Patent attributes
Provided are: a long optical laminate prepared by laminating two obliquely stretched long phase-difference films so that the respective delayed-phase axes cross each other at a specified angle, while at least one of the two phase-difference films is a film containing residual volatile component by 1000 ppm or less; a long optical element prepared by laminating the optical laminate on one surface of polarization film; a long broad-band ¼ wavelength plate; an optical member prepared by laminating a circularly polarized light separating layer of cholesteric liquid crystal on one surface of the broad-band ¼ wavelength plate; a broad-band circular element using the broad-band ¼ wavelength plate; and an optical product having the broad-band circular polarization element. The invention provides long optical laminates having high optical characteristics stability, long broad-band ¼ wavelength plates, long optical elements, broad-band circular polarization elements, and various optical products having the broad-band circular polarization element.
