Patent ID: 7715301
Filing Date: 2010-05-11
Classification: G02B,G11B

Abstract:
1. A wave plate having a plane of light incidence coated with an optical multi-layer coating formed by alternately laminating a high refractivity layer and a low refractivity layer one on another and to transmit one of perpendicularly intersecting polarized components of an incident light beam as a phase advancing axis and to transmit the other polarized component as a phase retarding axis, said plane being set up as a perpendicularly intersecting plane located on perpendicularly intersecting X- and Y-axes in perpendicularly intersecting relation with optical axis of an incident light beam on said optical multi-layer coating, and said perpendicularly intersecting plane being inclined through a predetermined angle relative to said X- and/or Y-axis and rotated through a predetermined angle about a Z-axis corresponding to said optical axis of an incident light beam to let said optical multi-layer coating function as a phase plate.