| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging device which reduces generation of a ghost without spoiling productivity and performance of an optical filter, and also without requirement of a large space. SOLUTION: The optical filter 6 is arranged so that a surface facing an imaging element 8 becomes a convex shape. A part of a light ray of a wavelength area which transits from a transmission band to a non-transmission band of the optical filter 6, penetrates the optical filter 6 and is incident on the imaging element 8. Then it is reflected on a focus plane of the imaging element 8, and is incident again from a back side of the optical filter 6. At the time, a part of it penetrates the optical filter 6, but a part of it is further reflected on the optical filter 6 and goes to a direction of the focus plane of the imaging element 8. Since the optical filter 6 is arranged so that the surface facing the imaging element 8 becomes the convex shape, the direction of the reflection light moves from a center of the imaging element 8, and thereby the imaging device is provided which reduces the harmful ghost, and is high precision. COPYRIGHT: (C)2011,JPO&INPIT |
