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Iris birefringence (polarization, visible and IR)

Infrared
22 replies to this topic

#21 dabateman

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Posted 25 January 2021 - 20:35

Interesting, just looked it up. My old LG G4 and G6 where polarized. But Samsung phones uses AM OLED displays and aren't polarized. I tested the leds off my S1 fascinate and the blue is 455nm, the green is 520nm and the red is in mid 600s. Just forgotten, will edit later
So using the Lee phone app on a Samsung and Tokyo 071 filter you get a pure blue. The 182 gives pure red. So you can use these to light up stuff.
Fun times.

#22 dabateman

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Posted 25 January 2021 - 20:39

Andy I have used my old S1 as a light source for my microscope. It works as 455nm led with lee filter app. The screen id very bright. My S8 is also bright when you red line it. There are also flashlight apps that really crank up the screen brightness.
I don't own anything Apple, so don't know how it compares.

#23 Andy Perrin

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Posted 25 January 2021 - 21:16

Dabateman, with the LED light on flashlight on my iPhone I could barely see it when held an inch from my eye without cranking the ISO up past 3200. This was at F16 to get decent depth of field. Photographing a person is not like photographing a microscope sample that will hold still.