Green Spectral Fllter (A) Blue Spectral Fliter (A) Red Spectral Filter (A) Yellow Spectral Filter(A) Transmittance=85% Transmittance =45% Transmlttance =9% Transmlttance 12% 2 400580 00 0505800 WAVELENGTH (Nanometers) WAVELENGTH (Nanometers) WAVELENGTH (Nanometers) WAVELENGTH (Nanometers) Figure 14:Spectrophotometerlc Absorbtion Curves for PASCO Colored Filters Polarizer,140 nm Retarder The polarizers and the retarder are mounted in round acrylic holders with degree scales.The shoulder on the back of the holder fits into the rectangular hole of the component holders,and the components are easily turned to vary the angle of polarization or the retarding axis. The indicator line on the ledge of the component holder indicates the angle. The polarizing arid retarding materials are mounted in the holders with the polarizing and retarding axes parallel (+2)to a line passing between the 0 and 180 graduations on the degree scale. The polarizing material is Polaroid Type HN-32.It is a neutral color linear polarizer having a total luminous transmittance of 32%,and an extinction transmittance of about 0.005%.The transmittance spectrum for this material is shown in Figure 15. 160 50 40 30 30 20 10 10% 20% 30% 40% 375 450 550 650 750 Angle of Incldence In Alr WAVELENGTH (um) Figure 15:Polar Transmittance Spectrum Figure 16:Retardance Versus Angle of Incidence15 Polarizer, 140 nm Retarder The polarizers and the retarder are mounted in round acrylic holders with degree scales. The shoulder on the back of the holder fits into the rectangular hole of the component holders, and the components are easily turned to vary the angle of polarization or the retarding axis. The indicator line on the ledge of the component holder indicates the angle. The polarizing arid retarding materials are mounted in the holders with the polarizing and retarding axes parallel (±2 0 ) to a line passing between the 00 and l800 graduations on the degree scale. The polarizing material is Polaroid Type HN-32. It is a neutral color linear polarizer having a total luminous transmittance of 32%, and an extinction transmittance of about 0.005%. The transmittance spectrum for this material is shown in Figure 15