Photonics & Imaging

A two-stage predictive method was developed for lossless compression of calibrated hyperspectral imagery. The first prediction stage uses a conventional linear predictor intended to exploit spatial and/or spectral dependencies in the data. The compressor tabulates counts of the...

A polarization imaging apparatus has shown promise as a prototype of instruments for medical imaging with contrast greater than that achievable by use of non-polarized light. The underlying principles of design and operation are derived from observations that light interacts with tissue ultrastructures that affect...

A compact 640 × 480 17-micron infrared (IR) detector from ULIS, Veurey-Voroize, France, is designed for surveillance, enhanced night driving, and thermography applications. The detector’s 24 × 24 mm2 enables camera makers to gain increased resolution to 640 × 480 without requiring an increase in system size. It is lightweight...

AIST Innovations Experiments with holograms have led to a thin-film flat-plate lens that has a periodic (layered) structure and that is capable of a resolution of 100 nm or finer. The flat lens provides excellent image-forming characteristics by the incidence of light having a...

PseudoDiversity is a method of recovering the wavefront in a sparse- or segmented-aperture optical system typified by an interferometer or a telescope equipped with an adaptive primary mirror consisting of controllably slightly moveable segments. (PseudoDiversity should not be confused...