Conical Refraction Experimental Kit (CREK)
                       For Education and Research
Proposed CREK is designed for easy demonstration and study of the most distinctive features of conical refraction:
 - the light ring,
 - the Poggendorff dark ring 
 - the Raman bright spot. 
The excellent performances of CREK allow for observation of specific conical refraction details that have not  been revealed in historical experiments.  

 
						