JP2004045853A5 - - Google Patents

Claims (14)

In an optical multilayer film in which a plurality of films are laminated, when the design wavelength is λ0, a first thin film group consisting of a single layer or an alternating layer with an optical film thickness of λ0 / 4 and a single layer of 2λ0 / 4 or λ0 / 4 And a second thin film group consisting of alternating layers of 2λ0 / 4 and a third thin film group consisting of single layers of 4λ0 / 4 or alternating layers of λ0 / 4 and 4λ0 / 4 . When the division of each thin film group is determined by the priority order of the three thin film groups, the second thin film group, and the first thin film group, the thin film groups including at least two kinds of thin film groups and including a single layer are adjacent to each other. An optical multilayer film characterized by comprising a non-basic structure .   In the basic configuration, the first thin film group and the second thin film group, or the first thin film group and the third thin film group, or the second thin film group and the third thin film group continuous with the first thin film group are alternately provided. The optical multilayer film according to claim 1. 2. The optical multilayer film according to claim 1, wherein the total optical film thickness of all the thin film groups is in the range of 0.9 to 1.05 times the total optical film thickness of the film thickness of the basic configuration . 4. The optical multilayer according to claim 3, wherein the total optical film thickness of the first thin film group is in the range of 0.9 to 1.15 times the total optical film thickness of the first thin film group having the basic configuration. film. The sum of the total optical film thicknesses of the second thin film group and the third thin film group is 0.85 to the sum of the total optical film thicknesses of the second thin film group and the third thin film group of the basic structure. 3. The optical multilayer film according to claim 2, wherein the optical multilayer film is in a range of 1.0 times.   2. The optical multilayer film according to claim 1, wherein the basic configuration includes a first thin film group composed of three λ0 / 4 layers.   2. The optical multilayer film according to claim 1, wherein the basic configuration includes a second thin film group composed of three layers of two λ0 / 4 layers and one 2λ0 / 4 layer. Optical multilayer film according to claim 7, wherein said 2λ0 / 4 layers and having a refractive index of 2.0 or more refractive index.   2. The optical multilayer film according to claim 1, wherein the basic configuration includes a third thin film group composed of three layers of two λ0 / 4 layers and one 4λ0 / 4 layer. Optical multilayer film according to claim 7, wherein said 4λ0 / 4 layers and having a refractive index of 2.0 or more refractive index.   8. The optical multilayer film according to claim 7, wherein the sum of the actual optical film thicknesses of the three layers of the second thin film group consisting of the three layers is in the range of 2.5λ0 / 4 to 5λ0 / 4. The basic structure includes a first thin film group consisting of the three layers and a second thin film group consisting of the three layers, and a first thin film group consisting of the three layers and two adjacent three layers. The optical multilayer film according to claim 6 or 7, wherein the sum of the optical film thicknesses of the three thin film groups with the thin film group is in the range of 8.5λ0 / 4 to 11λ0 / 4.   The basic configuration includes a first thin film group consisting of the three layers and a second thin film group consisting of the three layers, and a second thin film group consisting of the three layers and two adjacent three layers. The optical multilayer film according to claim 6 or 7, wherein the sum of the actual optical film thicknesses of the three thin film groups with the thin film group is in the range of 9.5λ0 / 4 to 11.5λ0 / 4. 14. An optical element, wherein the optical multilayer film according to any one of claims 1 to 13 is formed on a substrate , reflects green band light, and transmits blue band and red band light .