Patent Number: 7,826,138

Title: Dichroic mirror

Abstract: A dichroic mirror includes a substrate, a first film stack, and a second film stack. The first film stack is deposed on the substrate and has a structure represented by a first formula: (2HL).sup.n. The second film stack is deposed on the first film stack and has a structure represented by a second formula: (0.325H0.65L0.325H).sup.m. `2HL` and `0.325H0.65L0.325H` respectively represent a double-layer sub-structure of the first film stack and a sandwiched sub-structure of the second film stack, and `n` and `m`, which are integers, respectively represent the number of repetitions of the double-layer sub-structures and sandwiched sub-structures `H` and `L` respectively represent a high refractive index layer and a low refractive index layer, both of which have a height equal to 1/4 of the reference wavelength of the dichroic mirror, and `2`, `0.325` and `0.65` are height coefficients.

Inventors: Lin; Juin-Hong (Taipei Hsien, TW)

Assignee: Hon Hai Precision Industry Co., Ltd.

International Classification: G02B 1/10 (20060101); G02B 27/14 (20060101)

Expiration Date: 2019-11-02 0:00:00