Figure 5
Relationship between the aperture and curvature of the measured area. (a) Measured area with the largest aperture. (b) The first case, where the aperture of the measured area equals the aperture of the pinhole and the radius of curvature of the measured area is R1. (c) The second case, where the aperture of the measured area equals the aperture of the pinhole and the radius of curvature of the measured area is R2. |