Here is the correct text I should have sent : "I think these emitters are different wavelength, 880nm for the pointing up one, 940nm for the (...) (21 years ago, 14-Nov-03, to lugnet.robotics.spybotics)
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