Optical element and projection type image display apparatus having optical element therein

摘要

In a projection type image display apparatus, it is intended to reliably facilitate assembly of optical members for polarization treatment and phase difference compensation of light. The optical members are each configured such that a protective layer such as a magnesium fluoride layer or an aluminum oxide layer is formed by vapor deposition over a light permeable substrate of cubic system structure comprising, for example, magnesium oxide and an adhesive layer is provided on the protective layer for fixing the element layers of a polarization element, a view angle compensation element, etc.