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Summary of Contents for Pike 10Spec
- Page 1 Installation and User Guide 10Spec 10 Degree Specular Reflectance Accessory...
- Page 2 This publication may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of PIKE Technologies, Inc. nor the rights of others. PIKE Technologies, Inc. does not assume any liability arising out of any infringements of patents or other rights of third parties.
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Page 3: Table Of Contents
Contents Introduction Optical Diagram Unpacking Your Accessory Packing List Installation Accessory Installation Accessory Alignment Performance Verification Using Your 10Spec Accessory Reflectance Spectra and Applications Free Standing Films Effect of Dispersion Kramers-Kronig Transform Precautions Maintenance Parts PN 350-010000-05... -
Page 4: Introduction
Introduction The 10Spec features a collimated beam that strikes the sample at a 10° angle of incidence. The size of the collimated beam at the sample is approximately 12 mm. The accessory may be used to measure the reflectivity of glass per ASTM Standard E1585-93 and other specular reflectance experiments. The 10Spec is well suited for specular reflectance measurements of polymers, reflectivity studies of polished metals and transmission-reflectance work. -
Page 5: Unpacking Your Accessory
Unpacking Your Accessory In order for you to quickly verify receipt of your accessory, we have included a packing list. Please inspect the package carefully. Packing List 10Spec Manual 10Spec Accessory Sample Masks (3/8”, 5/8”, 2”) PN 350-010000 PN 010-10XX... -
Page 6: Installation
Installation The 10Spec accessory has been aligned and tested in the PIKE Technologies facility on the make of your FTIR spectrometer to ensure that it performs to specifications. However, some variation in optical alignment can occur from spectrometer to spectrometer. To allow for this difference, there are alignment screws located within the 10Spec assembly for fine-tuning once the accessory is installed in the spectrometer. - Page 7 7. Repeat the entire procedure two to three times to fine-tune the accessory. This is an initial alignment procedure which optimizes the 10Spec to work with an individual optical bench. Once completed, the alignment does not have to be repeated unless the accessory adjustments have been moved or it has been placed in a different FTIR instrument.
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Page 8: Performance Verification
With the accessory removed from the sample compartment, collect a background spectrum. Place the 10Spec accessory in the sample compartment with the alignment mirror face down on the top surface of the accessory. Collect a transmission spectrum using the same collection parameters as used to collect the background spectrum. -
Page 9: Reflectance Spectra And Applications
Reflectance Spectra and Applications Reflectance spectroscopy is useful for the measurement of films on metallic substrates, the thickness of free standing transmitting films and for the characterization of samples which do not transmit IR radiation and so cannot be measured by other techniques. Free Standing Films Free standing films exhibit a fringe pattern in the collected spectrum due to constructive and destructive interference caused by reflection from both sides of the thin film. -
Page 10: Effect Of Dispersion
The spectrum below is a reflection-absorption spectrum of the plastic film. The sample is placed on the accessory and a mirror is placed on top of the sample. The spectrum shows no sign of interference fringes. The band shapes are correct and have twice the absorption of the transmission case, consistent with the double passage of the infrared beam through the sample. -
Page 11: Kramers-Kronig Transform
In the vicinity of an absorption band the refractive index varies considerably, an effect known as anomalous dispersion. So a reflection spectrum is formed because the refractive index changes around an absorption band. Absorption Absorption Wavelength Band Band Figure 7: Spectrum exhibiting anomalous dispersion Kramers-Kronig Transform In order to produce a spectrum that is corrected for this anomalous dispersion, a correction known as a Kramers-Kronig transformation may be performed on the spectrum. -
Page 12: Precautions
“Kleenex” since this will produce scratching of the mirror coating. Maintenance Parts The following parts may be ordered separately: Description Part Number 10Spec Alignment Mirror 300-0002 10Spec Sample Mask Set 010-3010 PN 350-010000-05 P a g e... - Page 13 6125 Cottonwood Drive · Madison, WI 53719-5120 · (608) 274-2721 (TEL) · (608) 274-0103 (FAX) info@piketech.com · www.piketech.com...
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