LIGHT DISPERSION COMPENSATION ELEMENT AND LIGHT DISPERSION COMPENSATION METHOD USING THE ELEMENT

摘要

A light dispersion compensation element comprising a multi-layer film having at least three reflection layers and at least two light transmitting layers formed between the reflection layers, wherein at least one light transmitting layer changes in its film thickness in an in-plane direction at a section parallel to the light incident surface of the multi-layer film, that is, in an incident in-plane direction, and a means of regulating the film thickness of at least one laminated film of the multi-layer film or a means of changing a light beaming position on the incident surface of the multi-layer film is provided.