A set of transparent glasses with chemical formula xZnO+10CaO+10Sb2O3+(80-x)B2O3 (x = 0 to 20 with 5mol% stepwise) were synthesized via melt-fast quench method. The basic non-crystallinity of present glasses was determined with X-Ray diffraction (XRD) measurement. An appearance of the broad humps in the XRD spectra is the characteristic nature of the non-crystalline materials. The density based physical aspects of the glasses were measured and determined by Archemeds method. It was found to increase with the incorporation of modifier ZnO. The optical features of the glasses were analyzed with UV spectra. The cut-off edge from UVSpectra increased from 296nm to 374nm: Indirect band gap varied between 3.90eV to 3.23eV: direct band gap varied from 3.97eV to 3.32eV; The Urbach energy (ΔE) increased from 0.65eV to 0.90eV with an addition of ZnO content. The higher refractive index found for the present glasses ranged 2.10 to 2.30. The structural variations in the glass network were studied with the help of FT-IR & Raman studies. FT-IR results proved the existence of BO3, BO4, SbO3, SbO6, ZnO4 units and cationic vibrations. The Raman studies revealed different vibrational modes in the glass network. The higher refractive index of the studied glasses indicates the suitability for NLO applications.