| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device in which light having various wavelengths is surely demultiplexed. SOLUTION: The optical device shown in Fig. 1 passes the light having a specific wavelength band among incident light L1 and comprises: a first structure body U1 which has a pair of reflection films 312a and 312b and a first displacement means which makes the reflection films approach to and separate from each other of the reflection films, and is so composed that the light L2 having a wavelength band corresponding to the distance h1 between the reflection films is passed; a second structure body U2 which has a pair of reflection films 312c and 312d and a second displacement means which makes the reflection films approach to and separate from each other of the reflection films, and is so composed that the light L3 having a wavelength band corresponding to the distance h2 between the reflection films is passed to the outside. The optical device is composed by arranging the first structure body U1 and the second structure body U2 along the optical axis of the incident light L1. COPYRIGHT: (C)2007,JPO&INPIT
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