Resin optical elements and methods for manufacturing resin optical elements

Abstract

The purpose of this invention is to provide a resin-based optical element that exhibits excellent adhesion between the optical thin film or inorganic oxide film formed on the surface of the optical effective surfaces and the resin surface layer of the substrate on all of its plurality of optically effective surfaces, and maintains good film adhesion and crack resistance even after high temperature and high humidity tests. To solve the above-mentioned problems, this invention provides a resin-based optical element characterized by having at least two optically effective surfaces comprising a laminated structure of a resin substrate and an optical thin film, wherein the laminated structure is formed sequentially by forming the resin substrate, the inorganic oxide film, and the optical thin film. In the optically effective surfaces, the surface degradation index (Isurf / Iint) of the tape-side peel surface of the resin substrate, measured by X-ray photoelectron spectroscopy analysis, satisfies the following relationship: 0.8 ≤ Isurf / Iint ≤ 1 (here, the normalized intensity of the peak originating from the C=O bond in the surface layer of the resin substrate is defined as Isurf, and the normalized intensity of the peak originating from the C=O bond in the resin substrate is defined as Iint).

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