Pike Technologies Comprehensive Catalog of FTIR ... - Madatec
Pike Technologies Comprehensive Catalog of FTIR ... - Madatec
Pike Technologies Comprehensive Catalog of FTIR ... - Madatec
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P IKE T ECHNOLOGIES WWW. PIKETECH. COM 608-274-2721<br />
Absolute Reflectance Accessory –<br />
Measure Absolute Sample Reflectance<br />
F EATURES O F T HE A BSOLUTE<br />
R EFLECTANCE A CCESSORY<br />
• For the measurement <strong>of</strong> absolute reflectance <strong>of</strong> optical surfaces,<br />
windows and metallic surfaces<br />
• Performance evaluation <strong>of</strong> optical elements<br />
• Evaluation <strong>of</strong> test plates in medical, industrial and military<br />
applications<br />
Beam Path for V and W Positions for PIKE Absolute Reflectance Accessory<br />
Sample reflectance is usually measured in comparison to a high<br />
reflectance diffuse gold or a high reflectance gold mirror. The<br />
sample reflectance is measured and calculated against these<br />
standards that have 94-99% reflectance in the infrared region.<br />
Absolute reflectance measurement has to be even more<br />
accurate than measured by other accessories. Unfortunately, no<br />
standards exist today that have guaranteed 100% reflectance,<br />
against which unknown samples could be compared. PIKE<br />
<strong>Technologies</strong> have developed a new Absolute Reflectance accessory<br />
which does not require reflectance standards due to its unique<br />
V / W optical arrangement. The beam in the V position reflects<br />
from the reference mirror. In the W position it is reflecting from<br />
the sample twice and the same reference mirror. The absolute<br />
reflectance <strong>of</strong> a sample is then the square root <strong>of</strong> the measured<br />
value at a given wavenumber or wavelength. The two configurations<br />
are easily selected by rotating the sample holder 180 degrees<br />
with its pinned-in-place mount and the sample is held by a quickrelease<br />
mount.<br />
Spectrum <strong>of</strong> a Silicon Plate Measured in the PIKE Absolute Reflectance<br />
Accessory<br />
Absolute Reflectance Accessory<br />
P ART N UMBER<br />
014-10XX<br />
O RDERING I NFORMATION<br />
D ESCRIPTION<br />
Absolute Reflectance Accessory<br />
Includes: V / W sample holder, gold substrate alignment<br />
mirror and <strong>FTIR</strong> base mount<br />
Notes: Select <strong>FTIR</strong> XX code from the last page <strong>of</strong> this catalog.<br />
Absolute Reflectance Parts and Sampling Options<br />
P ART N UMBER D ESCRIPTION<br />
300-0002 Gold Substrate Alignment Mirror (1.25" x 3.0")<br />
162-5460 Specular Reflectance Standard<br />
44
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