Bruker IRscope II Installationsanleitung

Microscope: Basic Instructions

Note: microscope manual available on BB.

Log on to computer with university username and password.

Start OPUS and log on with password infrared.

Fill IR detector Dewar with liquid nitrogen (normally use the one on the left –

mid band detector). Fill it until it begins to spill out, and the red light under the

“snowflake” symbol (K in diagram below) goes off.

Checking the signal

On the microscope, press the “eye” button (F in diagram). This gives a small

spot (if you don’t see it, you probably need to increase the intensity using the

wheel below the stage - I in diagram). Focus it onto a mirror or, preferably, a

less reflective bit of metal. Use the focus knob (on the right, at the back) to

obtain a small spot. Now look through the binoculars and get a focused

image, using the same knob.

Press the “wave” button, on the left.

In Opus, select Measure Setup Measurement Parameters

You can load a previous set of parameters by clicking Load (there is a file

called Peter Basic Parameters in My Documents).

Go to Check signal (tab at top right).

You should get an interferogram somewhere around 70000. If you don’t see

one, check you are in reflectance mode (under Advanced). Also make sure

the detector is cold.

When you have the interferogram, click Save Peak Position then Save and

Exit.

Reflectance: Taking Spectra

Click on the “test-tube” (Advanced Data Collection). With the bit of metal still

in place, save a background by clicking on Background Single Channel. You

don’t see anything at this point, but wait for it to finish.

Put your sample in place and focus on the surface (having pressed the eye

button). Press the “wave” button (**don’t forget to do this!!**) and click on

Sample Single Channel.

What if you get a very “narrow” spectrum, and want to expand in y direction?

Click on “Scale Ordinate”:

Or there is a function under “Display” called “Maximize all”.

To save, use “Save File As”, and save in C:\Documents and

Settings\scsharip\My Documents\...............

To remove a spectrum from display, right click and Remove from display.

To change colour of spectra, go to LHS and click on “REFL” or “TR” button.

Spectra can be copied into Word using right click.

Transmittance: Taking Spectra

First of all change from reflectance mode to transmittance mode (press button

C in diagram). Turn on the Bosch TV –so you can see the round apertures.

Turn on the light. Make sure the light goes through the hole –move the stage

using the joystick.

To get a background, you have to focus on the “square” apertures. Insert

these using the 2 wheels at the back of the stage on the left. Focus using the

knob underneath the stage.

To finish: log out and turn down the visible light source.

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