Mantis 5000 Especificaciones descargar pdf (Pagina 72)

problem. Impact of these factors can be minimized if you can localize the beam to

the target area of the sample using the small spot kit so the beam just barely fits

over the edges of the mask.

Large sample reflectance measurements

When measuring large samples that cannot be accommodated within the sample

reflectance port cover, you will need to follow the steps below:

Prior to recording the scan, make sure that mirror M3 is located in the correct position.

To measure a sample::

1. Click the Setup button and set up instrument parameters as required by the application.

Select the %R ordinate scale. The Beam mode should be double.

2. Select the Zero/baseline correction or Zero x std ref correction radio button on the

Baseline tab.

3. Load a Spectralon standard at the reference port and a calibrated reflectance standard,

if available, at the sample reflectance port. If a calibrated standard is unavailable for

reflectance measurements, an uncalibrated Spectralon reflectance standard can be

substituted. Install the port covers over their respective ports.

4. Click the Baseline button.

5. At the 100%T scan prompt, select OK. The standard at the reflectance port serves as

the 100%R reference.

6. At the 0%T scan prompt block the sample beam at the transmission port or remove the

reflectance standard and use the reflectance port cover as a light trap.

7. Remove the reflectance port cover, the spring loaded sample holder, the sample shelf

and unscrew the dovetail using a 3mm hex driver.

8. Position and secure your sample up against the reflectance port and start you

reflectance measurement.

The recorded baseline correction will be effective until replaced by a follow-up baseline

scan.

Note

If you have adequate control over the room lighting, it is recommended that you

run your 0%T scan without the reflectance port cover in place. In this configuration

the room itself becomes the light trap.

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Mantis 5000 Especificaciones Pagina 72