[Pursuit Camera] CRT
Posted: 08 Feb 2023, 15:37
I took my CRT down from the attic and did some quick UFOs. I wanted to do close ups to better capture the motion sharpness of low persistence. Due to resolution and pixel structure reference image is not perfectly sharp like on LCDs, but it's good enough. CRT in question is Fujitsu Siemens 17P4, resolution 1200x900 @100Hz.
Try the test on your monitor and see how it compares:
https://www.testufo.com/ghosting#backgr ... &pursuit=1
3000 px/sec
2000 px/sec
1000 px/sec
Reference
MPRT
I used my custom pattern to measure persistence. Display's approximate persistence will be shown as perfectly joined vertical lines with no horizontal overlapping or separation. Test was done at 4000 px/sec. From the image we can see it's close to but below 0.5 ms. Maybe somewhere between 0.3-0.5 ms.
Image above is observable persistence, this is what is really happening (Dell P1130 @120Hz under photo diode).
source: https://youtu.be/Ya3c1Ni4B_U?t=918
Camera shutter at 1/50
Freeze frame technique
Try the test on your monitor and see how it compares:
https://www.testufo.com/ghosting#backgr ... &pursuit=1
3000 px/sec
2000 px/sec
1000 px/sec
Reference
MPRT
I used my custom pattern to measure persistence. Display's approximate persistence will be shown as perfectly joined vertical lines with no horizontal overlapping or separation. Test was done at 4000 px/sec. From the image we can see it's close to but below 0.5 ms. Maybe somewhere between 0.3-0.5 ms.
Image above is observable persistence, this is what is really happening (Dell P1130 @120Hz under photo diode).
source: https://youtu.be/Ya3c1Ni4B_U?t=918
Camera shutter at 1/50
Freeze frame technique