Design of Continuous and Quantized Amplitude Holograms by Generalized Projections

this paper we address the following problem: What distribution of amplitude a(x) is needed in the transmittance function of a pure-amplitude hologram or spatial light modulator to generate a far-field light intensity I(u)? Here, x is the displacement vector in the plane of the hologram, and u is the displacement vector in the Fourier, or image plane. We examine both continuous and quantized amplitude holograms. With the increasing interest in diffractive optics

Approach to the Tricyclic Core of the Tigliane–Daphnane Diterpenes. Concerning the Utility of Transannular Aldol Additions

Two transannular (TA) aldol reactions were used to assemble the tricyclic carbon skeleton found in the tigliane and daphnane classes of diterpene natural products