Abstract

The optical and spectral set-up, applied to the Transmission/ Absorption; Reflectance a Photo-Reflectance measurements, had been established and connected to computer by 12 bits ADC card and the programmed software Pascal [1,2,3]. In this paper, we have improved the optical and the electronic components, moreover, have employed the LABVIEW 5.1 RT software and the PCI 6024E card in order to control all the system automatically. Besides, the Photo Luminescence measurement is also supplemented to the set-up. As a result, this optical and spectral set-up includes all traditional optical measurements such as Transmission/ Absorption, Reflectance, Photo Luminescence and, specially, Photo-reflectance for studying the optical properties on the semiconductors such as the optical constants (T, α, R), internal optical traps and the surface states.