[visionlist] Low cost photometer/colorimeter

Jeff Mulligan jeffrey.b.mulligan at nasa.gov
Thu Mar 23 11:07:15 -05 2017

On 3/23/17 8:13 AM, Georgeson, Mark A wrote:
> Comment: since luminance is invariant with distance, it shouldn't 
> matter in principle what distance the meter is at.

insert "for extended sources"---------------------^

True enough for full-field displays, but maybe not for single pixels.

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