Plastic
Louvers
Specular Reflectance
Semi-Specular Reflectance 
Parabolic Louvers
The cellular nature of parabolic louvers physically blocks the passage of light at angles above the sheilding angle. The specular aspect of the finish on the curved vertical
surfaces reflect down at angles equal to or less than the shielding angle. When these louvers are viewed at angles beyond that shielding angle, they will have little of the brightness
associated with the light source. The amount of brightness depends directly upon the percent of specular reflectance from the finish.
The advantage of Parabolic Louvers is the high degree of controlled light distribution that they offer. This precise light control makes Parabolic Louvers ideal for areas
with moderate to high concentrations of computer terminals (CRTs). This control is dependent upon the shielding angle offered by the specific louver and degree of specularity of the
finish. Parabolic Louvers are the optimum choice for areas where visual comfort and controlled reflection off of vertical surfaces is critical.