tag:blogger.com,1999:blog-1924948806084793655.post6132609887656555446..comments2023-09-26T11:36:56.423-04:00Comments on Machine Vision 4 Users: The influence of heat on LED lightingUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-1924948806084793655.post-90440814717171681402011-09-06T10:28:26.858-04:002011-09-06T10:28:26.858-04:00Good post! I knew of output power derating versus ...Good post! I knew of output power derating versus temperature, but I hadn't much considered wavelength shift before. I'll bet the issue of compatibility with bandpass filters has fooled some people before. "We're losing light -- the LED must be dying!"<br /><br />With that in mind, I went to Lot-Oriel's site. An interesting find (http://www.lot-oriel.com/files/downloads/andover/en/standardbandpassfilters.pdf) is that bandpass filters have temperature dependent wavelength shifts that are typically smaller magnitude than LEDs, but there is some overlap with certain types! Thus, if you're careful, you may be able to match the two up and live happily with reasonable temperature variations. We leave the details as an excersise. Meaning, of course, I'm too lazy to do it myself. :-)<br /><br />SpencerSpencer Lusterhttp://www.lw4u.comnoreply@blogger.com