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Displaying 51 - 66 of 66

A New Method to Measure the Distance Between Graduation Lines on Graduated Scales

January 1, 1994
Author(s)
William B. Penzes, Robert Allen, Michael W. Cresswell, L Linholm, E C. Teague
Line scales are used throughout industry for a variety of applications. The most common is the stage micrometer, a small graduated glass scale for the calibration of optical instruments such as microscopes. However, stage micrometers are generally not

Force Calibrations in the Nanonewton Regime

January 1, 1994
Author(s)
Lowell P. Howard, E C. Teague
An instrument is described which is shown capable of making preliminary measurements of nanonewton forces. A technique is described which allows absolute calibrations of small forces to be made in terms of electrical measurements.

Hertzian Contact Resonances

January 1, 1994
Author(s)
John A. Kramar, T Mcwaid, J Schneir, E C. Teague
The resonant frequency of a sphere in contact with a flat surface was measured as a function of loading force for contacting materials with different elastic moduli. Comparisons were made with predictions based on the Hertzian theory of elastic deformation

Scanning Tunneling Microscopy Applied to Optical Surfaces

January 1, 1986
Author(s)
Robert A. Dragoset, R Young, Howard P. Layer, S Mielczarek, E C. Teague, Robert Celotta
The technique of scanning tunneling microscopy has been applied to topographic mapping of two optical surfaces: a ruled grating replica and a diamond-turned gold mirror. We have demonstrated the ability of the scanning tunneling microscope to measure