Cooled infrared filters and dichroics for the James Webb Space Telescope Mid-Infrared Instrument

The cooled infrared filters and dichroic beam splitters manufactured for the Mid-Infrared Instrument are key optical components for the selection and isolation of wavelengths in the study of astrophysical properties of stars, galaxies, and other planetary objects. We describe the spectral design and manufacture of the precision cooled filter coatings for the spectrometer (7 K) and imager (9 K). Details of the design methods used to achieve the spectral requirements, selection of thin film materials, deposition technique, and testing are presented together with the optical layout of the instrument. (C) 2008 Optical Society of America.

A.P. Watt and the marketing of 'Ian Maclaren'

This article examines the role of the literary agent A.P. Watt in the successful marketing and global dissemination of the work of the popular Scottish writer 'Ian Maclaren' (Rev. John Watson). Based on extensive archival research, it analyses the magazines and periodicals which published his work in Britain and America and demonstrates the continued impact of his writing in the Scottish media in the twentieth century.