Mantis 5000 Especificaciones descargar pdf (Pagina 51)

8. Block the reference and sample beam entrance ports to the integrating sphere and

configure the sample beam for white light operation.

9. Observe the beam profile as it strikes the aperture plate, adjust the height of the plate

so the rectangular apertures are centreed on the sample beam.

10. Remove the beam blocker from the sample beam path. Observe the reflectance port

from the open centre-mount port, mount a piece of translucent paper in the sample holder

against the reflectance port. Check that the images of the double apertures lie within the

perimeter of the sample reflectance port. Make slight adjustments to mirror M3 as

necessary. The double aperture device is aligned.

There are four aperture positions on the masking wheel each spaced at 90° intervals along

the perimeter. A dimple is drilled at the centre of the wheel to match the tiny centre pin

on the aperture plate. Both the aperture plate and masking wheel should be removed from

the accessory during reflectance and transmission measurements.

Note

If reflectance or transmission applications require use of the optional polarizer, the

base mount must be relocated to the polarizer position.

Polarizer/Depolarizer

A polarizer optic can be provided as an optional assembly to either of the DRA

accessories for conditioning the polarization of the sample beam. The polarizer is a Glan-

Taylor constructed device. Specifications of the optic is provided on the Help and Videos

CDROM in the Cary WinUV software package. The light reflecting off the Spectralon

walls is completely diffuse, so a depolarizing optic is never required for reflectance

measurements. It may be useful for transmission measurements on polarizing samples.

The following components accompany the polarizer attachment:

Base mount with attachment screws Lens holder Polarizer lens

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Mantis 5000 Especificaciones Pagina 51