scholarly journals Photonic-chip based free space beam shaping and steering for advanced optical microscopy application

OSA Continuum ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 359
Author(s):  
Marcel Lahrberg ◽  
Firehun Tsige Dullo ◽  
Balpreet Singh Ahluwalia
Keyword(s):  
Optical Microscopy ◽  
Free Space ◽  
Beam Shaping

scholarly journals Free-space beam shaping for precise control and conversion of modes in optical fiber

2015 ◽  
Vol 23 (22) ◽  
pp. 28531 ◽  
Author(s):  
Jeff Demas ◽  
Lars Rishøj ◽  
Siddharth Ramachandran
Keyword(s):  
Optical Fiber ◽  
Free Space ◽  
Beam Shaping ◽  
Precise Control

Fiber Mode Excitation via Free-Space Beam Shaping

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Yuhao Chen ◽  
Patrick Gregg ◽  
Siddharth Ramachandran
Keyword(s):  
Free Space ◽  
Beam Shaping ◽  
Mode Excitation ◽  
Fiber Mode

Mitigation of aberration in a beam-shaping telescope and optical inhomogeinity in a free-space optical path using an extended light source coupled to the telescope

2002 ◽  
Author(s):  
Vladimir G. Sidorovich ◽  
V. V. Ragulsky ◽  
Michael V. Vasil'ev ◽  
Aleksey A. Leshchev ◽  
Michael A. Sadovnikov
Keyword(s):  
Light Source ◽  
Free Space ◽  
Beam Shaping ◽  
Optical Path ◽  
Free Space Optical

scholarly journals Free-space beam shaping for precise control and conversion of modes in optical fiber: errata

2015 ◽  
Vol 23 (26) ◽  
pp. 33587
Author(s):  
Jeff Demas ◽  
Lars Rishøj ◽  
Siddharth Ramachandran
Keyword(s):  
Optical Fiber ◽  
Free Space ◽  
Beam Shaping ◽  
Precise Control

Dislocations, Ordering and Antiferromagnetic Domains in MnO

1970 ◽  
Vol 28 ◽  
pp. 522-523
Author(s):  
D. J. Barber ◽  
R. G. Evans
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
Optical Microscopy ◽  
Defect Chemistry ◽  
Magnetic Structures ◽  
Optically Transparent ◽  
Magnetic Features ◽  
Antiferromagnetic Domains

Manganese (II) oxide, MnO, in common with CoO, NiO and FeO, possesses the NaCl structure and shows antiferromagnetism below its Neel point, Tn∼ 122 K. However, the defect chemistry of the four oxides is different and the magnetic structures are not identical. The non-stoichiometry in MnO2 small (∼2%) and below the Tn the spins lie in (111) planes. Previous work reported observations of magnetic features in CoO and NiO. The aim of our work was to find explanations for certain resonance results on antiferromagnetic MnO.Foils of single crystal MnO were prepared from shaped discs by dissolution in a mixture of HCl and HNO3. Optical microscopy revealed that the etch-pitted foils contained cruciform-shaped precipitates, often thick and proud of the surface but red-colored when optically transparent (MnO is green). Electron diffraction and probe microanalysis indicated that the precipitates were Mn2O3, in contrast with recent findings of Co3O4 in CoO.

A method to measure pores and fissures in geologic materials under S.E.M. by digital image processing

1978 ◽  
Vol 36 (1) ◽  
pp. 212-213
Author(s):  
L. Montoto ◽  
M. Montoto ◽  
A. Bel-Lan
Keyword(s):  
Image Processing ◽  
Optical Microscopy ◽  
Digital Image Processing ◽  
Digital Image ◽  
Digital Processing ◽  
Free Surfaces ◽  
Geologic Materials ◽  
Automatic Information ◽  
Detector Output ◽  
Rock Specimens

INTRODUCTION.- The physical properties of rock masses are greatly influenced by their internal discontinuities, like pores and fissures. So, these need to be measured as a basis for interpretation. To avoid the basic difficulties of measurement under optical microscopy and analogic image systems, the authors use S.E.M. and multiband digital image processing. In S.E.M., analog signal processing has been used to further image enhancement (1), but automatic information extraction can be achieved by simple digital processing of S.E.M. images (2). The use of multiband image would overcome difficulties such as artifacts introduced by the relative positions of sample and detector or the typicals encountered in optical microscopy.DIGITAL IMAGE PROCESSING.- The studied rock specimens were in the form of flat deformation-free surfaces observed under a Phillips SEM model 500. The SEM detector output signal was recorded in picture form in b&w negatives and digitized using a Perkin Elmer 1010 MP flat microdensitometer.

Digital imaging: When should one take the plunge?

1996 ◽  
Vol 54 ◽  
pp. 602-603
Author(s):  
John F. Mansfield
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Optical Microscopy ◽  
Digital Imaging ◽  
Storage Devices ◽  
Major Benefit ◽  
Transmission Electron ◽  
New Instrument ◽  
Scanning Electron

The current imaging trend in optical microscopy, scanning electron microscopy (SEM) or transmission electron microscopy (TEM) is to record all data digitally. Most manufacturers currently market digital acquisition systems with their microscope packages. The advantages of digital acquisition include: almost instant viewing of the data as a high-quaity positive image (a major benefit when compared to TEM images recorded onto film, where one must wait until after the microscope session to develop the images); the ability to readily quantify features in the images and measure intensities; and extremely compact storage (removable 5.25” storage devices which now can hold up to several gigabytes of data).The problem for many researchers, however, is that they have perfectly serviceable microscopes that they routinely use that have no digital imaging capabilities with little hope of purchasing a new instrument.

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