Optical-diffraction screens containing large numbers of apertures

Optical-transform methods remain useful aids in determining the structures of polymers, and other disordered materials, from X-ray scattering data. Hitherto a major difficulty has been the preparation of diffracting screens which contain sufficient information to specify adequately the material being studied. The Optronics P-1500 Photowrite system overcomes this difficulty. The equipment is described briefly and two examples of its use in optical transform methods are given.