An optical technique for fast focusing applied to high-aperture microscopy

2007 ◽  
Author(s):  
Edward Botcherby ◽  
Rimas Juskaitis ◽  
Martin Booth ◽  
Tony Wilson
Keyword(s):  
Optical Technique

scholarly journals Shift a laser beam back and forth to exchange heat and work in thermodynamics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
John A. C. Albay ◽  
Zhi-Yi Zhou ◽  
Cheng-Hung Chang ◽  
Yonggun Jun
Keyword(s):  
Optical Feedback ◽  
Brownian Particle ◽  
Time Varying ◽  
Optical Technique ◽  
Work Related ◽  
Engine Efficiency ◽  
Confining Potential ◽  
Equipartition Theorem ◽  
Virtual Temperature ◽  
High Flexibility

AbstractAlthough the equivalence of heat and work has been unveiled since Joule’s ingenious experiment in 1845, they rarely originate from the same source in experiments. In this study, we theoretically and experimentally demonstrated how to use a high-precision optical feedback trap to combine the generation of virtual temperature and potential to simultaneously manipulate the heat and work of a small system. This idea was applied to a microscopic Stirling engine consisting of a Brownian particle under a time-varying confining potential and temperature. The experimental results justified the position and the velocity equipartition theorem, confirmed several theoretically predicted energetics, and revealed the engine efficiency as well as its trade-off relation with the output power. The small theory–experiment discrepancy and high flexibility of the swift change of the particle condition highlight the advantage of this optical technique and prove it to be an efficient way for exploring heat and work-related issues in the modern thermodynamics for small systems.

The study of dielectrophoresis of cells using the optical technique of measuring

1978 ◽  
Vol 6 (1-2) ◽  
pp. 29-68 ◽  
Author(s):  
V. M. Fomchenkov ◽  
B. K. Gavrilyuk
Keyword(s):  
Optical Technique

scholarly journals Electron bunch length monitors using spatially encoded electro-optical technique in an orthogonal configuration

2009 ◽  
Vol 95 (23) ◽  
pp. 231106 ◽  
Author(s):  
X. Yang ◽  
T. Tsang ◽  
T. Rao ◽  
J. B. Murphy ◽  
Y. Shen ◽  
...  
Keyword(s):  
Electron Bunch ◽  
Bunch Length ◽  
Optical Technique

scholarly journals Compact optical technique for streak camera calibration

2004 ◽  
Vol 75 (10) ◽  
pp. 3930-3933 ◽  
Author(s):  
Perry Bell ◽  
Roger Griffith ◽  
Karla Hagans ◽  
Richard Lerche ◽  
Curt Allen ◽  
...  
Keyword(s):  
Camera Calibration ◽  
Streak Camera ◽  
Optical Technique

Shock temperatures in fused silica measured by optical technique

1982 ◽  
Vol 53 (6) ◽  
pp. 4512-4514 ◽  
Author(s):  
H. Sugiura ◽  
K. Kondo ◽  
A. Sawaoka
Keyword(s):  
Fused Silica ◽  
Optical Technique

Properties of flocs produced by water treatment coagulants

2001 ◽  
Vol 44 (10) ◽  
pp. 231-236 ◽  
Author(s):  
J. Gregory ◽  
V. Dupont
Keyword(s):  
Test Procedure ◽  
Dynamic Monitoring ◽  
Optical Technique ◽  
Water And Wastewater Treatment ◽  
Aluminium Sulfate ◽  
Jar Test ◽  
Water And Wastewater ◽  
Clay Suspensions ◽  
Polyaluminium Chloride ◽  
Floc Breakage

Hydrolyzing coagulants are extensively used in water and wastewater treatment, often under conditions where hydroxide precipitation is important, giving “sweep flocculation”. Pre-hydrolyzed coagulants, such as polyaluminium chloride (PACl) are also widely used and have several advantages over traditional additives, such as aluminium sulfate. Their action is usually discussed in terms of cationic species and charge neutralization. However, precipitation may also be important and this aspect has not been considered in detail. The present work has compared the action of alum and three commercial PACl products on model clay suspensions. The conventional jar test procedure has been used, along with measurements of settled floc volume and dynamic monitoring of floc formation and break-up by an optical technique. The latter method gives very useful information on the nature of the flocs produced and their response to different shear conditions. It is clear from the results that the PACl products form larger and stronger flocs than alum. With all coagulants floc breakage appears to be essentially irreversible. Sediment volumes are slightly lower for flocs produced by PACl than by alum, but the value is proportional to the dosage in all cases.

An optical technique for bit and packet synchronization

1995 ◽  
Vol 7 (1) ◽  
pp. 123-125 ◽  
Author(s):  
P. Blixt ◽  
J.E. Bowers
Keyword(s):  
Optical Technique

ChemInform Abstract: DIFFERENTIAL REFLECTOMETRY. A NEW OPTICAL TECHNIQUE TO STUDY CORROSION PHENOMENA

1980 ◽  
Vol 11 (42) ◽  
Author(s):  
C. W. SHANLEY ◽  
R. E. HUMMEL ◽  
E. D. JUN. VERINK
Keyword(s):  
Optical Technique
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