| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain further miniaturization of an imaging apparatus without causing deterioration in performance of the imaging apparatus (zooming magnification, flare and ghost prevention). Ž<P>SOLUTION: When a distance between the center of an optical axis 20 and the inner surface of a main lens barrel 11b is expressed by H, and a distance between lens surfaces when a front lens and a zoom lens 14 separates most is expressed by L, and an incident angle of incident light 21 made incident on the front lens from the object side is expressed by θ, the zoom lens satisfies relational expression of H<tanθ×(L/2). A reflection groove 18 for reflecting the incident light 21 is formed along the direction of the optical axis 20 in the inner surface of the main lens barrel 11b. The reflection groove 18 has an opening width W of ≥0.6D to the diameter D of the zoom lens 14, and includes: a valley portion 18a located at the longitudinal center thereof; and side inclined portions 18b symmetrically formed on both sides of the valley portion 18a, and having a circular-arcuate surface downwardly becoming convex. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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