On 1 May 1991 a seminar was held at the National Physical Laboratory on the subject of microlens arrays. This would appear to have been the first such meeting to be held in Europe and the purpose of the present paper is to summarize European work that was presented there.
Michael C. Hutley,
"Microlens arrays in Europe", Proc. SPIE 1544, Miniature and Micro-Optics: Fabrication and System Applications, (1 November 1991); doi: 10.1117/12.49380; https://doi.org/10.1117/12.49380