Dipleydoscope or Dipleidoscope: How To spell?

The word Dipleydoscope is misspelled against Dipleidoscope, a noun meaning "An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian."

Word contains consecutive vowels 'EI' in between alphabets dipl & doscope is misspelled as 'EY'
Wrong Spelling:  dipl-ey-doscope 
Correct Spelling:  dipl-ei-doscope 
Find more incorrect spellings of Dipleidoscope to spell right way.