Iris recognition is one of the non-contact biometric identification methods that are hygienic and highly accurate. involves using iris images obtained by a near-infrared (NIR) camera or visible light camera. A clear image can be when an NIR used, but it requires illuminator in addition to performed with built-in device which also has advantage obtaining three-channel containing color informatio...

This thesis reports the main results in photonic module integration using silicon, multilayer ceramic and plastic technologies. In order to implement high-performance photonic modules the accurate alignment between critical devices and components is very essential. Costefficient photonic modules in volume production can be achieved, when the alignment of devices and components is implemented pa...

IC 2144 is a small reflection nebula located in the zone of avoidance near the Galactic anticenter. It has been investigated here largely on the basis of Keck/HIRES optical spectroscopy (R ≈ 48,000) and a SpeX spectrogram of the near-IR (R = 2000) obtained at the NASA IRTF. The only star in the nebula that is obvious in the optical or near-IR is the peculiar emission-line object MWC 778 (V = 12...

This paper presents a passive bistatic radar (PBR) configuration using global navigation satellite system as an illuminator of opportunity for the rotor blade feature extraction helicopter. Aiming at strong fixed clutter in surveillance channel PBR, novel iteration elimination method-based singular-value decomposition approach is proposed. Instead range method used classic extended cancellation...

We present ultraviolet and visual spectropolarimetry of the interacting binary star b Lyrae, obtained with the Wisconsin Ultraviolet Photo-Polarimeter Experiment and the HPOL spectropolarimeter at Pine Blu† Observatory. Our observations span 3 years and cover the wavelength range from 1400 to 10500 Ó, with a resolution of 7.5È16 Detailed broadand narrowband spectropolarimetric analysis allows u...

Many techniques are used to monitor one or more of the phenomena involved in the crystallization process. One of the challenges in crystal growth monitoring is finding techniques that allow direct interpretation of the data. The present study used a low-cost system, composed of a commercial webcam and a simple white LED (Light Emitting Diode) illuminator, to follow the calcium carbonate crystal...

Strong fluorescent Fe line emission at 6.4 keV has been observed from the Sgr B2 giant molecular cloud located in the Galactic Center region. The large equivalent width of this line and the lack of an apparent illuminating nearby object indicate that a time-dependent source, currently in a low-activity state, is causing the fluorescent emission. It has been suggested that this illuminator is th...

We are investigating an optoelectronic imaging technique for localizing fluorescence probes in biologic specimens and experimental animals analyze the uptake, localization, and significance of these agents in biological structures. A prototype, digital optical imaging system consisting of a white light illuminator with an optical fiber light guide, a custom designed wavelength-selective filter ...

The phenomenon of colour constancy in human visual perception keeps surface colours constant, despite changes in their reflected light due to changing illumination. Although colour constancy has evolved under a constrained subset of illuminations, it is unknown whether its underlying mechanisms, thought to involve multiple components from retina to cortex, are optimised for particular environme...