| 摘要 |
PROBLEM TO BE SOLVED: To provide a focus detection result with a proper temperature correction. SOLUTION: A lens holding member 60 of a thin plate form is fixed in a curved state to a holding member 50 holding an image sensor 90, and a multiple lens body 40 is fixed on the curvature part. And, plural lens pieces of the multiple lens body 40 guide plural luminous fluxes passing through different areas of a photographic lens to an image sensor 90, and a focus adjustment state of the photographic lens is detected based on an output signal of the image sensor 90. Since the multiple lens body 40 is an integral molding of plural plastic lenses and a length between optical axes of lens pieces of the plural lens pieces varies due to temperature changes, a focus detection error is generated. On the other hand, a change in a warp of the curvature part of the lens holding member 60 due to temperature change causes a change in a length between the multiple lens body 40 and the image sensor 90, and this also causes a focus detection error. Here, it is preferable that the former focus detection error offsets the latter focus detection error with respect to the curvature of the lens holding member 60. Thus, it is possible to accurately correct the focus detection error caused by the change in the length between the optical axes of the lens pieces of the multiple lens body 40. |
