Quote:
Originally Posted by newday07
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. |
Given the testing methodology is for a light source
aimed at the "eye" from a distance of 200mm, it's going to be hard to argue that potential diffuse reflection from the surface of an ereader screen from that same light source is going to be an issue when the source involved has an 'exempt" rating. Do you often read with your eyes 2cm away from your screen? It seems a bit idiotic to demand testing of the assembled IR LED/phototransistor array when the IR LEDs are not considered a photobiological hazard when directly viewed?
Quote:
Originally Posted by newday07
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.
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Congratulations! You are now getting a clue—if you can't feel the heat, your eye is not going to be damaged by the IR. Your touchscreen is not in the same category as molten steel or glass when it comes to worrying about photobiological hazards.
Quote:
Originally Posted by newday07
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 I was wrong to get a product now outdated.
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A bit hard to comprehend what you are attempting to say. What "different reasons that we know".
As for buying an outdated product? The common and, sadly, very often correct quote about electronic devices is that if you can buy it, it is obsolete. My laptop doesn't have an AMD Threadripper or an Intel Core i9-7980XE CPU. Oh, horrors! OTOH, it still lets me run multiple virtual machines with decent performance.
I'd suggest stopping whinging about a non-existent hazard.
A few quotes come to mind:
“It is better to remain silent at the risk of being thought a fool, than to talk and remove all doubt of it.” — Maurie Switzer
“To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead, or endeavoring to convert an atheist by scripture.” — Thomas Paine
“Never argue with a fool, onlookers may not be able to tell the difference.” — Mark Twain