iris diaphragm

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.

日本語の意味

虹彩絞り：カメラや顕微鏡などの光学機器で使用される、円形の開口部の直径を調節するために用いられる調節可能な絞り機構。薄い曲線状のプレートがリングの内側に等間隔に固定され、外側のノブ一つで同時に位置が調整される。

英語の意味

An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.

このボタンはなに？

Carefully adjust the iris diaphragm to reduce the glare and sharpen the image before taking the photograph.

写真を撮る前に、まぶしさを抑え画像を鮮明にするために虹彩絞りを慎重に調整してください。

詳細

意味（1）

An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.

iris diaphragms （ plural ）