A Large-Aperture Variable Iris Directly Driven by a V-Shaped Mode-Coupled Ultrasonic Motor: Design, Optimization, and Experimental Validation
Benchao Lv, Jun Zhao, Hongsheng Sun, Xucong Bao, Tong Zhao, Xiaolin Wang, Zhiyuan Yao, Xinjian Li, Xiaoniu Li · 2026
Read A Large-Aperture Variable Iris Directly Driven by a V-Shaped Mode-Coupled Ultrasonic Motor: Design, Optimization, and Experimental Validation by Benchao Lv, Jun Zhao, Hongsheng Sun, Xucong Bao, Tong Zhao, Xiaolin Wang, Zhiyuan Yao, Xinjian Li, Xiaoniu Li (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13609041.txt.
Description
Benchao Lv and co-authors build a wide variable iris driven directly by an ultrasonic motor, in a 2026 paper. Camera and lens irises must change their opening smoothly inside a thin body. Their prototype uses twenty blades. The opening spans from five and a half to ninety-eight millimeters.
A wave-spring bearing holds the blades snug while letting the drive ring turn with low drag. Computer models showed the blade stack is far stiffer than the spring, so flex lands where it should. A planned test matrix tuned the motor's stator. Measured vibration modes sat close to the simulated ones. Direct ultrasonic drive could give large lenses a slimmer, faster iris than gear trains.
Catalog record
| CREATOR | Benchao Lv, Jun Zhao, Hongsheng Sun, Xucong Bao, Tong Zhao, Xiaolin Wang, Zhiyuan Yao, Xinjian Li, Xiaoniu Li |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 41 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |