scholarly journals High-contrast lead-free pair of soft glasses for large numerical aperture imaging bundles

2020 ◽  
Vol 10 (8) ◽  
pp. 1891
Author(s):  
Ryszard Stepien ◽  
Jaroslaw Cimek ◽  
Dariusz Pysz ◽  
Ireneusz Kujawa ◽  
Przemyslaw Golebiewski ◽  
...  
Keyword(s):  
Numerical Aperture ◽  
Lead Free ◽  
High Contrast ◽  
Soft Glasses ◽  
Free Pair

Experimental high numerical aperture focusing with high contrast gratings

2013 ◽  
Vol 38 (17) ◽  
pp. 3410 ◽  
Author(s):  
Annett B. Klemm ◽  
Daan Stellinga ◽  
Emiliano R. Martins ◽  
Liam Lewis ◽  
Guillaume Huyet ◽  
...  
Keyword(s):  
Numerical Aperture ◽  
High Contrast ◽  
High Numerical Aperture

scholarly journals Planar high-numerical-aperture low-loss focusing reflectors and lenses using subwavelength high contrast gratings

2010 ◽  
Vol 18 (12) ◽  
pp. 12606 ◽  
Author(s):  
Fanglu Lu ◽  
Forrest G. Sedgwick ◽  
Vadim Karagodsky ◽  
Christopher Chase ◽  
Connie J. Chang-Hasnain
Keyword(s):  
Numerical Aperture ◽  
High Contrast ◽  
Low Loss ◽  
High Numerical Aperture

Experimental high numerical aperture focusing with high contrast gratings: publisher’s note

2014 ◽  
Vol 39 (4) ◽  
pp. 825
Author(s):  
Annett B. Klemm ◽  
Daan Stellinga ◽  
Emiliano R. Martins ◽  
Liam Lewis ◽  
Guillaume Huyet ◽  
...  
Keyword(s):  
Numerical Aperture ◽  
High Contrast ◽  
High Numerical Aperture

Assessment of high-contrast G- and I-line resists using high-numerical-aperture exposure tools

1990 ◽  
Author(s):  
Alois Gutmann ◽  
Johann Binder ◽  
Guenther Czech ◽  
Juergen Karl ◽  
Leonhard Mader ◽  
...  
Keyword(s):  
Numerical Aperture ◽  
High Contrast ◽  
High Numerical Aperture

Video-Enhanced Microscopy--Better Visibility of Plant Cell Structures

1982 ◽  
Vol 40 ◽  
pp. 182-185
Author(s):  
N.S. Allen ◽  
R.D. Allen
Keyword(s):  
Diffraction Pattern ◽  
Theoretical Basis ◽  
Numerical Aperture ◽  
Gain Control ◽  
Control Unit ◽  
Camera Control ◽  
Variable Gain ◽  
Contrast Method ◽  
Fine Detail ◽  
Cell Structures

Various methods of video-enhanced microscopy combine TV cameras with light microscopes creating images with improved resolution, contrast and visibility of fine detail, which can be recorded rapidly and relatively inexpensively. The AVEC (Allen Video-enhanced Contrast) method avoids polarizing rectifiers, since the microscope is operated at retardations of λ/9- λ/4, where no anomaly is seen in the Airy diffraction pattern. The iris diaphram is opened fully to match the numerical aperture of the condenser to that of the objective. Under these conditions, no image can be realized either by eye or photographically. Yet the image becomes visible using the Hamamatsu C-1000-01 binary camera, if the camera control unit is equipped with variable gain control and an offset knob (which sets a clamp voltage of a D.C. restoration circuit). The theoretical basis for these improvements has been described.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Confocal laser microscopy of impregnated central nervous system tissue

1988 ◽  
Vol 46 ◽  
pp. 94-95
Author(s):  
J.N. Turner ◽  
M. Siemens ◽  
D. Szarowski ◽  
D.N. Collins
Keyword(s):  
Electron Microscopy ◽  
Central Nervous System ◽  
Nervous System ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Confocal Laser ◽  
High Contrast ◽  
Central Nervous System Tissue ◽  
Tissue Samples ◽  
Reflected Light

A classic preparation of central nervous system tissue (CNS) is the Golgi procedure popularized by Cajal. The method is partially specific as only a few cells are impregnated with silver chromate usualy after osmium post fixation. Samples are observable by light (LM) or electron microscopy (EM). However, the impregnation is often so dense that structures are masked in EM, and the osmium background may be undesirable in LM. Gold toning is used for a subtle but high contrast EM preparation, and osmium can be omitted for LM. We are investigating these preparations as part of a study to develop correlative LM and EM (particularly HVEM) methodologies in neurobiology. Confocal light microscopy is particularly useful as the impregnated cells have extensive three-dimensional structure in tissue samples from one to several hundred micrometers thick. Boyde has observed similar preparations in the tandem scanning reflected light microscope (TSRLM).

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