Health, Special Report, Americas
Posted: 08 Jun 2022 02:14
This use of sound has its limitations -- for example, if you try taking a picture from inside a tour bus with the windows closed, the sound waves will bounce off of the window instead of the subject and so focus the lens incorrectly. This Polaroid system is a classic active system. It is called "active" because the camera emits something (in this case, sound waves) in order to detect the distance of the subject from the camera. Infrared systems use a variety of techniques to judge the distance. For example, this patent describes a system that reflects an infrared pulse of light off the subject and looks at the intensity of the reflected light to judge the distance. Infrared is active because the autofocus system is always sending out invisible infrared light energy in pulses when in focus mode. It is not hard to imagine a system in which the camera sends out pulses of infrared light just like the Polaroid camera sends out pulses of sound.
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2940857 8012714
434075 6971071
51446 980982
3670222 1741367
9793815 3967232
3924329 9490359
305257 2151150
7132318 7635401
4815967 9998910
4625754 5286988
8677587 725966
2278387 8376531
1851883 3133827
6620366 9595833
5474561 8829230
2760001 7366536
3595643 5259409
1448240 564217
3665300 2546880
5146278 8210419
1883768 4598000
5427582 5863378
1992600 7444826
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8609752 291750
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392647 8237418
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3024107 5308748
6162795 6138967
9832371 6294879
5711841 6533432
2856056 5675005
9007666 336388
5182671 7431771
6130373 6258628
9466742 7780927
http://www.forumcanavar.net/viewtopic.p ... 15#p935515
https://forum.anastasiausa.land/viewtop ... 12&t=20577
https://13mm.ru/forum/viewtopic.php?t=23087
http://managementtools.groupperform.com ... nt-1455668
https://sportvaganza.com/showthread.php ... #pid792941
https://cantotalk.com/viewtopic.php?f=11&t=261214
http://www.forumcanavar.net/viewtopic.p ... 51#p935351
http://reacharound.club/viewtopic.php?f=4&t=89347
https://www.currencylovers.com/forums/s ... 3#pid21163
http://youthnetradio.org/tmit/forum/for ... #pid554808
http://www.dev.hydes.in/analytix1/kunen ... as#4235727
http://reacharound.club/viewtopic.php?f=4&t=89334
http://www.veterans-zone.com/forum/inde ... cas-world/
http://lifeanddeathforum.com/showthread ... pid1455545
http://springwoodslasher.com/forum/show ... post204566