OPTICAL LAMINATE

摘要

A long optical laminate comprising two obliquely-stretched, long phase-difference films laminated so that respective delayed-phase axes cross each other at a specified angle, at least one of the two phase-difference films having a residual volatile component amount of up to 1000 ppm; a long optical element comprising the optical laminate laminated on one surface of a polarization film; a long broad-band 1/4 wavelength plate; an optical product member comprising a circular polarization selection-separating layer consisting of cholesteric liquid crystal and formed on one surface of the broad-band 1/4 wavelength plate; and a broad-band circular polarization element using the broad-band 1/4 wavelength plate and an optical product provided with the broad-band circular polarization element. Provided are a long optical laminate excellent in stability of optical characteristics, a long broad-band 1/4 wavelength plate, a long optical element, and a broad-band circular polarization element and various optical products provided with the broad-band circular polarization element.