| 摘要 |
An optical deflector comprises a deflector for deflecting an optical beam, a cover provided with a cylindrical portion covering a peripheral surface of the deflector, an opening portion provided in the cover to let the optical beam pass therethrough, and a nearly tubular projecting portion surrounding the opening portion while opening outside the opening portion. Another optical deflector comprises a deflector for deflecting an optical beam, a cover provided with a cylindrical portion covering a peripheral surface of the deflector, an opening portion provided in the cover to let the optical beam pass therethrough, and a guide member projecting from the cylindrical portion of the cover along a tangent plane thereto. The optical deflectors can reduce wind noise. <IMAGE> |
