Patent ID: 7668422

Claim:
An apparatus for multiplexing and/or demultiplexing optical signals having a plurality of wavelengths, the apparatus comprising: a multiplex body having first and second parallel surfaces between which light is reflected back and forth and coupled in or out in a wavelength-dependent manner; a first subassembly including a first optoelectronic transducer on a first side of a first substrate and an associated optical system having a first lens in a second side of the first substrate; and a second subassembly including a second optoelectronic transducer on a first side of a second substrate and an associated optical system having a second lens in a second side of the second substrate; and means for providing an angular orientation of the optical path of each subassembly with respect to the second surface of the multiplex body, wherein the means for providing the angular orientation comprises spacers, each spacer being arranged between an associated subassembly and the second surface of the multiplex body, wherein the spacers are connected to one another with a defined spacing and form a placement part that is placed onto the second surface of the multiplex body.