科研之友
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摘要
We report an ultra-compact optical zoom endoscope containing two tunable Alvarez lenses. The two tunable lenses are controlled synchronously by piezoelectric benders to move in directions perpendicular to the optical axis to achieve optical zoom while keeping images in clear focus without moving the scope. The piezoelectric benders are arranged circumferentially surrounding the endoscope optics with a diameter about 2 mm, which results in an ultra-compact form. The demonstrated endoscope is capable of optical zoom close to 3 x from field of view (FOV) 50 degrees to 18 degrees continuously with the required movements for its constituent optical elements less than 110 mu m. Such optical zoom endoscopes may find their potential uses in healthcare and industrial inspection systems.
- 出版日期2017-8-21
