410 IAC 5-6.1-30
410 IAC 5-6.1-30 "Contrast ratio" defined
Cite as Ind. Admin. Code tit. 410, r. 5-6.1-30
Sec. 30. As used in this rule, "contrast ratio" means the illumination inside the area three (3) mm from the edge of the light field
(I1), divided by the illumination outside the area three (3) mm from the edge of the light field (I2). It is calculated using
the following equation:
Contrast ratio = I1/I2