Patent ID: 7167736

Claim:
An apparatus, comprising: a. a light source adapted to transmit light towards an object containing a solution of an optically-active substance; b. a polarizer, positioned between said light source and said object; c. a first image capturing device, positioned to receive a portion of light reflected from said object and adapted to create a measured image therefrom, said measured image defining measured light intensity data; d. a processor; and e. a database, said database comprising predetermined concentration data for said optically-active substance and predetermined light intensity data, wherein said processor is further configured to calculate a concentration of said optically-active substance based on a selected portion of said measured light intensity data, a selected portion of said predetermined concentration data, and a selected portion of said predetermined light intensity data; wherein said predetermined concentration data comprises one or more known concentration values and said predetermined light intensity data comprises one or more predetermined calculation space ratios.