| 摘要 |
<p>On an outer circumference of an adjusting lens holder (11), a ring-shaped first protruding section (12) is arranged to protrude to a case (3). On an inner circumference portion of the case (3), a ring-shaped second protruding section (13) is arranged to protrude to the adjusting lens holder (11). The first protruding section (12) is arranged outside the second protruding section (13), an interval (B) between the both protruding sections (12, 13) is permitted to be smaller than a clearance (A) between the adjusting lens holder (11) and the case (3), and the height of the first protruding section (12) is permitted to be lower than that of the second protruding section (13). The minimum value of the clearance (A) is a value of "A-B", and a space is provided between the first protruding section (12) adjacent to the clearance (A) and the case (3). Thus, an adhesive is prevented from leaking out at the time of applying the adhesive in the clearance (A), and the space is filled with the adhesive. An optical system is prevented from breaking due to dropping impact by strongly fixing the adjusting lens holder (11) to the case (3).</p> |
