The life cycle of every new generation of fire detectors is
shortened, following a general trend. Correspondingly, the
time available for design and realisation of a new
innovative product decreases. To illustrate this fact, we
consider an optical scattering smoke detector. An optical
scattering smoke detector has a labyrinth, which acts as a
light trap that reduces unwanted light. The efficiency of a
labyrinth critically depends on its geometry and the optical
parameters of its surfaces. Therefore, prototypes have to be
fabricated using the moulding tools employed later for
mass production of the detector’s plastic parts. In order to
optimise the labyrinth, several prototypes are usually
necessary, improved step by step. Every new prototype
calls for a modification of the very complex mould. As a
consequence, the process of optimisation is costly and time
consuming.