scholarly journals Low crosstalk polarization-difference channeled imaging spectropolarimeter using double-Wollaston prism

2019 ◽  
Vol 27 (8) ◽  
pp. 11734 ◽  
Author(s):  
Qiwei Li ◽  
Fang Lu ◽  
Xiaobin Wang ◽  
Changjiang Zhu
Keyword(s):  
Polarization Difference ◽  
Wollaston Prism

Next Generation Laser Voltage Probing

2008 ◽  
Author(s):  
Yin S Ng ◽  
William Lo ◽  
Kenneth Wilsher
Keyword(s):  
Phase Modulation ◽  
Phase Locked Loop ◽  
Next Generation ◽  
Solid Immersion Lens ◽  
User Friendliness ◽  
New Developments ◽  
Polarization Difference ◽  
Previous Generation ◽  
Mode Locked Laser ◽  
Optical Laser

Abstract We present an overview of Ruby, the latest generation of backside optical laser voltage probing (LVP) tools [1, 2]. Carrying over from the previous generation of IDS2700 systems, Ruby is capable of measuring waveforms up to 15GHz at low core voltages 0.500V and below. Several new optical capabilities are incorporated; these include a solid immersion lens (SIL) for improved imaging resolution [3] and a polarization difference probing (PDP) optical platform [4] for phase modulation detection. New developments involve Jitter Mitigation, a scheme that allows measurements of jittery signals from circuits that are internally driven by the IC’s onboard Phase Locked Loop (PLL). Additional timing features include a Hardware Phase-Locked Loop (HWPLL) scheme for improved locking of the LVP’s Mode-Locked Laser (MLL) to the tester clock as well as a clockless scheme to improve the LVP’s usefulness and user friendliness. This paper presents these new capabilities and compares these with those of the previous generation of LVP systems [5, 6].

Static polarization-difference interference imaging spectrometer

2012 ◽  
Vol 37 (17) ◽  
pp. 3507 ◽  
Author(s):  
Tingkui Mu ◽  
Chunmin Zhang ◽  
Wenyi Ren ◽  
Chenling Jia
Keyword(s):  
Imaging Spectrometer ◽  
Polarization Difference ◽  
Static Polarization

scholarly journals Wollaston prism-like devices based on blazed dielectric subwavelength gratings

2005 ◽  
Vol 13 (25) ◽  
pp. 9941 ◽  
Author(s):  
Riad Haïdar ◽  
Grégory Vincent ◽  
Nicolas Guérineau ◽  
Stéphane Collin ◽  
Sabrina Velghe ◽  
...  
Keyword(s):  
Subwavelength Gratings ◽  
Wollaston Prism

Simultaneous Nomarski and fluorescence imaging during video microscopy of cells

1988 ◽  
Vol 255 (4) ◽  
pp. C566-C571 ◽  
Author(s):  
J. K. Foskett
Keyword(s):  
Fluorescence Imaging ◽  
Fluorescence Emission ◽  
Video Camera ◽  
Light Level ◽  
Optical Path ◽  
Transmitted Light ◽  
Low Light ◽  
Dichroic Mirror ◽  
Wollaston Prism ◽  
Side Port

A video microscope designed to allow low light level fluorescence imaging of cells during simultaneous high-resolution differential interference contrast (DIC) imaging, without the fluorescence light losses of 60-90% normally associated with this contrast-enhancement technique, is described. Transmitted light for DIC imaging, filtered at greater than 620 nm, passes through standard DIC optical components, (1/4 lambda-plate, polarizer, and Wollaston prism) before illuminating the cells. Transmitted light and fluorescence emission pass through a second Wollaston prism but not through the analyzer, which is repositioned more distally in the optical path. Prisms designed to reflect light out a side port of the microscope to a video camera have been replaced with a dichroic mirror. This mirror reflects fluorescence emission out the side port to a low light-sensitive video camera. The spectrally distinct transmitted light continues through the dichroic mirror to an overhead camera through a polarizer (analyzer), which completes the DIC optical path. The fluorescence and DIC images can be viewed simultaneously on side-by-side video monitors, examined sequentially by an image-processing computer, or examined simultaneously using a video splitter/inserter. The ability to image cells with high resolution simultaneously with low light level fluorescence imaging should find wide applicability whenever it is necessary or desirable to correlate fluorescence intensity or distribution with specific cell structure or function.

scholarly journals Polarization Profile Near the 4430 Band

1973 ◽  
Vol 52 ◽  
pp. 79-81
Author(s):  
K. Nandy ◽  
H. Seddon
Keyword(s):  
Fine Structure ◽  
Photographic Plate ◽  
Wavelength Dependence ◽  
Polarization Profile ◽  
Wollaston Prism ◽  
Royal Observatory ◽  
Instrumental Polarisation

It has been reported by several authors that the extinction profile near the wavelengths of unidentified diffuse features shows fine structure (Brück and Nandy, 1970; Walker, 1971; York, 1971; Bromage, 1972); the question arises whether these features also exhibit fine structure in wavelength dependence of polarisation. It was first suggested by Greenberg et al. (1970, 1971) that interstellar bands produced by grain impurities may be polarized differently from the neighbouring continuum. Similar conclusions were also derived by Wickramasinghe and Nandy (1971) and Kelly (1971). Our first attempt to derive a profile of polarization against wavelength across the 4430 Å band was reported earlier (Nandy and Seddon, 1970). In this method we have used a Wollaston prism at the Cassegrain focus of the 36″ Telescope of the Royal Observatory, Edinburgh to produce orthogonally polarised spectra on the photographic plate. The results for the star 55 Cyg (Figure 1) indicated a definite profile. It was felt than an extension of the programme to acquire further profiles and to establish instrumental polarisation to a greater accuracy was necessary.

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