This study tested the predictions of the Speech Learning Model (SLM, Flege, 1988) on the case of native Japanese (NJ) speakers' perception and production of English /ɹ / and /l/. NJ speakers' degree of foreign accent, intelligibility of /ɹ -l/ productions, and ability to perceive natural speech /ɹ -l/ were assessed as a function of length of residency in North America, age of arrival in North A...

In this paper an alternative and simple technique to measure the complex transmittance of a liquid crystal spatial light modulator (LC-SLM) is presented. By means of this technique the user can measure the amplitude and phase modulation of any LC-SLM through a simple interferometric setup. Particularly, optical characterization of specimen Holoeye LC2002 is carried out and its amplitude and pha...

This is essentially an archival document that summarizes the results of several tests performed at the Draper Laboratory on extended-range straightness monitor systems during the GEM Muon Alignment R&D activity. Two systems are discussed; standard 3-point LED/Lens/Quad-cell Straight Line Monitors (SLM) with multi-LED blocks, and the Video Straightness Monitor (VSM). Included are measurements of...

An autostereoscopic head-tracked back projection display that uses an RGB laser illumination source and a fast light engine is described. Images are horizontally scanned columns controlled by a spatial light modulator that directs two or more images in the directions of the apposite viewers’ eyes.

We manipulate a Bose-Einstein condensate using the optical trap created by the diffraction of a laser beam on a fast ferro-electric liquid crystal spatial light modulator. The modulator acts as a phase grating which can generate arbitrary diffraction patterns and be rapidly reconfigured at rates up to 1 kHz to create smooth, time-varying optical potentials. The flexibility of the device is demo...

In today’s information technology infrastructures Service Level Management (SLM) is considered a vital discipline of IT Service Management. Only by having a framework for establishing a common understanding of services and the manner in which they are used and provided, can next generation IT infrastructures (e-Infrastuctures) maintain a sufficient “customer satisfaction” on a sustainable level...

Data files: Open the data file, most of the time in CZI format or ome.tiff and translate into TIF. The TIF file contains 32 channels of Uint16 in a sequence. They must be converted to a single file in the format “.B64”. Routines for the conversions are available in SimFCS. If the data from the SLM 880 were stored as ome.tiff, you can use these files but first they need to be converted into B64....

Reliable application of spatial light modulators (SLMs) as programmable diffractive optical elements requires a thorough calibration. In this paper, we propose a method for calibrating SLMs based on the evaluation of Fresnel images. Fresnel images generated by a binary phase diffraction grating consist of binary irradiance distributions whose visibility depends on the phase modulation. By displ...

Arbitrary complex-valued functions can be implemented as arrays of individually specified diffusers. For any diffuser, only average step height and vertical roughness are needed to control phase and amplitude. This modulation concept suggests potentially low-cost fabrication methods in which desired topographies are patterned by exposing photoresist with partially developed speckle patterns. An...

A rigorous analysis of ultrashort pulse shaping by the spectral filtering of dispersed frequency components is presented. Particular attention is directed toward the case of two liquid-crystal spatial light modulators used to provide programmable manipulation of both the phase and the amplitude profiles of the shaped waveform in the time domain. Different optical configurations are evaluated an...