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- From: norlin@midway.ecn.uoknor.edu (Norman Lin)
- Newsgroups: sci.electronics
- Subject: DreamLight Construction Ideas (was Re: 'DreamLight' wanted!)
- Message-ID: <By2nzz.1C2@constellation.ecn.uoknor.edu>
- Date: 21 Nov 92 15:21:35 GMT
- Article-I.D.: constell.By2nzz.1C2
- References: <1992Nov16.111944.4390@kth.se> <1ekic8INNlak@MINERVA.CIS.YALE.EDU>
- Sender: usenet@constellation.ecn.uoknor.edu (Usenet Administrator)
- Organization: Engineering Computer Network, University of Oklahoma, Norman, OK, USA
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-
- stansbury-travis@yale.edu (Travis Stansbury) writes:
-
- >Net-scepticism aside, this IS sci.electronics, and since I think most of
- >would agree that a cool grand is a little spendy for a pair 'o flashig
- >goggles, how would one actually construct this particular beast. I've
- >read the swim-goggle shotgun idea (and think it sounds pretty logical),
-
- What is the swim-goggle "shotgun" idea -- just bombard you with the LED
- flashes every 30 minutes or so?
-
- >but what if one wanted to really make a pair that detected REM sleep
- >before triggering the LED's - how hard would this be, and does it
- >involve enough complex circuitry to warrant a $1000 price tag?
-
- I recall reading somewhere that the reason it's so expensive is that
- it's adaptible and configurable. You can set the length of the
- flashes and some other parameters that I can't remember right now.
-
- I believe (does anyone know?) that the DreamLight detects REMs via
- a physical sensor mounted on the eyelids during sleep. If you close
- your eyes and hold your finger lightly against your closed eyelid,
- you'll feel when you move your eye around, since your cornea protrudes
- a bit from the rest of the eyeball. A sensitive switch or pad of
- some sort could detect this.
-
- If this is indeed the way the DreamLight works, then some sort of
- software would be needed to decide when your eye movements actually
- indicate REM sleep and when they just indicate regular eye movements.
- If you have a PC (not necessarily IBM, just a computer), it seems to me
- that it would be conceptually trivial to feed the signals from
- the eye-movement-detector into the PC, then have the PC control the
- flashes, etc. (all the tweaking about timing, sensitivity threshhold,
- etc would be controlled through software).
-
- My question: what sort of a sensor would be delicate enough to detect
- the slight bulge of the cornea moving around beneath the closed eyelid,
- without causing uncomfortable pressure on the eye?
-
- Norman
- norlin@mailhost.ecn.uoknor.edu
-