How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Matt Your Own Question

Matt
Matt, Mechanical Engineer
Category: Engineering
Satisfied Customers: 20805
Experience:  BEng hons Mech engineering, in auto industry 22 years
12772297
Type Your Engineering Question Here...
Matt is online now

Infrared detectorsHi, I need help by someone who is very

Resolved Question:

Infrared detectorsHi, I need help by someone who is very knowledgeable with infrared sensors / detectors etc.I have bought a sleep mask that can detect when a person is in REM sleep (dreaming) The sleep mask has a small circuit board inside with an infrared detector that detects eye movement throughout the night. When the infrared detector picks up a lot of eyeball movement it then knows the person is dreaming and will flash 2 bright LED lights at the closed eyes allowing the dreamer to know when they are dreaming.The device is acurate and does what it says 'on the tin'Anyway, my issues are as follows. I am concerned that all night i have a electronic sensor constantly monitoring my eye for movement. The reason this is a concern is that it could damage the eye / long term problems etc. Im no expert but having infrared detector / device 1mm from the eye all night could be dangerous?This is a passage from their website ........... "The REM-Dreamer uses infrared sensors to detect when you are in REM (dreaming) sleep. At that point the REM-Dreamer gives you sound and light cues (beeps and flashing lights) to remind you that you are dreaming. Thus, external world stimuli are transferred to the world of your dreams, and it becomes easy to achieve lucidity"Please take a look at their website to get full details on this device, thanks youRemDreamer description - http://remdreamer.com/index.phpRem dreamer photos - http://remdreamer.com/rem-dreamer_pro.phpThank you
Terry
Submitted: 11 months ago.
Category: Engineering
Expert:  Matt replied 11 months ago.
HelloThere are two main types of detectors thermal and photonic both of which are what can be termed as a 'passive' devicelooking at circuit board I'd say they are using a thermal detection mechanism as the photonic type need coolingso there's no danger in having these devices close to the skin or eyeas a thermocouple is the most likely option as these are readily available and function by measuring the resistance of a wire junction as it expands with temperature
Customer: replied 11 months ago.
Hi, I have a link to a forum discussion about this. Its vital that i know for sure if this is a danger or nothttp://forum.allaboutcircuits.com/threads/infrared-sensors-detectors.120847/#post-965184
Expert:  Matt replied 11 months ago.
Hello having read the forum I'd agree with the poster 'analog kid' IR receivers tend to be thermal / heat based and don't generate any magnetic field or other radio frequencies which could be dangerousfrom the information provided I'd say the device is safe but to be sure why not contact the manufacturer directly ?
Expert:  Matt replied 11 months ago.
Hido you still need help?Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you
Customer: replied 11 months ago.
Hi, i did contact the manufacturer and they replied with the following'infrared is 100% safe'... but they would say that I guess!
Expert:  Matt replied 11 months ago.
Well yes but then they do have a duty of care too from everything I 've seen on this product I'd say its safe for its intended use
Matt, Mechanical Engineer
Category: Engineering
Satisfied Customers: 20805
Experience: BEng hons Mech engineering, in auto industry 22 years
Matt and other Engineering Specialists are ready to help you

What Customers are Saying:

 
 
 
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
< Previous | Next >
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • walkereng

    walkereng

    Bachelor's Degree

    Satisfied Customers:

    59
    Structural Engineer with over 30 years of experience.
< Previous | Next >
  • http://ww2.justanswer.com/uploads/WA/walkereng/2012-2-2_4226_Brad2.64x64.jpg walkereng's Avatar

    walkereng

    Bachelor's Degree

    Satisfied Customers:

    59
    Structural Engineer with over 30 years of experience.
  • http://ww2.justanswer.com/uploads/ST/StructuralEng/2013-9-10_61545_struct.64x64.jpg StructuralEng's Avatar

    StructuralEng

    Bachelor's Degree

    Satisfied Customers:

    25
    Engineering Expert
  • /img/opt/shirt.png ibosley's Avatar

    ibosley

    Master's Degree

    Satisfied Customers:

    85
    Mechanical Engineering
  • http://ww2.justanswer.com/uploads/VG/vgdlpc/2012-1-17_235838_VICENTEPHOTO.64x64.jpg vgdlpc's Avatar

    vgdlpc

    Master's Degree

    Satisfied Customers:

    17
    Civil Engineer, Major in Structures and Foundations. Professional Engineer 11 years of experience.
  • http://ww2.justanswer.com/uploads/MS/MsAM/2012-6-9_16426_anna.64x64.jpeg Anna's Avatar

    Anna

    Teacher, writer, biologist

    Satisfied Customers:

    270
    Great research skills, variety of work experiences, teaching experience.
  • http://ww2.justanswer.com/uploads/PD/pdheslin/2012-6-6_232056_pambig.64x64.jpg pdheslin's Avatar

    pdheslin

    Consultant

    Satisfied Customers:

    51
    20+ years of internet site creation and search engine optimization. Dozens of search tools at my disposal.
 
 
 

Related Engineering Questions