Automated pMAIRS Measurement Accessory

Automated MAIRS Measurement Accessory

pMAIRS (p-polarized Multiple-Angle Incidence Resolution Spectrometry) is used for studying the molecular orientation of thin film materials used in applications such as liquid crystals, organic devices and fibers.

MAIRS is used to analyze molecular orientation using transmission measurement with incident light at several different angles, the substrate required must be non-metallic to allow transmission measurement. Generally in transmission measurement in which the incident light is perpendicular to the sample plate, the spectrum obtained is due only to the molecular vibration in the in-plane direction, when the transmission measurement is made with changes in the incident angle, the obtained spectrum will be expressed as the summation of the in-plane and out-of-plane vibrations, and linear unresponsive components such as noise. MAIRS measurement enables to simultaneous acquisition of spectra of the vibration of molecules oriented in both in-plane and out-of plane directions (sIP, sOP) by extracting components of only in-plane and out-of-plane vibration from single beam spectra (S measurement) at each incident angle using a regression matrix (rIP, rOP) which shows the ratio of in-plane and out-of-plane vibration. In the MAIRS method, in which quite small change in the peaks at each incident angle must be analyzed, a very high precision measurement system is required

Sample Holder2 positions
Rotation Angle of Sample0 - 45°
PolarizerWire-grid polarizer (KRS-5)
Solid-Angle MaskAvailable (1 mm dia. manual adjust)
Attenuator Transmittance4, 10 and 25%
IQ AccessoryAvailable
* An MCT detector is required (order separately)