Patent ID: 9671677
Date: 2017-06-06
CPC Classifications: G03B

Claim:
1. A focal-plane shutter assembled in an optical axis direction, the focal-plane comprising: a first planar substrate arranged in a deployment direction perpendicular to the optical axis direction and having a first opening formed therein extensive in the deployment direction; a second planar substrate so arranged as to face the first planar substrate substantially in parallel to the first planar substrate and having a second opening formed therein in alignment with the first opening along the optical axis direction; a curtain arranged between the first planar substrate and the second planar substrate and operable in the deployment direction between an open position where the curtain is retracted to open the first opening and the second opening and a closed position where the curtain is deployed to close the first opening and the second opening to close the first opening and the second opening; a lever mechanism operable to deploy or retract the curtain between the open position and the closed position; and a protruding section protruding in the optical axis direction from the second planar substrate towards the curtain retracted at the open position, wherein the protruding section so protrudes toward the curtain that it has a clearance with the curtain settled at the open position, whereas it comes into contact with the curtain retracting toward the open position with a displacement in the optical axis direction to bring the curtain in settlement at the open position.