Spectral sensitometer for a photosensitive surface
The invention concerns a spectral sensitometer for a photosensitive surface. The sensitometer according to the invention comprises: i) a light-integrating waveguide (10) for receiving, guiding and integrating the monochromatic light from illumination means; ii) a plurality of optical fibres (12), the fibres of which are arranged so as to define a single entry face (11), the plurality of fibres being divided into a plurality of exit beams (13), each of the exit beams having a number of fibres which is chosen so as to produce a plurality of light beams, the respective intensities of which vary in a geometrical progression at a given rate; and iii) a light-integrating waveguide (16) associated with each of the exit beams, each of the waveguides (16) having a first end placed opposite the end face of the corresponding exit beam (13), the second end being placed opposite the photosensitive surface (17), so as to expose the photosensitive surface to the corresponding light beam. Application to the sensitometry of photographic films. <MATH>