Page 169 - Chalcogenide Glasses for Infrared Optics
P. 169

Unconventional Lens Fabrication, Aspheric Surfaces, and Kinos     145


                              Top mold, convex surface







                                  IR glass blank
                                                      Metal ring








                            Bottom mold, concave surface





                         Molded IR lens with attached metal ring
              FIGURE 6.13  Diagram of the metal ring procedure used to reduce the
              diffi culty in removing a molded lens from the mold.
































              FIGURE 6.14  Photograph of a molded 17-mm-diameter lens in metal ring.
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