| 摘要 |
<P>PROBLEM TO BE SOLVED: To downsize a spectral sensor and an angle restriction filter, and to manufacture an angle restriction filter including an optical path having an arbitral inclination angle. <P>SOLUTION: An angle restriction filter includes: a first light shielding layer having a first opening; and a second light shielding layer having a second opening and positioned above the first light shielding layer. The first and second light shielding layers are disposed such that the first opening and the second opening are partially overlapped when viewed from above the second light shielding layer and at deviated positions. A spectral sensor includes an angle restriction filter, a wavelength restriction filter, and a light receiving element. <P>COPYRIGHT: (C)2013,JPO&INPIT |
