Metrological and Optical –Mechanical Study of a Band Pass Glass Filter Working as Photometric Filter

In the present work, glass filters were obtained from three different glass (systems) components, phosphate glass, borate glass and Lithium borate glass with different concentration of transition metals. To characterize these filters, the
mechanical properties of the known bond strength, the stability of the glass network, and rigidity of the prepared glass filter were measured.
Mechanical properties were investigated using ultrasonic by pulse echo technique using sound wave velocity measurements at 4MHz (both longitudinal and shear) at room temperature. The transmission measurements using precise spectrophotometer have been showed that, the three studied glass systems (components), could be used as band pass filter in visible region simulating V(λ) filter. It blocks radiation away from the Visible region (380-780) to better than 0.01%. A combination of a trap detector with the filters were used as precise V(λ) filtered trap detector. The system can be characterized to be used for photometric measurements. The uncertainty analysis indicates a relative expanded uncertainty for the illuminance measurements.
V(λ) filtering is more expensive, in this paper, using limited capabilities, and cheap materials, we got an optical filter close to the standard V(λ) filter. With increasing laboratory capabilities, we can improve the optical properties and that is what we are aiming for in the future.