Question about phosphors

[earlyfilm]

Originally Posted by old_tv_nut

1) You mean increase the density of the blue filter (make it darker).

Yippes!

With hoof in mouth, I wrote "Density" when I thought "saturation", ie., to allow the blue filter to pass more non-blue light which is yellow light.

Actually more density would also work, but again it would be counterproductive in getting a brighter screen image.

Adding density to blue is exactly what a yellow filter would do. Block some blue light, but allow red and green to pass light mostly untouched.

Allowing the blue filter to pass some yellow will ever so slightly reduce the flicker withut hurting overall color saturation.

When the color wheel is there, you simply want to get more light on the screen.

I assume the use of "density" by a non-specialized-in-photography author may mean "saturation" as in the terms are sometimes used interchangably.

James