Abstract: A character generator for use in photocomposing comprises a fibre optic faceplate (23) of which the front face is polished and bevelled at its leading and trailing edges. On the rear surface of the faceplate is a mask which has an array of apertures each aperture encompassing a multiplicity of the fibres. Photoemissive diodes or other illuminators (25) are approximately aligned with the holes in the mask and are disposed for connection to terminals 22 on a printed circuit mounting. The generator is intended for use in the constitution of characters by selective illumination of elementary areas. The faceplate is intended to be in close proximity to a film or other radiation sensitive recording medium which is moved relative to the faceplate to build up lines of composition.

Abstract: A method of making an assembly comprising a support plate with an array of lenslets made from optically refractive material mounted thereon, the support plate being substantially optically transparent at least in the regions adjacent the lenses, the method including, in respect of each lenslet, the steps: positioning the lenslet on the plate with a quantity of adhesive therebetween, the adhesive being curable by electromagnetic radiation in a given wavelength range; and, after checking that the lenslet is in a required position relative to the support plate, applying electromagnetic radiation within said wavelength range to the adhesive through the lens and/or the plate to cure the adhesive and fix the lenslet to the plate. The checking step includes observing an image, formed by an optical system including the lenslet, of a reference mark and adjusting the position of the lenslet on the support plate until the observed image is exactly in a predetermined position in an image plane.