Patent 7791828 was granted and assigned to Fujinon on September, 2010 by the United States Patent and Trademark Office.
An O-ring 12 is disposed on an image-side second outer peripheral surface 11—1b, which is subjected to a smoothing process, of a taking lens 11—1. The O-ring 12 is pressed by an inner surface 13a of a lens frame 13 toward the second outer peripheral surface 11—1b.