I am starting to investigate flicker at the individual pixel level, with an eye towards flicker caused by pixel inversion. My hypothesis is that there is something about the way that pixels in some panels flicker that gives me headaches, similar to how PWM gives me headaches.
I have the homemade PWM detector described by @KM in this post, and that's been extremely useful for detecting PWM and other large-scale flicker, but I want to look at light fluctuation in individual pixels, and what I have isn't sensitive enough to do that.
I would make the screen completely black except for one subpixel (e.g., have one pixel that's light green). When I do that on my laptop I can see the single pixel with my naked eye, so presumably an amplified photodetector could pick it up as well. I might need to go into a closet to eliminate all other sources of light.
I was thinking about purchasing the PDA36A2 or PDA100A2 from ThorLabs.
I was thinking that the PDA36A2 would work better due to the smaller surface area of its photoreceptor, but I’d love to hear any advice that anyone has. About any of it, really. The concept, other approaches, other vendors, etc.