Multiple silver layers on glass panes add functionality to architectural fronts. Low-E glass or solar protection is used all over the world to save costs for heating or cooling the house. Glass is a non-scattering product. So far in the laboratory a d:8° instrument with specular component included has been used to measure glass panes. Because of the non-scattering surface of the glass pane, just the small illumination which came from the gloss angle at -8° was a useful illumination for the measurement, all the other directions of illumination where not effective.GretagMacbeth developed a measurement geometry where the pane is illuminated with a specific angle and the measurement will be taken right on the other side, directly in specular. This ensures a non-contact measurement with a high distance variation to measure different thicknesses of panes without mechanical adjustments.
Two different geometries are available:
ERX54 (new model!)The glass will be illuminated under 15° and measured with -15°. This measurement gives the same readings like in the laboratory with a sphere geometry measurement (d:8°, SPCI).
ER56 PAThis instrument has 2 geometries +15°/-15° and +60°/-60°. The 15° measurement gives the same readings as in the laboratory with a sphere geometry measurement (d:8°, SPCI). To see the color change in different observer angles the 60° measurement gives useful information.
