Mantis 5000 Spécifications télécharger pdf (Page 36)

Alignment

Occasionally, the requirement exists to conduct fine tune alignment of the beam inside

the integrating sphere. Use white light operation and observe the beam path adjustments

through the accessory cover opening.

To check white light alignment:

1. Alternatively block the beam at the reference and transmission entrance ports and

view the alignment through the opposite port.

2. Click the Windows Start button, then Programs, then Cary WinUV, and then Align.

For centre mount use, load the translucent paper into one of the centre mount sample

holders and load the entire assembly into the sphere. Block the reference beam with a

plate and remove the reference port plug. View the centre mount holder through the

reference port. Turn the adjustment screws of mirror M3 until the beam is centred on the

sample area but does not clip the edges of the transmission port. When finished remove

the blocking plate.

Variable Angle sample holders

A variable angle centre-mount sample holder enables the sample reflectance and

absorbance to be studied at various incidence angles of the sample beam. The variable

angle centre-mount sample holder uses a rotating dial to allow the user to quickly set the

desired incidence angle to the nearest 1°. Depending on the sample size and the

instrument beam characteristics, the user can perform measurements at beam incidence

angles ranging from 0 - 60°.

Clip and Jaw style centre mount sample holders

The clip and jaw type centre-mount sample holders fix the sample at the centre of the

integrating sphere at selectable incidence angles.

The clip style sample holder, shown in the figure below, uses a spring-loaded clip to hold

the sample. This is useful for measuring transflectance. The sample must be in a sheet

configuration and large enough to accommodate the entire sample beam.

The jaw style sample holder (shown in figure 31) is better for holding large, bulky

samples. The sample must be opaque or an absorbent backing must be applied. The

sample holder is designed for reflectance measurements of samples that do not transmit

light.This centre mount sample holder is not designed for transflectance measurements.

The jaws accommodate sample sizes up to 1.5" in length and width. A clean disc of

SRM-99O optical grade Spectralon material approximately 30 mm in diameter can be

used as a reflectance standard.

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Mantis 5000 Spécifications Page 36