Labsphere RSA-PE-20 User Manual

AQ-00073-000, Rev. 7 11
System Description and Operation
The RSA-PE-20 accessory is specifically designed to measure the reflectance or transmittance of
solids, liquids, powders, or other small objects that can fit in the transmittance or reflectance
ports. Basic components of the accessory include the integrating sphere, transfer optics and
detector preamplification module. Although the RSA-PE-20 is a single beam construction, the
accessory is compatible with the double beam configuration of the Lambda Series spectrometers
and your UV Winlab software.
Integrating Sphere
The integrating sphere assembly, shown in Figure 7, is 50 mm in diameter and constructed of
Spectralon. Spectralon is the same material used on the reflectance standard supplied with the
accessory. Typical reflectance values for Spectralon are provided in Appendix B.
The RSA-PE-20 integrating sphere features two ports: a transmittance port where the beam
enters the sphere, and a sample reflectance port. The illustration in Figure 7 shows the accessory
integrating sphere along with the transfer optics and preamplification board. The silicon detector
is mounted directly to the preamp board underneath. Two Spectralon baffles inside the sphere
shield the detector sensor from direct illumination by the ports.
The sample holders, mounted either at the transmittance or sample reflectance port, clamp the
Sample Reflectance Port
Port Frame
Port Frame
Transmittance
Port
Preamp Board
Detector Baffles
Spectralon Sphere
Detector
Figure 7. Construction of the integrating sphere.

Labsphere RSA-PE-20 Specifications

General

Brand	Labsphere
Model	RSA-PE-20
Category	Laboratory Equipment
Language	English