TITLE:
Cellotape Birefringent Filter: Some New Demonstrations
AUTHORS:
Ayantika Khanra, Barun Raychaudhuri
KEYWORDS:
Cellotape, Birefringence, Lyot Filter
JOURNAL NAME:
Optics and Photonics Journal,
Vol.6 No.7,
July
7,
2016
ABSTRACT: An easy method is put forward to estimate the optical bandwidth and the
wavelength of maximum transmission of Lyot optical filter by measuring the
change in phase retardation of birefringent plates as function of thickness.
The objective is to demonstrate the experiment with common undergraduate
laboratory equipment and thereby provide with an educational aid. The filter is
fabricated with cellotape using its birefringence property. The accuracy of
measurement is cross-checked with precision spectroradiometric measurements.
Some simplification is suggested in the theoretical derivation of the
transmitted intensity and a possibility of realizing tunable filter by changing
the angle of incidence is indicated.