NewBie
*Retired*
I grabbed a few reflectors of various profiles and did some testing.
I found the shallow modified reflectors cause an issue with a distinctly colored ring when projected on a white wall.
I found that deeper reflectors, that come up tighter to the CREE XR-E have much less, if any tinted ring effect.
Then I reversed the situation to demonstrate where the rings are comming from.
The setup:
What you see is a flashlight in the path and angle of where I saw the maximum tinted ring effect.
Then I turn on the flashlight, and bring the paper in to block the direct light, so it has to hit just the reflector, and you then see where the light is comming from:
With deep reflectors of a narrow diameter, I don't see this, so it might be something useful to consider.
Here is another shot, which should show things a little better, it appears that on the shallower reflectors, there is an angle that hits the inside of ring wall, and then is reflected down upon the phosphor surface.
Another item to look at is the light cast out the side:
And another set of photos to look at:
When I get the production Seoul P4 parts, I'll try and get a similar set of examinations, so folks that want to fiddle with this stuff can see what is going on there.
I found the shallow modified reflectors cause an issue with a distinctly colored ring when projected on a white wall.
I found that deeper reflectors, that come up tighter to the CREE XR-E have much less, if any tinted ring effect.
Then I reversed the situation to demonstrate where the rings are comming from.
The setup:
What you see is a flashlight in the path and angle of where I saw the maximum tinted ring effect.
Then I turn on the flashlight, and bring the paper in to block the direct light, so it has to hit just the reflector, and you then see where the light is comming from:
With deep reflectors of a narrow diameter, I don't see this, so it might be something useful to consider.
Here is another shot, which should show things a little better, it appears that on the shallower reflectors, there is an angle that hits the inside of ring wall, and then is reflected down upon the phosphor surface.
Another item to look at is the light cast out the side:
And another set of photos to look at:
When I get the production Seoul P4 parts, I'll try and get a similar set of examinations, so folks that want to fiddle with this stuff can see what is going on there.
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