| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high refractive index low dispersion material which allows a close-contact double layer type diffraction optical element having excellent optical performance to be prepared, and also obtain an optical element prepared therewith.SOLUTION: An optical material is obtained by mixing a thiol resin comprising a material represented by a following chemical formula, and an acrylic resin, at the rate of 1:2-1:10, where the thiol resin comprises the material represented by the chemical formula, and 2,5-dimercaptomethyl-1,4-dithiane, and the acrylic resin is tricyclodecanedimethanoldiacrylate.SELECTED DRAWING: Figure 4 |
