Quote:
Originally Posted by DNSB
If you want information on standards and safety testing methodologies for LEDs, check IEC 62471-2006 (Photobiological safety of lamps and lamp systems) for a standard based on an American developed standard in 2005 called ANSI/IESNA RP-27 which were extended to cover LED light sources.
One item to note is that under IEC 62471-2006 or ANSI/IESNA RP-27, if a device is determined to be potentially a photobiological hazard, it must display at least a warning sign (check a laser pointer for an example of such a warning).
A quick check of various web sites from LED manufacturers will yield an overabundance of information. One example being Eye Safety from OSRAM's site. Please note that they are discussing eye safety and exposure as if you were looking directly into the IR LEDs at a 200mm distance. For information on visible light LEDs used in Cree's products, see Eye Safety With LED Components. I picked these two samples since I was already familiar with OSRAM since the IR touch screen I disassembled used OSRAM LEDs and phototransistors and Cree since I owned a Cree flashlight. |
Thanks.
https://www.osram.com/os/products/in...010185000100b6 But, I was referring to tests made on the ereader screens directly.
Some people say there is no emission, others that the emission is 40mW for a single LED, but it depends on the exposure (time*Quantity). It seems odd that there are no data. For this I asked. We can say everything and nothing.
Quote:
Originally Posted by DNSB
If you check the studies on IR and cataracts, the causative effect is the heating of the lens by the IR. If you can't feel the heat, you are very unlikely to have any issues caused by the IR exposure.
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But is the Lens innervated? Can we feel warm? Even looking at the fire in the fireplace we do not feel warm in the eyes.
Anyway infrared screens have now been overcome by capacitive screens for different reasons that we know. I was wrong to get a product now outdated.