نتایج جستجو برای: optical testing
تعداد نتایج: 598956 فیلتر نتایج به سال:
The Lunar Orbiter Laser Altimeter (LOLA), developed for the 2009 Lunar Reconnaissance Orbiter (LRO) mission, is designed to measure the Moon's topography via laser ranging. A description of the LOLA optical system and its measured optical performance during instrument-level and spacecraft-level integration and testing are presented.
Various optical configurations for Hubble Space Telescope simulators have been proposed, and some are being built for use as verification tools to characterize the performance of second-generation instruments during ground testing. We describe the Hubble Space Telescope, present an overview of three optical designs for simulators, and discuss the relative advantages and disadvantages of each co...
Electrostatically actuated Micro-Electro-MechanicalSystems (MEMS) based micromirror is a fundamental building block for a variety of optical network applications, such as optical wavelength-selective switching, add/drop multiplexing, and optical cross-connecting. The design, analysis and testing of a 2-Dimensional (2D) electrostatically actuated torsional MEMS micromirror is presented in this p...
With new carbon fiber technologies and other lightweight constructions in aircraft and automotive manufacturing, adapted examination designs and especially developed testing methods are necessary. Modern optical methods have attracted interest not only for laboratory investigations but also for applications on the factory floor because they can be sensitive, accurate, non-tactile and non-destru...
Our overall goal is to understand how photosynthetic and photoprotective pigments in benthic plants (primarily benthic microalgae) affect the optical properties (primarily spectral reflectance and fluorescence) of shallow benthic environments. The information gained will be used for the development and testing of rapid scanning optical techniques for detecting and assessing changes and specific...
The Mercury Laser Altimeter (MLA), developed for the 2004 MESSENGER mission to Mercury, is designed to measure the planet's topography by laser ranging. A description of the MLA optical system and its measured optical performance during instrument-level and spacecraft-level integration and testing are presented.
For an integrated free-space optical interconnection system we suggest the use of microprisms to achieve large coupling angles at low loss. Prisms were fabricated in photoresist and quartz glass by analog lithography. High-energy-beam-sensitive glass was used as the gray-tone mask. Optical testing of the prisms shows acceptable surface quality and high efficiency (95%).
A three-laboratory study was performed to evaluate conidium counting in a hematocytometer as a technique of inoculum preparation for susceptibility testing of Aspergillus spp. In addition, inocula were quantified by colony counting and optical density determination. The agreement and correlation coefficient between conidium and colony quantifications were 89.2% and 0.73 (P < 0.01). Correlations...
L-I-V Testing Basic Light intensity-Current-Voltage (L-I-V) testing is an I-V test with the addition of optical power measurements. This test is primarily used to sort laser diodes or weed out bad devices before they become part of an assembly. The device under test (DUT) is subjected to a current sweep while the forward voltage drop is recorded for each step in the sweep. Simultaneously, instr...
This report outlines mix-and-match of JEOL e-beam lithography and ASML stepper optical lithography. Optical gratings and waveguides are made using both machines. Systematic overlay testing is also conducted for both machines, which shows overlay offsets ranging from 400nm without process correction to 100nm with process correction per exposure.
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