An interesting macro view of PM scan lines...

wweiss

Enlightened
Joined
Feb 3, 2017
Messages
702
Location
Weston, CT
Please stay with me on this. I'm getting to the PM effect, promise...

My pond has a green, floating Chlorella algae. I didn't know what type of "pond scum" this was until I rubber-banded a 17x loupe over an iPhone XR lens and imaged these small particles on various materials so as to see them better. I shot them on a black surface and then on the clear lens of a Manker E14II with 4 Nichia 219c's on a 120L level. Some PM was seen only at a higher camera angle...

20200808_181029.jpg

The pond scum

IMG_6720.jpg


The Chlorella @ 17x

NOPM.jpg

No PM from the Manker lens at this 45d angle.

PM.jpg


PM scan lines when the camera angle (>60d) was more vertical over the LEDs...


I thought it was unexpected and interesting that the PM of the Manker only caused 'interference' with the scan rate of the iPhone camera at a higher angle...
 

wweiss

Enlightened
Joined
Feb 3, 2017
Messages
702
Location
Weston, CT
Yes, sorry - I did mean PMM.
I get confused because I have three daughters and the prefix "PM " brings me up short and frightened at times...
 

knucklegary

Flashlight Enthusiast
Joined
Feb 11, 2017
Messages
4,124
Location
NorCal, Central Coast
Very cool considering the use of a jewelers eye loupe jerry rigged with rubber bands

With 219c's peering in background it looks like something from the Outer Limits :)
 
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