| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for forming effective apertures of different sizes in positive resist layers on optical surfaces of a plurality of lenses that are stacked to constitute a group of photographing optical system, by a single exposure process. <P>SOLUTION: Lens arrays 11 to 13 having light-shielding films formed on front and back surfaces thereof and having a plurality of lenses 14, 22, 23 formed therein, respectively, are stacked. A light source 30 that exits parallel beams is rotated in 360 degrees around an optical axis 40, at an appropriately selected inclination angle between 0 and θ/2 (θ represents a photographing angle of view of the lenses) with respect to the optical axis, to irradiate the lens arrays so as to expose the whole range within the effective diameters of the all lenses. The light-shielding films in the exposed range are removed by a developing process to form effective apertures in the respective optical surfaces. <P>COPYRIGHT: (C)2013,JPO&INPIT |
