The present invention provides an electronic assembly 400 and a method for its manufacture 800, 900, 1000 1200, 1400, 1500, 1600, 1700. A compact acousto-optical modulator is used to modulate a green laser beam used to produce the image. Discharge lamps La1 to Lan are connected to secondary windings Ns1 to Nsn of the inverter transformers TR1 to TRn. With this arrangement, the interferometer provides short optical pulses at its output.