Optical System Design, Imaging Systems, Fabrication, Instrumentation, Measurement, Metrology, Thin Films http://scitation.aip.org/ Optical System Design, Imaging Systems, Fabrication, Instrumentation, Measurement, Metrology, Thin Films Geometric superresolution using an optical rectangular mask http://link.aip.org/link/?JOE/51/013203/1&agg=rss Mohammad Sohail and Asloob A. Mudassar<br/> In the modern world, we need high-resolution images for many applications, but the resolution of the imaging system can be degraded due to many factors, mainly the optical and geometrical components. The resolution limit for the optical system is set by diffraction, called diffractive superresolutio ... [Opt. Eng. 51, 013203 (2012)] published Fri Feb 10, 2012. Passive shortwave infrared broadband and hyperspectral imaging in a maritime environment http://link.aip.org/link/?JOE/51/013202/1&agg=rss K. Peter Judd, Jonathan M. Nichols, J. Grant Howard, James R. Waterman, and Kenneth M. Vilardebo<br/> This work offers a comparison of broadband shortwave infrared, defined as the spectral band from 0.9 to 1.7 [mu]m, and hyperspectral shortwave infrared imagers in a marine environment under various daylight conditions. Both imagers are built around a Raytheon Vision Systems large format (1024 x 1280 ... [Opt. Eng. 51, 013202 (2012)] published Wed Feb 8, 2012. Practical design and evaluation methods of omnidirectional vision sensors http://link.aip.org/link/?JOE/51/013005/1&agg=rss Akira Ohte and Osamu Tsuzuki<br/> A practical omnidirectional vision sensor, consisting of a curved mirror, a mirror-supporting structure, and a megapixel digital imaging system, can view a field of 360 deg horizontally and 135 deg vertically. The authors theoretically analyzed and evaluated several curved mirrors, namely, a spheric ... [Opt. Eng. 51, 013005 (2012)] published Wed Feb 8, 2012. Terrestrial laser scanning used to detect asymmetries in boat hulls http://link.aip.org/link/?JOE/51/013605/1&agg=rss Javier Roca-Pardinas, Francisco Lopez-Alvarez, Celestino Ordonez, Agustin Menendez, and Antonio Bernardo-Sanchez<br/> We describe a methodology for identifying asymmetries in boat hull sections reconstructed from point clouds captured using a terrestrial laser scanner (TLS). A surface was first fit to the point cloud using a nonparametric regression method that permitted the construction of a continuous smooth surf ... [Opt. Eng. 51, 013605 (2012)] published Tue Feb 7, 2012. New achromatic quarter-wave combination of birefringent plates http://link.aip.org/link/?JOE/51/013001/1&agg=rss Arijit Saha, Kallol Bhattacharya, and Ajoy Kumar Chakraborty<br/> Phase retarders usually exhibit strong wavelength dependence. For this paper, the design and characteristics of an achromatic cascaded system of birefringent plates were studied. The combination of three retarders in a series had been previously proposed by Pancharatnam, and he discussed the possibi ... [Opt. Eng. 51, 013001 (2012)] published Tue Feb 7, 2012. Vertical differential interference contrast http://link.aip.org/link/?JOE/51/013204/1&agg=rss Michael Warber, Tobias Haist, Malte Hasler, and Wolfgang Osten<br/> We propose a new phase contrast filtering technique based on a combination of a focused and a defocused point-spread-function. This way, an axial shear is introduced in the imaging system. Compared to conventional differential interference contrast, an isotropic behavior is achieved. The lateral res ... [Opt. Eng. 51, 013204 (2012)] published Mon Feb 6, 2012. Total integrated scatter from surfaces with arbitrary roughness, correlation widths, and incident angles http://link.aip.org/link/?JOE/51/013402/1&agg=rss James E. Harvey, Sven Schroder, Narak Choi, and Angela Duparre<br/> Surface scatter effects from residual optical fabrication errors can severely degrade optical performance. The total integrated scatter (TIS) from a given mirror surface is determined by the ratio of the spatial frequency band-limited relevant root-mean-square surface roughness to the wavelength of ... [Opt. Eng. 51, 013402 (2012)] published Mon Feb 6, 2012. Design and demonstration of a tiled-grating frame http://link.aip.org/link/?JOE/51/013007/1&agg=rss Zhang Jun-wei, Chen Wei, Xie Na, Zhou Yi, Zhou Hai et al.<br/> Development of a phased-array-grating compressor is a crucial issue for high-energy ultrashort pulse petawatt lasers. To achieve tiled array gratings and increase stability of tiled-grating frames, a new tiled grating frame is designed. In the tiled-grating frame, an integrated support structure is ... [Opt. Eng. 51, 013007 (2012)] published Mon Feb 6, 2012. High thermal expansion optical component machined by ion beam figuring http://link.aip.org/link/?JOE/51/013401/1&agg=rss Xuhui Xie, Yu Hao, Lin Zhou, Yifan Dai, and Shengyi Li<br/> Ion beam figuring (IBF) Technology to fabricate optical materials with a high thermal expansion coefficient, such as BK7, we were aware that the thermal effect is a troublesome problem that generates high thermal stress. If the thermal stress is over the component mechanical stress limit, the compon ... [Opt. Eng. 51, 013401 (2012)] published Mon Feb 6, 2012. Photometric-based recovery of illuminant-free color images using a red-green-blue digital camera http://link.aip.org/link/?JOE/51/013201/1&agg=rss Juan Luis Nieves, Clara Plata, Eva M. Valero, and Javier Romero<br/> Albedo estimation has traditionally been used to make computational simulations of real objects under different conditions, but as yet no device is capable of measuring albedo directly. The aim of this work is to introduce a photometric-based color imaging framework that can estimate albedo and can ... [Opt. Eng. 51, 013201 (2012)] published Mon Feb 6, 2012. High-throughput and multislit imaging spectrograph for extended sources http://link.aip.org/link/?JOE/51/013003/1&agg=rss Supriya Chakrabarti, Olli-Pekka Jokiaho, Jeffrey Baumgardner, Timothy Cook, Jason Martel et al.<br/> We describe a high-throughput (5 x 10 cm sr) imaging spectrograph that uses an echelle grating operating at a high dispersion order (24 to 43) to observe extended sources such as atmospheric airglow and diffuse proton aurora at high spectral resolution (approximately 0.02 nm). Instead of using a tr ... [Opt. Eng. 51, 013003 (2012)] published Wed Feb 1, 2012. Application of the speckle technique for three-dimensional deformation measurement http://link.aip.org/link/?JOE/51/013604/1&agg=rss Zhi-Xin Chen, Jin Liang, Cheng Guo, and Hao Hu<br/> In order to obtain more comprehensive three-dimensional (3-D) deformation data, improve the flexibility and precision of 3-D deformation measurement, and describe the real-time displacement of various points in the measurement scope, we researched speckle methods in this field. First, we expounded b ... [Opt. Eng. 51, 013604 (2012)] published Wed Feb 1, 2012. Accuracy analysis of radial velocity and distance measurement based on the Doppler effect http://link.aip.org/link/?JOE/51/013602/1&agg=rss Mindaugas Jurevicius, Jonas Skeivalas, and Robertas Urbanavicius<br/> We present an accuracy analysis of noncontact measurement applied for the evaluation of radial velocity and distance of a moving object. The principle of velocity and distance measurement is based on the Doppler effect. Described here are the radial velocity and distance measurement principle, as we ... [Opt. Eng. 51, 013602 (2012)] published Wed Feb 1, 2012. Compact camera for three-dimensional profilometry incorporating a single MEMS mirror http://link.aip.org/link/?JOE/51/013601/1&agg=rss Toshitaka Wakayama and Toru Yoshizawa<br/> To overcome inherent problems with conventional three-dimensional profiling systems based on pattern-projection method, we propose incorporating a digital device, such as a single MEMS mirror in the projection optics. In this system, a projector is controlled to generate a projection pattern with an ... [Opt. Eng. 51, 013601 (2012)] published Wed Feb 1, 2012. Design and characterization of an infrared Alvarez lens http://link.aip.org/link/?JOE/51/013006/1&agg=rss Paul J. Smilie, Brian S. Dutterer, Jennifer L. Lineberger, Matthew A. Davies, and Thomas J. Suleski<br/> While Alvarez lens prototypes have recently been manufactured and tested for visible wavelengths, there is little discussion of these types of components for infrared applications in the published literature. We present and characterize a germanium Alvarez lens for infrared imaging. Mathematical ana ... [Opt. Eng. 51, 013006 (2012)] published Tue Jan 31, 2012. Optical design in illumination system of digital light processing projector using laser and gradient-index lens http://link.aip.org/link/?JOE/51/013004/1&agg=rss Dawei Rui, Zulun Lin, Kangcheng Qi, and Wenbin Chen<br/> A novel structure of illumination system based on laser sources and gradient-index (GRIN) lens arrays for single-plate digital light processing (DLP) projector is proposed. Under the evaluation of light collection efficiency and illumination uniformity, we designed two different architectures of GRI ... [Opt. Eng. 51, 013004 (2012)] published Fri Jan 20, 2012. Tunable interference contrast using a variable Wollaston prism http://link.aip.org/link/?JOE/51/013002/1&agg=rss Julia Craven-Jones, Michael W. Kudenov, and Eustace L. Dereniak<br/> A Fourier transform spectrometer (FTS) acquires interferogram data for spectral measurements. Conventional FTS instruments incorporate Michelson interferometers. However, limitations of the Michelson for imaging applications have produced interest in alternative interferometer configurations. Common ... [Opt. Eng. 51, 013002 (2012)] published Thu Jan 19, 2012. Spatiotemporal computed tomography of dynamic processes http://link.aip.org/link/?JOE/50/123201/1&agg=rss Anders Kaestner, Beat Munch, Pavel Trtik, and Les Butler<br/> Modern computed tomography (CT) equipment allowing fast 3-D imaging also makes it possible to monitor dynamic processes by 4-D imaging. Because the acquisition time of various 3-DCT systems is still in the range of at least milliseconds or even hours, depending on the detector system and the source, ... [Opt. Eng. 50, 123201 (2011)] published Mon Dec 5, 2011. Colony image acquisition system and segmentation algorithms http://link.aip.org/link/?JOE/50/123001/1&agg=rss Weixing Wang<br/> This paper presents a novel colony analysis system including an adjustable image acquisition subsystem and a wavelet-watershedbased image segmentation algorithm. An illumination box was constructedboth front lightning and back lightning illuminations can be chosen by users based on the properties of ... [Opt. Eng. 50, 123001 (2011)] published Tue Nov 29, 2011. Autoexposure for three-dimensional shape measurement using a digital-light-processing projector http://link.aip.org/link/?JOE/50/123603/1&agg=rss Laura Ekstrand and Song Zhang<br/> Automatically adapting the camera exposure time is crucial for industrial applications where minimum human intervention is usually desirable. However, it is very challenging to realize such a capability for a conventional fringe projection system where only a finite increment of the exposure time is ... [Opt. Eng. 50, 123603 (2011)] published Tue Nov 29, 2011. Viewpoint placement optimization for binocular three-dimensional trajectory measurement of translating and rotating particle swarms http://link.aip.org/link/?JOE/50/123602/1&agg=rss Qi Wang, Yihao Zhou, and Yan Qiu Chen<br/> Three-dimensional (3-D) tracking and trajectory measurement of group translating and rotating particles may greatly help applications in collective behavior study, motion measurement, etc. Binocular stereo methods are commonly used to track and measure 3-D trajectories of drifting particles. Neverth ... [Opt. Eng. 50, 123602 (2011)] published Wed Nov 23, 2011.