The WIND imaging interferometer (WINDII) was launched on the Upper Atmosphere Research Satellite (UARS) on September 12, 1991. This joint project, sponsored by the Canadian Space Agency and the French Centre National d'Etudes Spatiales, in collaboration with NASA, has the responsibility of measuring the global wind pattern at the top of the altitude range covered by UARS. WINDII measures wind, temperature, and emission rate over the altitude range 80 to 300 km by using the visible region airglow emission from these altitudes as a target and employing optical Doppler interferometry to measure the small wavelength shifts of the narrow atomic and molecular airglow emission lines induced by the bulk velocity of the atmosphere carrying the emitting species. The instrument used is an all‐glass field‐widened achromatically and thermally compensated phase‐stepping Michelson interferometer, along with a bare CCD detector that images the airglow limb through the interferometer. A sequence of phase‐stepped images is processed to derive the wind velocity for two orthogonal view directions, yielding the vector horizontal wind. The process of data analysis, including the inversion of apparent quantities to vertical profiles, is described.

The term behavioral and psychological symptoms of dementia (BPSD) encompasses a diverse cluster of behavioral disturbances, such as restlessness (Hope et al., 1994), aggression (Patel & Hope, 1992), and shouting (Cohen-Mansfield & Werner, 1997), and a variety of psychiatric symptoms, including delusions (Burns et al., 1990), hallucinations (Holroyd & Sheldon-Keller, 1995), depression (Greenwald et al., 1989), and anxiety (Ballard et al., 1996a). Such symptoms are extremely common in patients with dementia and have important associations with burden and depression in caregivers.

A resource efficient psychiatric liaison service can reduce neuroleptic drug use and reduce some aspects of health service utilization; but a more extensive intervention is probably required to improve the overall quality of care.

We propose a new type of arrayed waveguide grating (AWG) device that operates as a Fourier-transform (FT) spectrometer without the need of scanning elements. The large input aperture size typical of a FT spectrometer eliminates the requirement for a narrow single-mode input waveguide while still achieving high spectral resolution with a markedly increased light-gathering capability (etendue). An example of the device with a resolution of 0.07 nm (approximately 10 GHz) and designed for a silicon-on-insulator platform is presented. The calculated spectra show no noticeable deterioration for aperture widths as large as 40 microm, yielding more than a 50-fold increase in aperture size compared with conventional AWG or echelle grating based devices at the equivalent resolution.

Optical systems for correcting the axial chromatic aberration of the eye are studied theoretically. Compact (cemented) doublets or triplets for this cannot avoid introducing unwanted transverse color. A new airspaced system is described which avoids this problem. Experimental results confirmed that this lens performed well over a 14-deg field of view.