Skip to main content

Development, Justification, and Applications of a Mid-Infrared Polarization-Division Interferometer

Buy Article:

$29.00 plus tax (Refund Policy)


We report the development of a polarization-division interferometer (PDI) for the mid-infrared region. This interferometer uses a self-designed beamsplitter constructed in-house from a BaF2 polarizer and a matching substrate. In conjunction with a linear polarizer in front of the source and two roof-top mirrors, one in each arm of the interferometer, the PDI divides the input beam into two orthogonal linear polarization components, recombines them for interference at the beamsplitter, and directs the output beam at 90° to the direction of the input beam. Light exiting the interferometer is manipulated entirely with lenses, to avoid polarization distortions that are inherent to the reflecting surfaces of the mirrors. Details of the instrumental design for this mid-infrared PDI are presented. The performance of the PDI is evaluated by measuring the circular dichroism of a-pinene and camphor and the linear dichroism of oriented polypropylene and polystyrene. These measurements establish the utility of the PDI to measure transmission, circular dichroism, and linear dichroism spectra simultaneously without need for any additional components. The dichroic multiplex advantage (ability to measure dichroism in the entire mid-infrared region from a single measurement) and throughput advantage are demonstrated.

Keywords: Circular dichroism; Fourier transform infrared; Interferometry; Linear dichroism; Polarized infrared; Polymers

Document Type: Research Article


Affiliations: 1: Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235 2: Department of Chemistry, Vanderbilt University, Nashville, Tennesse, 37235 3: ATI Instruments N.A., 1001 Fourier Drive, Madison, Wisconsin 53717

Publication date: October 1, 1994

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more
Real Time Web Analytics