IR system for motorcycles
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Re: IR system for motorcycles
by M.L.-2
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On Tue, Nov 3, 2009 at 2:51 PM, NOPE9 <yes@...> wrote:
> I saw this on another list > >> http://thekneeslider.com/archives/2009/10/16/motorcycle-night-vision/ > > How likely is is that one could duplicate this with a USB CMOS camera > and an IR filter ? > What is the state of IR illuminators ? > What iR spectrum would be the best ? > > Gus Several years ago I was playing around with a cheap CCD webcam and I noticed that it had a filter to block IR. With the filter removed it worked pretty well in the dark. I'm sure it's not as good as the camera that individual is using, but it would be worth a try. -- Martin K. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: IR system for motorcycles
by Peter van Hoof-2
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----- Original Message ---- > From: NOPE9 <yes@...> > To: Microcontroller discussion list - Public. <piclist@...> > Sent: Tue, November 3, 2009 1:51:50 PM > Subject: [EE] IR system for motorcycles > > I saw this on another list > > > http://thekneeslider.com/archives/2009/10/16/motorcycle-night-vision/ > > How likely is is that one could duplicate this with a USB CMOS camera > and an IR filter ? > What is the state of IR illuminators ? > What iR spectrum would be the best ? > > Gus While the idea is good, I wish I would be able to see better at night on my bike. It seems it would create more danger than it would solve if you had to look down to your dash to see what's ahead of you. Some kind of head up display might work better but could be distracting and introduce new dangers. Peter van Hoof -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: IR system for motorcycles
by Thomas C Sefranek
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----- Original Message -----
From: Peter van Hoof To: Microcontroller discussion list - Public. Sent: Tuesday, November 03, 2009 7:34 PM Subject: Re: [EE] IR system for motorcycles While the idea is good, I wish I would be able to see better at night on my bike. It seems it would create more danger than it would solve if you had to look down to your dash to see what's ahead of you. Some kind of head up display might work better but could be distracting and introduce new dangers. Peter van Hoof I do it all the time,... the GPS on the motorcycle. Tom-tom Rider is specifically for motorcycles. At night I LIKE having a heads up display of the road ahead. * | __O Thomas C. Sefranek tcs@... |_-\<,_ Amateur Radio Operator: WA1RHP (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz ARRL Instructor, Technical Specialist, VE Contact. http://hamradio.cmcorp.com/inventory/Inventory.html http://www.harvardrepeater.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: IR system for motorcycles
by Sean Breheny
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Unfortunately, not very likely at all.
The IR light which normal CCD sensors can see is just below red on the human vision spectrum. It is shorter than 1 micron in wavelength. It is called near-IR because it is close to the visual spectrum. The IR light which FLIR cameras can see is in the 6 to 20 micron wavelength range. It is VERY different from near-IR (6 to 20 times lower frequency). It is naturally emitted by all objects above absolute zero, to varying degrees depending on the surface characteristics of the material. The non-contact thermometers and passive-IR motion sensors look at this longwave IR, but those sensors are, of course, not imaging sensors. On top of that, the passive-IR ones are, I think, only sensitive to changes in IR illumination. Longwave IR cameras typically use microbolometer arrays (an array of cooled temperature sensors which sense slight temperature changes from IR light hitting them) or more recently, exotic semiconductor focal plane arrays (materials like Mercury-Cadmium-Telluride (HgCdTe) or Indium-Antimonide (InSb) or for the less sensitive ones, Lead Sulfide (PbS)). This is the same technology used in military FLIR and heat-seeking weapons. Note that even "night-vision goggles" sometimes do not work work using longwave IR. Some do. Some simply intensify ambient visible light from the moon or stars or skyglow of a city. The least expensive (like the "IR night vision" mode on consumer cameras) is just a CCD without a near-IR filter along with a bunch of near-IR LEDs to create bright illumination which is not visible to the human eye. Sean On Tue, Nov 3, 2009 at 1:51 PM, NOPE9 <yes@...> wrote: > I saw this on another list > >> http://thekneeslider.com/archives/2009/10/16/motorcycle-night-vision/ > > How likely is is that one could duplicate this with a USB CMOS camera > and an IR filter ? > What is the state of IR illuminators ? > What iR spectrum would be the best ? > > Gus > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: IR system for motorcycles
by Sean Breheny
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Just want to correct myself on one thing: microbolometers typically do
NOT need to be cooled and FPAs typically DO need to be cooled. See: http://en.wikipedia.org/wiki/Focal_plane_array http://en.wikipedia.org/wiki/Microbolometer Sean On Wed, Nov 4, 2009 at 1:02 AM, Sean Breheny <shb7@...> wrote: > Unfortunately, not very likely at all. > > The IR light which normal CCD sensors can see is just below red on the > human vision spectrum. It is shorter than 1 micron in wavelength. It > is called near-IR because it is close to the visual spectrum. > > The IR light which FLIR cameras can see is in the 6 to 20 micron > wavelength range. It is VERY different from near-IR (6 to 20 times > lower frequency). It is naturally emitted by all objects above > absolute zero, to varying degrees depending on the surface > characteristics of the material. > > The non-contact thermometers and passive-IR motion sensors look at > this longwave IR, but those sensors are, of course, not imaging > sensors. On top of that, the passive-IR ones are, I think, only > sensitive to changes in IR illumination. > > Longwave IR cameras typically use microbolometer arrays (an array of > cooled temperature sensors which sense slight temperature changes from > IR light hitting them) or more recently, exotic semiconductor focal > plane arrays (materials like Mercury-Cadmium-Telluride (HgCdTe) or > Indium-Antimonide (InSb) or for the less sensitive ones, Lead Sulfide > (PbS)). This is the same technology used in military FLIR and > heat-seeking weapons. > > Note that even "night-vision goggles" sometimes do not work work using > longwave IR. Some do. Some simply intensify ambient visible light from > the moon or stars or skyglow of a city. The least expensive (like the > "IR night vision" mode on consumer cameras) is just a CCD without a > near-IR filter along with a bunch of near-IR LEDs to create bright > illumination which is not visible to the human eye. > > Sean > > > On Tue, Nov 3, 2009 at 1:51 PM, NOPE9 <yes@...> wrote: >> I saw this on another list >> >>> http://thekneeslider.com/archives/2009/10/16/motorcycle-night-vision/ >> >> How likely is is that one could duplicate this with a USB CMOS camera >> and an IR filter ? >> What is the state of IR illuminators ? >> What iR spectrum would be the best ? >> >> Gus >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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