Optoelectronic modules, such as imaging cameras, proximity sensors, range cameras, structured-light/pattern generators, and image projectors, and methods for their manufacture, are disclosed. The optoelectronic modules exhibit particularly small dimensions. The optoelectronic modules include an optical assembly, an intermediate substrate, and a base substrate. The optical assembly includes a flange portion. An adhesive layer between the flange portion and the intermediate substrate, and an additional adhesive layer between the intermediate substrate and the base can be substantially non-transmissive to light and can resist dimensional changes dues to moisture absorption, for example.