The Optics and Electronics Laboratories began their operation in mid-2006 at the premises of IAASARS in Penteli. Both labs are equipped with all the necessary equipment (two optical tables with special isolator legs for removing vibrations, calibration lamps, laser equipment, etc.) in order to support the operation and maintenance of the 2.3m "Aristarchos" telescope. In particular, laboratory tests of scientific instruments which will be placed on the telescope, work that needs to be made before scientific instruments settle to the telescope and during their use when needed, measurements of the filters, CCD cameras and calibration lamps, installation of special computer programs to be used at the telescope or in specific instruments, design and manufacture of opto-electronic components for spectrometers and calibration systems in astronomical instruments. Also, making vacuum in CCD cameras using special pumps at regular intervals. In both labs we also perform, the design, manufacture and testing of new scientific instruments as well as the design and testing of steel sections supporting scientific instruments. Finally, we develop and upgrade operating systems for astronomical instruments.