Design of compact high zoom ratio infrared optical system

Optical design of an underwater wide working distance robot vision lens

“…Since underwater optical windows introduce additional aberrations, they need to be optimized again after adding underwater optical windows to the initial structure that has completed initial optimization. [6] The subsequent optimization process is aimed at the underwater operating environment.…”

Measurement method of optical axis parallelism of continuous zoom camera based on skeleton thinning algorithm

“…Continuous zoom cameras can image and measure objects at different distances, which have been widely used and researched in security monitoring, visual tracking and precision measurement. In the zooming process, inconsistencies of optical axes will cause declines in image quality and target shifts, negatively impacting performances of tracking and measurements of targets 1 . The current measurement methods of optical axis parallelism include collimator method, projection target-board method, laser optical axis instrument method 2 , pentaprism method 3 and so on.…”

Water-filled low-resistance optical fairing for unmanned underwater vehicles

“…One of the common solutions is to replace the fairing with optical flat panel, but it will increase water resistance of underwater vehicle and affect the hydrodynamic performance 17,18 . Another solution is to carefully design the optical fairing and choose an optical camera that matches the additional focal length brought by the curvature of optical fairing, so that the optical fairing becomes a part of the camera lens 19,20 . The position of optical camera and optical fairing must be set strictly and precisely.…”