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Flatbed Scanner

Instrumentation

Epson Perfection V700 PHOTO

Software

LaserSoft SilverFast SE6
Matlab
Origin Lab
Adobe photoshop

Operation

Optical resolution at 6400 dpi
Operates in both transmission and reflection mode

Main uses

Transmission and absorption data as a function of position in the plane of the sample.
The dual lens and high resolution allows it to be used as for microscopic imaging of large sample areas.

Example Project

Nickel thin film deposited by pulsed laser deposition on a curved transparent plastic substrate

(A)
(B)
(C)

An example of an image recorded of a nickel film deposited by pulsed laser deposition on a curved transparent plastic substrate is shown, (A). The image was recorded using a resolution of 150dpi and as a 24bit RGB image in tif file format. The image is imported into Matlab and converted into a matrix corresponding to the Green part of the RGB Matrix. A coloumn and row of data can be extracted and imported into a graphing package such as Origin, (d).

A calibration of the scanner is needed to turn the measured signal into a transmission value. For this a series of neutral density filters of known transmission are used to convert the signal from the scanner to transmission. This tranmission data can now be plotted as a function of position and in this specific case, angle, as the flexible substrate was curved during deposition around the source, (e). By using published refrative indices for the material of interest the transmission data for the film can be used to plot a thickness profile, (f).

(D)
(E)
(F)

Images provided by Tony Donnelly of the Laser and Plasma Applications Group