No abstract

No abstract

No abstract

No abstract

Imaging spectroscopy', a useful tool for modern spectroscopic studies can embed both spatial and spectral information to a set of images and derive the spectra from that. Such techniques are implemented to diversified fields like space observation and laboratory studies of solid materials.The present article intends to highlight the less noticed but significant fact that today's imaging spectroscopy in physical science originates from 'hyperspectral remote sensing', a technique for earth science that acquired maturity during the last three decades. It introduces several applications of spectral imaging for terrestrial and extra-terrestrial objects and anticipates some future trends in this technique. Implementation of imaging spectroscopy to atomic and molecular physics is hoped to provide with an indication of future researches in this direction.

No abstract

No 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 crosschecked 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.