Patent ID: 7572349

Claim:
A production method for an optical device having upper and lower principal planes, wherein a plurality of optical plates are bonded together and laminated by an adhesive, the method comprising the steps of: cutting and dividing an optical wafer into a plurality of optical plates, each plate having two principal planes; spreading an adhesive on at least one principal plane of at least one of said plurality of optical plates; arranging at least two optical plates in a stack, such that adhesive spread in the spreading step is arranged between adjacent principal planes of the at least two optical plates; pressing the stack of optical plates from both principal planes to overflow said adhesive from between said adjacent principal planes; and effusing and spreading said adhesive onto an outer peripheral side face of the stack and into a peripheral region of each of the upper and lower principal planes of the stack, wherein the adhesive between the principal planes of adjacent plates is continuous with the coating of adhesive on the outer peripheral side face of the stack and with the coating of adhesive on the peripheral region of each of the upper and lower principal planes of the stack.