Method for manufacture of optical devices

A method of fabricating optical sensing devices for detecting displacement of a part thereof comprising the steps of producing an assembly of optical sensing devices by bonding a multiplicity of optical devices to one surface of a relatively large transparent substrate so that the optical devices are accurately located relative to one another and to the substrate itself and securing the opposite surface of said substrate to one surface of another transparent optical element in parallel relationship by a resilient lattice spacer support means and then dividing the entire assembly into a multiplicity of individual unit parts each of which comprises an optical device bonded to one substrate unit and coupled to another substrate unit embodying an optical element, the coupling being provided by a divided part of the resilient lattice spacer support means which resiliently supports the two substrate units relative to one another in a cantilever fashion whereby relative movement between the two resiliently supported substrate units produces variations in the spacing between the optical device and the optical element and resulting in changes in the optical characteristics of the device which are sensed.