Spectroscopic reflectometer is a low cost, optical solution for characterizing thin film thickness and their optical properties. Angstrom Sun Technologies Inc delivers modular like tools to customers for their current applications and possible furture application with added /extended wavelength range. Model SR500 is wavelength range extension for SR100 (which covers 250 to 1100nm wavelength range) to 1700nm. Wavelength range coverage is highly application oriented. For example, in telecommunication application, all bands (O bands: 1260-1360nm; E band in 1360-1460nm; S band in 1460-1530nm, C band in 1530 -1560nm, L band 1565-1625nm, U band in 1625 -1675nm) are in near infrared wavelength range. To evaluate components's performance, like antireflection coating's behavior in laser cavity, it is necessary to have such wavelength range covered . In photovoltaic area, many newly developed functions films/coating are absorbing in visible range, like Copper indium gallium (di)selenide (CIGS), it is only possible to measure their thickness in transparent wavelength range which is also in the NIR range.