Capillary interferometry detects minute samples

Bornhop, D.J.; Houlne, M.P.; Kenmore, C.K.; Hankins, J.
October 1996
Laser Focus World;Oct96, Vol. 32 Issue 10, p83
Describes an optical backscatter configuration that is being used at Texas Tech University that overcomes some of the limitations found in on-capillary analysis schemes. Description of the microinterferometer backscatter detector; Why researchers are motivated to seek out new detection techniques; How the system was demonstrated.


Related Articles

  • A sensitive dispersion interferometer with high temporal resolution for electron density measurements. Licht, Valentin; Bluhm, Hansjoachim // Review of Scientific Instruments;Jul2000, Vol. 71 Issue 7 

    A dispersion interferometer with a sensitivity of up to 10[sup -4] fringe shifts and a time resolution of about 1 ns was developed. This time resolution exceeds previous systems by three orders. The operation of the dispersion interferometer and its characteristic properties are discussed and...

  • Test of an 18-m-long suspended modecleaner cavity. Skeldon, K.D.; Strain, K.A.; Grant, A.I.; Hough, J. // Review of Scientific Instruments;Jul96, Vol. 67 Issue 7, p2443 

    Describes a prototype modecleaner cavity with an optical path length of 18 meters and containing four suspended mirrors. Beam geometry noise in interferometers; Modecleaner filter for beam geometry noise; Design of a prototype suspended modecleaners; Performance of the prototype modecleaner.

  • Microinterferometer for the hard x-ray range. Snigirev, A. A.; Suvorov, A. Yu. // Review of Scientific Instruments;Jan1992, Vol. 63 Issue 1, p1204 

    The properties of a multibolck microinterferometer (MI) treated as a collimating optic element have been theoretically analyzed. It is shown that under certain conditions the MI rocking curve gets much narrower compared with that of a single crystal. The numerical calculations of the rocking...

  • Signal averaging with a stabilized dual beam Mach Zehnder interferometer: Monitoring changes in gas density. Tardy, D. C. // Review of Scientific Instruments;Mar93, Vol. 64 Issue 3, p623 

    A traditional Mach Zehnder interferometer has been fitted with a feedback loop that maintains a constant and known phase difference between the two optical beams. This stabilization is necessary so that signal averaging will not distort the signal. To increase sensitivity for small phase shifts...

  • A multiple white light interferometer. Raz, Eli // Review of Scientific Instruments;Oct96, Vol. 67 Issue 10, p3416 

    Discusses the development of a multiple interferometer using the short coherence length of white light. Ability of the system to count the number of light reflections between two parallel mirrors; Proportion of the shift in fringe position resulting from differences in the optical thickness to...

  • An optical interferometer for gas bubble measurements. Gelmetti, Andrea; Bellini, Tommaso; Lago, Paolo; Corti, Mario // Review of Scientific Instruments;Oct96, Vol. 67 Issue 10, p3564 

    Describes a compact and stable interferometer for the measurement of the radius of a gas bubble in a liquid. Experimental configuration; Different techniques in performing the automatic determination of the bubble radius from the observed fringe profile.

  • Cole Parmer launches 7th annual catalog.  // BioSpectrum;Aug2013, Vol. 11 Issue 8, p78 

    The article reviews the seventh annual catalog from industrial and scientific instrument distributor Cole Parmer in India.

  • A differential interferometer for force microscopy. Schönenberger, C.; Alvarado, S. F. // Review of Scientific Instruments;Oct89, Vol. 60 Issue 10, p3131 

    We present a polarizing optical interferometer especially developed for force microscopy. The deflections of the force-sensing cantilever are measured by means of the phase shift of two orthogonally polarized light beams, both reflected off the cantilever. This arrangement minimizes...

  • Using a fast lens to collect the signal in a VISAR system. Sweatt, William C.; Crump, O. B. // Review of Scientific Instruments;Dec1991, Vol. 62 Issue 12, p2946 

    VISAR (velocity interferometer system for any reflector) systems are used to measure the Doppler shift of a backscattered laser beam incident on a target, from whence the target's velocity can be calculated. In the past, slow lenses (F/4 or slower) have been used to collect the scattered light....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics