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Most digital camera sensors are sensitive to a small range of IR, as well as visible light.
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∙ 11y ago
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Ccd camera used to focuse the ir led?
why we use LED in a hidden CCD camera?
Is it possible to make your computer touchscreen with an ir camera?
The touch screen feature requires either a screen or a plate(digitizer) you put in front of the screen. Then the touch inputs can be received by the computer via USB(Serial in the old days).Some of the systems can use a camera or IR led's(early HP touch smart PCs) to see your finger location as well.
Which component can replace the infrared LED in any electronics circuit?
If a circuit requires an IR LED, it requires an IR LED, there is no replacement. If a circuit does not require an IR LED, there is no need to look for a replacement.
How do you use ir led?
IR LED will be having connecting leads same as ordinary LED. When ever we use IR LED, which works like a transmitter we have to connect a photo diode as a receiver (very near to IR LED). So as we know IR LED keeps on emitting IR radiations photo diode will keeps on receiving, it in a reflecting surface. In case if the surface not reflect IR radiation(Black surface obsorbs IR). the input to the photo diode becomes nil, and photo diode wont work and hence the circuit. inform.mayaprasad@gmail.com
Where can one purchase a CCTV IR camera?
You can buy these particular cameras on several websites, including Ebay. If you don't wish to make your purchase online, then you can go to Comcast and they can help you get one of these and even install it for you.
What does an IR Illuminator do?
An IR Illuminator is necessary to draw light when taking photos or videos with a camera. It illuminates with infrared technology and allows one to see beyond what they normally would without the light source.
What radiation is used for digital camera?
Infrared radiation (IR)
What is IR camera?
IR stands for infrared - the energy just below red light. Some of the digital camera sensors on satellites are sensitive to IR, and most consumer digital cameras are sensitive to IR to some extent, but have built-in filters to block it. These can be converted to IR by replacing the filter with a clear piece of glass. In the film era, there were special IR-sensitive films, that had to be handled very carefully.
How does an infra-red camera work?
Infrared (IR) photos are taken with normal cameras using infrared film. The difference is the film used, not the camera. IR film is sensitive to the IR spectrum of light, not the visible spectrum.
Where is the IR port situated on a computer?
Most computers don't have IR ports anymore, but older laptops usually had them on the side. Desktop computers had them on the front. They will be somewhere on the computer where you would expect them to be visible in a normal home setup, since IR transmitions require line-of-sight. So they won't be on the back of the computer or anything like that. The IR port will look like a dark redish area of smooth shiny plastic on the case. A cool trick for finding IR ports is to turn out all the lights and get a digital camera or video camera and you will be able to see a white light coming from the IR port. Most digital or video cameras can see infrared (IR) light, even though the human can not. -DJ Craig
Do you see a light when the LED diode in the reverse bias?
Not usually, unless you mean a LED. It depends of the kind of diodes. LEDs will emit light but not most regular diodes, though some may produce infrared light. In the case of LEDs, the answer is yes. When an electron crosses the PN junction and falls into a hole, it emits a photon. The frequency depends on the energy, which is determined by the forward bias voltage. That is why a red LED requires more voltage than an IR LED, and less than a green LED. So a regular diode with a forward drop of about 0.7V is emitting infrared (IR) light. However, most of the photons are reabsorbed in the semiconductor body or stopped by an opaque case. An LED is a special diode doped for a higher voltage and constructed to let as many of the photons out as possible, set in a reflector and usually with a lens cast into the plastic case. There are a few glass-cased diodes which emit a deep red light, that I observed in a few audio amps. They drop more than the typical silicon diode's 0.7V. But overall, you typically cannot see the light emitted in a rectifier diode due to the absorption of the case and the semiconductor itself, and the fact that it is usually infrared. You might try some experiments yourself by removing the IR blocking filter that is normally installed in webcams, or find an IR sensitive security camera. All CCDs (the light sensing element in a video camera, digital camera, or webcam) are sensitive to infrared, but most have had a filter added to block IR so as not to spoil your photos. Then get some glass cased silicon diodes, point contact will have more viewing space, and a 9V battery and a 220 ohm resistor to put in series to limit the current. This will give you about 36mA through the diode. Then point the camera at it and turn out the lights or put it in a light-tight box and look for a glow from the diode.
Where can reviews on camera ir be found?
IR camera reviews can be found online at websites such as Amazon and eBay as most things for sale have reviews underneath. You could also check out dedicated review websites such as DPReview and Imaging Resource.
