Patent ID: 9703174
Date: 2017-07-11
CPC Classifications: G03B

Claim:
1. An optical apparatus equipped with a barrier mechanism covering a lens exposed to a subject side through an opening part, the barrier mechanism comprising: a barrier driving ring; a plurality of barrier blades configured to be arranged overlapping in an optical axis direction of an optical axis of the optical apparatus, and to be driven by said barrier driving ring to rotate in an opening-and-closing direction for opening and closing the opening part; and a barrier barrel configured to be arranged at the outer peripheral side of said barrier driving ring, and to hold said barrier blades, wherein said plurality of barrier blades include: wherein the second shaft is located between the first shaft and the optical axis as viewed from the optical axis direction, when a line connecting the optical axis and an axis of the first shaft is disposed along an X-axis, while an Y-axis is defined to be perpendicular to both the optical axis and the X-axis, wherein the second shaft revolves around the first shaft, wherein each of the first and second auxiliary barrier blades is not directly connected to the first shaft so that each of the first and second auxiliary barrier blades is rotatable about the second shaft without coaxially rotating with the first shaft, and wherein each of the first and second auxiliary barrier blades is rotatable about the second shaft in a direction that is opposite in a revolving direction of the second shaft around the first shaft so that when the first and second auxiliary blades are rotating in the opening-and-closing direction thereof while the second shaft is revolving around the first shaft through the X-axis, moving amounts of the first and second auxiliary barrier blades in an Y-axis direction are greater than moving amounts of the first and second auxiliary barrier blades in an X-axis direction.