The concerns of these regulations are policing and privacy, but their language is photographic: visibility, film, reflection, light, transmittance.
The New Yorker(Jul 27, 2016)
White lights shoot various levels of transmittance through the table’s holes.
Forbes(Oct 20, 2014)
To enhance the light absorbed within a medium, both the reflectance and the transmittance of the medium must be minimized.
Nature(Dec 11, 2012)