We report a polymer-stabilized liquid crystal (LC) microlens array with a large dynamic range and fast response time. The top substrate has a planar indium-tin oxide (ITO) electrode, while the bottom substrate has two patterned ITO electrodes for generating a fringing field and uniform longitudinal field. The fringing field is utilized to create the desired gradient refractive index profile in ...

We propose a fly-eye-like imaging system for seeing objects embedded in scattering media. Objects are recovered from many speckled images observed by a digital camera through a microlens array. Each microlens in the array generates a speckle image of the object buried between two layers of chicken breast tissue. In the computer each image is Fourier transformed jointly with an image of the spec...

A novel real-time gray-scale photolithography technique for the fabrication of continuous microstructures that uses a LCD panel as a real-time gray-scale mask is presented. The principle of design of the technique is explained, and computer simulation results based on partially coherent imaging theory are given for the patterning of a microlens array and a zigzag grating. An experiment is set u...

Gravitational microlensing1 is a powerful technique for measuring the mass of isolated and faint or non-luminous objects in Milky Way2,3. In most cases, however, additional observations to photometric light curve are required measure accurately microlens. Long-baseline optical/infrared interferometry provides new efficient way deliver such independent constraints4–7, as demonstrated recently by...

We present limits on the lens flux of OGLE-2007-BLG-224 based MagAO imaging taken seven years after microlensing event. At time observations, should have been separated from source by 292 mas. However, no new sources are detected with MagAO. place an upper limit H > 20.57. This measurement supports conclusion Gould et al. that in this event be a brown dwarf. is first test prediction terrestrial...

In this paper we will report on the optical performances of submicron planar lensless pixels arranged in the 2 × 2 Bayer cell configuration, the basic element of CMOS colour image sensors. The 2D microlens array placed in front of each pixel in commercial devices has been replaced by a 2D array of submicron holes realised on a thin metal film. Each pixel has been designed to present a lightpipe...

The interest in dynamically tuning light has attracted great attention to the fabrication of tunable microlens arrays. Here we discuss the fabrication and characterization of a simple, robust, yet tunable microfluidic optical device with integrated microlens array. The microfuidic device with desired channel structure was micromachined on a polycarbonate plate with a resolution up to 100 μm, fo...

The 3D-cascade-microlens optofluidic chip (3DCMOC) functions as a simple-to-fabricate and sensitivity-adjustable refractometer.