An application for optical measurements using a rotating linearly polarized light source

1986 ◽  
Vol IM-35 (3) ◽  
pp. 349-353 ◽  
Author(s):  
H. Takahashi ◽  
C. Masuda ◽  
A. Ibaraki ◽  
K. Miyaji
Keyword(s):  
Light Source ◽  
Polarized Light ◽  
Optical Measurements ◽  
Linearly Polarized

Rotating linearly polarized light source

1982 ◽  
Vol 21 (3) ◽  
pp. 364 ◽  
Author(s):  
Joseph Shamir ◽  
Yeshaiahu Fainman
Keyword(s):  
Light Source ◽  
Polarized Light ◽  
Linearly Polarized

scholarly journals A Surface Polarization Survey of the Milky Way and the Zodiacal Light

1973 ◽  
Vol 52 ◽  
pp. 139-141 ◽  
Author(s):  
J. Staude ◽  
K. Wolf ◽  
Th. Schmidt
Keyword(s):  
South Africa ◽  
Circular Polarization ◽  
Light Source ◽  
Milky Way ◽  
Polarized Light ◽  
Zodiacal Light ◽  
Clockwise Rotation ◽  
Surface Polarization ◽  
Linearly Polarized ◽  
Error Of Measurement

An elliptical Surface polarimetry of the Night Sky has been carried out at the Boyden Observatory, South Africa. The Milky Way is linearly polarized by p = 1 to 2 % (Figure 1); 11 regions also show a circular polarized light contribution (Table I).The amounts of circular polarization near v ≈ 0.1 % or less, observed within the Zodiacal Light, are generally not exceeding twice the error of measurement: see Staude and Schmidt (1972). (v > 0 is defined by clockwise rotation, looking against the light source).

scholarly journals Table-top soft x-ray polarimetry setup with rotatable linearly polarized light source

2019 ◽  
Vol 5 (01) ◽  
pp. 1 ◽  
Author(s):  
Wenbin Li ◽  
Yujie Xing ◽  
Yue Yu ◽  
Mingwu Wen ◽  
Chun Xie ◽  
...  
Keyword(s):  
Light Source ◽  
Polarized Light ◽  
X Ray ◽  
Linearly Polarized

scholarly journals Metasurface of Combined Semicircular Rings with Orthogonal Slit Pairs for Generation of Dual Vector Beams

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1718
Author(s):  
Qian Kong ◽  
Manna Gu ◽  
Xiangyu Zeng ◽  
Rui Sun ◽  
Yuqin Zhang ◽  
...  
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Polarized Light ◽  
Orientation Angle ◽  
Fdtd Simulation ◽  
Dual Vector ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Potential Applications ◽  
Difference Time

Manipulation of multichannel vector beams (VBs) with metasurfaces is an important topic and holds potential applications in information technology. In this paper, we propose a novel metasurface for the generation of dual VBs, which is composed of orthogonal slit pairs arranged on multiple groups of combined semicircular rings (CSRs). A group of CSRs include a right-shifted set and a left-shifted set of semicircular rings, and each set of semicircular rings has two halves of circles with different radii, sharing the same shifted center. Under the illumination of linearly polarized light, the two shifted sets of semicircular rings generate the two VBs at the shifted center positions on the observation plane. The slit units of each set are designed with independent rotation order and initial orientation angle. By adjusting the linear polarization of illumination, both two VBs with their orders and polarization states are independently controlled simultaneously. The principle and design are demonstrated by the finite-difference time domain (FDTD) simulation. The work is of significance for miniatured devices of VB generators and for related applications.

scholarly journals Formation of half-period surface relief gratings in azobenzene containing polymer films

2020 ◽  
Vol 126 (9) ◽  
Author(s):  
Joachim Jelken ◽  
Carsten Henkel ◽  
Svetlana Santer
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Surface Relief ◽  
Incident Light ◽  
Glassy State ◽  
Polarized Light ◽  
Half Period ◽  
Polarization Distribution ◽  
Linearly Polarized ◽  
Set Up

Abstract We study the peculiar response of photo-sensitive polymer films irradiated with a certain type of interference pattern where one interfering beam is S-polarized, while the second one is P-polarized. The polymer film, although in a glassy state, deforms following the local polarization distribution of the incident light, and a surface relief grating (SRG) appears whose period is half the optical one. All other types of interference patterns result in the matching of both periods. The topographical response is triggered by the alignment of photo-responsive azobenzene containing polymer side chains orthogonal to the local electrical field, resulting in a bulk birefringence grating (BBG). We investigate the process of dual grating formation (SRG and BBG) in a polymer film utilizing a dedicated set-up that combines probe beam diffraction and atomic force microscopy (AFM) measurements, and permits acquiring in situ and in real-time information about changes in local topography and birefringence. We find that the SRG maxima appear at the positions of linearly polarized light (tilted by 45° relative to the grating vector), causing the formation of the half-period topography. This permits to inscribe symmetric and asymmetric topography gratings with sub-wavelength period, while changing only slightly the polarization of one of the interfering beams. We demonstrate an easy generation of sawtooth profiles (blazed gratings) with adjustable shape. With these results, we have taken a significant step in understanding the photo-induced deformation of azo-polymer films.

Study of orientational order of some nematogenic compounds by spectroscopy methods using linearly polarized light

2005 ◽  
Vol 744-747 ◽  
pp. 307-313 ◽  
Author(s):  
D. Bauman ◽  
E. Chrzumnicka ◽  
E. Mykowska ◽  
M. Szybowicz ◽  
N. Grzelczak
Keyword(s):  
Orientational Order ◽  
Polarized Light ◽  
Linearly Polarized

The 1992 Polarized Light Source

2002 ◽  
Author(s):  
R. Alley ◽  
M. Woods ◽  
M. Browne ◽  
J. Frisch ◽  
M. Zolotorev
Keyword(s):  
Light Source ◽  
Polarized Light
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