A novel technique for imaging spectroscopy is introduced. The technique makes use of an optical imaging system with a segmented aperture and intensity detector array on the imaging plane. The point spread function (PSF) of such a system can be adjusted by modifying the path lengths from the subapertures to the image plane, and the shape of the resulting point spread function will vary as a func...

This paper presents a simulation method using the commercial light field camera Lytro, which allows simulation of various aperture shapes and noise characteristics. A modified shift-and-add algorithm is used to implement aperture shape simulation. Two example use cases, special bokeh effects generation and multiplexed light field acquisition analysis, are given to demonstrate the system. Compar...

We have developed a method of performing near-field fluorescence correlation spectroscopy via an array of planarized circular apertures of 50 nm diameter. This technique provides 1 μs and 60 nm resolution on proximal samples, including live cells, without incorporating a scanning probe or pulsed lasers or requiring penetration of the sample into the aperture. Millions of apertures are created i...

We describe the design and performance of an adaptive optics retinal imager that is optimized for use during dynamic correction for eye movements. The system incorporates a retinal tracker and stabilizer, a wide-field line scan scanning laser ophthalmoscope (SLO), and a high-resolution microelectromechanical-systems-based adaptive optics SLO. The detection system incorporates selection and posi...

To achieve high signal-to-noise ratios (SNR) while maintaining moderate sensor size, an architecture is proposed to combine several independent radar apertures into a coherently functioning unit. The proposed system utilizes several distinct apertures which are to be adaptively cohered based on observed target returns. Two operating modes are presented (in addition to each aperture operating as...

The discovery of extraordinary transmission through periodic aperture arrays has generated significant interest. Most studies have used circular apertures and attributed enhanced transmission to surface plasmon polariton (SPP) resonances and/or Rayleigh-Wood anomalies (RWA). Bowtie apertures concentrate light and have much longer cutoff wavelengths than circular apertures and can be designed to...

We discuss the signal-to-noise ratio of an intensity interferometry experiment for a highly asymmetric x-ray source using different aperture shapes in front of the photodetectors. It is argued that, under ideal conditions using noiseless detectors and electronics, the use of slitshaped apertures, whose widths are smaller but whose lengths are much greater than the transverse coherence widths of...

We present a microelectromechanical system (MEMS) based method for the resist-free patterning of nanostructures. Using a focused ion beam to customize larger MEMS machines, we fabricate apertures with features less than 50 nm in diameter on plates that can be moved with nanometer precision over an area greater than 20 × 20 μm(2). Depositing thermally evaporated gold atoms though the apertures w...