A Babinet Soleil Compensator ( BSC ) is placed between two crossed polarizers ( axes perpendicular to each other ) in such a way that the linear input polarization from the first polarizer is at 45 degrees to the fast axis of the compensator. Viewing through the second polarizer in a white light source, a black cross ( Null ) is observed at zero reading of the micrometer. This is zero retardation reading of the BSC. An unknown retardation to be measured is introduced between BSC and the polarizer. The BSC micrometer is turned until the black cross ( Null ) is observed again. The micrometer reading is an indirect measure of unknown retardation. A calibration chart is provided with each BSC which gives retardation in waves at a specific wavelength vs the micrometer reading.

BMI Surplus, Inc. has a huge inventory of used, new, pre-owned and recycled Polarizers and Retardation Plates for sale.
We will work with you individually to find the perfect set up for your application.

Buy online or give us a call at 781-871-8868. We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific & Industrial Equipment – we cater to clients in search of items to be used for specific applications.
We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though in they are in good used condition.

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We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 32 years of experience shipping sensitive scientific instruments & industrial equipment!

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***MPN K1148
***OEM Karl Lambrecht Corporation
***SKU*** 15474