| 摘要 |
FIELD: physics, optics.SUBSTANCE: invention relates to lens holders and can be used in optical engineering. The lens holder includes a rotatable lug ring, a lens holding cylinder arranged on the outer circumference of the lug ring and configured to hold the lens, and a barrier cylinder configured to hold the lens barrier. The barrier cylinder includes a cylindrical portion, a first protrusion which extends from the cylindrical portion to the image plane, and a cam interlocking portion which is interlocked with a cam groove of the lug ring. The lens holding cylinder includes a cylindrical portion and a second protrusion. The second protrusion of the lens holding cylinder overlaps with the cam interlocking portion of the barrier cylinder in a radial direction, perpendicular to the direction of the optical axis.EFFECT: high image quality.7 cl, 5 dwg |
