Photography. Dimensions of glass plates

2021 ◽  
Keyword(s):  
Glass Plates

scholarly journals Parametric Studies of a Mercury-Free DBD Lamp

Plasma ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 82-93
Author(s):  
Bruno Caillier ◽  
Laurent Therese ◽  
Philippe Belenguer ◽  
Philippe Guillot
Keyword(s):  
Indium Tin Oxide ◽  
High Efficiency ◽  
Barrier Discharge ◽  
Necessary Conditions ◽  
Electrical Signal ◽  
Major Interest ◽  
Xenon Mixture ◽  
Parametric Studies ◽  
Glass Plates ◽  
Alternative Solutions

Mercury discharge lamps are often used because of their high efficiency; however, the usage of mercury lamps will be restricted or forbidden for safety and environmental purposes. Finding alternative solutions to suppress mercury is of major interest. The aim of this work is to increase the luminous efficacy of a commercial-free mercury flat dielectric barrier discharge lamp (Planilum, St Gobain) in order to reach the necessary conditions for the lamp to be used as a daily lighting source. The lamp is made of two glass plates separated by a gap of 2 mm. The gap is filled by a neon xenon mixture. The external electrodes made of transparent ITO (indium tin oxide) are deposited on the lamp glass plates. The electrical signal applied to the electrodes generates a UV-emitting plasma inside the gap. Phosphors deposited on the glass allow the production of visible light. The original electrode geometry is plane-to-plane; this induces filamentary discharges. We show that changing the plane-to-plane geometry to a coplanar geometry allows the plasma to spread all over the electrode surface, and we can reach twice the efficacy of the lamp (32 lm/W) as compared to the original value. Using this new electrode geometrical configuration and changing the electrical signal from sinusoidal to a pulsed signal greatly improves the visual uniformity of the emitted light all over the lamp. Electrical and optical parametric measurements were performed to study the lamp characteristics. We show that it is possible to develop a free mercury lamp with an efficacy compatible with lighting purposes.

Method of measuring the refractive index of glass plates

1990 ◽  
Vol 33 (8) ◽  
pp. 803-808 ◽  
Author(s):  
Yu. V. Mishchenko
Keyword(s):  
Refractive Index ◽  
Glass Plates

GHOST IMAGING WITH INTENSE CORRELATED LIGHT

2007 ◽  
Vol 05 (01n02) ◽  
pp. 33-36 ◽  
Author(s):  
IVO PIETRO DEGIOVANNI ◽  
STEFANIA CASTELLETTO ◽  
EMILIANO PUDDU ◽  
ALESSANDRA ANDREONI ◽  
MARIA BONDANI
Keyword(s):  
Laser Beam ◽  
Thermal Field ◽  
Ground Glass ◽  
Ghost Imaging ◽  
Imaging Experiment ◽  
Seed Field ◽  
Glass Plates

We present a new ghost-imaging experiment that is realized by exploiting two intense correlated beams. The beams involved are signal and idler of a seeded parametric downconversion. The peculiarity of this scheme is that the seed field is an intense pseudo-thermal field generated by passing a laser beam through two rotating ground glass plates.

scholarly journals Calculation of the Arc Velocity Along the Polluted Surface of Short Glass Plates Considering the Air Effect

Energies ◽  
2012 ◽  
Vol 5 (3) ◽  
pp. 815-834 ◽  
Author(s):  
Wenxia Sima ◽  
Fusheng Guo ◽  
Qing Yang ◽  
Tao Yuan
Keyword(s):  
Glass Plates ◽  
Air Effect ◽  
Short Glass

Adhesives for Holding Mites to Glass Plates

1962 ◽  
Vol 55 (4) ◽  
pp. 570-571 ◽  
Author(s):  
Merrill L. Cleveland
Keyword(s):  
Glass Plates

Multi-Beam Laser Plotter For Glass Plates

1989 ◽  
Author(s):  
Akira Kuwabara ◽  
Koji Ozaki ◽  
Takumi Yoshida
Keyword(s):  
Beam Laser ◽  
Glass Plates

scholarly journals Transparent silver and other metallic films

1908 ◽  
Vol 81 (548) ◽  
pp. 301-310 ◽  
Keyword(s):  
White Light ◽  
Electric Resistivity ◽  
Metallic Film ◽  
Moderate Temperature ◽  
Metallic Films ◽  
Remarkable Change ◽  
Simple Method ◽  
Glass Plates ◽  
Cold Gas

It is well known that when thin leaves of gold or silver are mounted upon glass and heated to a temperature which is well below a red heat, a remarkable change of properties takes place, whereby the continuity of the metallic film is destroyed. The result is that white light is now freely transmitted, reflection is correspondingly diminished, while the electric resistivity is enormously increased. A simple method of illustrating this extraordinary change is to mount a sheet of silver leaf between two clean lantern plates, clip them lightly together by means of wire paper fasteners or other suitable means, and then heat gradually to a temperature of not more than 500°C. This can be done con­veniently by placing the plates on a thin fire-brick in a cold gas muffle, and then raising the temperature to the desired point. The gas should now be turned off, and the glass plates allowed to cool slowly, so as to avoid cracking. They can then be bound with strips like an ordinary lantern plate, and a permanent example of transparent silver is obtained. It will be found that such a plate transmits the light of the electric lantern almost as readily as ordinary glass, and does not produce any change of colour. The great trans­parency of the film may be shown by placing the plate upon printing or writing, and photographing the characters through the plate. Every detail of the characters can be reproduced with remarkable clearness. At first sight it is perhaps difficult to conceive that so distinct an impression could be obtained through what was originally a perfectly opaque sheet of silver, and which has only been once heated to a moderate temperature.

scholarly journals Electroless Deposited Gold Nanoparticles on Glass Plates as Sensors for Measuring the Dielectric Constant of Solutions

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Y. Kobayashi ◽  
Y. Ishii
Keyword(s):  
Dielectric Constant ◽  
Au Nanoparticles ◽  
Glass Plate ◽  
Au Nanoparticle ◽  
Peak Wavelength ◽  
Nanoparticle Deposition ◽  
Metal Plating ◽  
Large Dielectric Constant ◽  
Electroless Metal Plating ◽  
Glass Plates

This work describes a method for the deposition of Au nanoparticles on glass plates (Au-glass). An electroless metal plating technique was extended to the Au nanoparticle deposition. The technique consisted of three steps that took place on the glass plate: (1) adsorption of Sn2+ ions, (2) deposition of metallic Ag nuclei generated by reducing Ag+ ions with Sn2+ ions on the Sn-adsorbed sites, and (3) deposition of Au nanoparticles by reducing Au+ ions on the Ag surface. TEM observation revealed that metallic Au nanoparticles with a size of  nm were formed on the glass surface. A surface plasmon resonance absorption peak was observed, and its peak wavelength redshifted by immersing the Au-glass into a solution with a large dielectric constant. The redshift corresponded qualitatively to the calculation by the Mie theory accompanying the Drude expression, which was based on the change of the dielectric constant of the solution. The obtained results indicated that the Au-glass functioned as a sensor for measuring the dielectric constant of the solution.

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