  Optical reflectivity spectra were measured on cleaved surfaces of
La1-xSrxMnO3 single crystals (x=0.175, T_C=283 K) over a temperature range
10-295 K. The optical conductivity $sigma(\omega)$ shows, keeping
single-component nature, incoherent-to-coherent crossover with increase of
electrical conductivity. The $\sigma(\omega)$ spectrum of low-temperature
ferromagnetic-metallic phase (10 K) exhibits a pronounced Drude-like component
with large spectral weight, contrary to the previous result. The present result
indicates that the optical spectrum of the manganites is sensitive to condition
of sample surfaces.
