OPTICAL SYSTEM WITH GUIDE RAIL

The invention relates to an optical system (100) comprising a plurality of optical sensors (111) and a plurality of lenses (121), each lens (121a) of the plurality of lenses (121) being intended to be arranged on the optical path (111b) of an optical sensor (111a) of the plurality of optical sensors (111), the optical system being characterised in that: * the plurality of optical sensors (111) is supported by an optical unit (110); * the plurality of lenses (121) is supported by a lens holder (120); and in that it comprises at least one guide rail configured to guide the lens holder (120) in translation relative to the optical unit (110) so as to allow the lens holder to be mounted with the optical unit.