On Tue, 17 Oct 2000 04:39:22 +0700 Eko Priono <[EMAIL PROTECTED]> wrote: > Well, that reminds me about something... <g> Once upon a > time, an ordinary camera loaded with infra red film was > (still?) a good tool for computer hardware troubleshooting. > You just compare the photo with another one which taken when > the machine was in good condition. Chips/components that > shows different heat signature are the culprit and should > be replaced... as simple as that =) Didn't remember where > I read this, tough... Infra-red film does not show "heat signatures". Infra-red film is a special photographic emulsion having the property of being especially responsive to light in the near infra-red region of the electromagnetic spectrum. Infra-red film is useful for detecting non-visible light, not heat. Infra-red scanners, on the other hand, detect heat. Infra-red scanners do not directly incorporate photographic technology nor do they expose photographic film. Infra-red scanners can produce "heat signatures". Infra-red cameras are often confused with infra-red scanners. One of the main differences between an infra-red scanner and an infra-red camera is that an infra-red scanner does not require a light source in order to produce images. An infra-red camera requires the presence of a light source. The light does not have to be visible. An infra-red scanner does not require a light source of any kind, whether visible or invisible. Here is another interesting difference: An infra-red scanner can produce images of objects that are on the other side of opaque obstructions such as clouds and sod. An infra-red camera cannot. It is true that any ordinary camera can be loaded with infra-red film and used in such a manner so as to attain the results for which the film is capable. Been there, done that, and have snapshots of the invisible to prove it. All the best, Sam Heywood -- This mail sent by Arachne, www graphical browser for DOS -- Visit the Arachne DOS Browser Home Page, http://home.arachne.cz To unsubscribe from SURVPC send a message to [EMAIL PROTECTED] with unsubscribe SURVPC in the body of the message. Also, trim this footer from any quoted replies. More info can be found at; http://www.softcon.com/archives/SURVPC.html
