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A cell of variable thickness for optical studies of highly absorbing liquids

A new design of a simple and inexpensive optical cell of variable thickness for absorption coefficient measurements in highly absorbing liquids is presented. The cell, which can be also used with highly corrosive samples and up to temperatures of 300 degrees C, is suitable for measurements from the near infrared up to near ultraviolet. As an example, the absorption spectrum of liquid iodine measured over six decades is reported.