Multi-focus frequency domain OCT adaptive focusing device and method thereof

Abstract

The invention provides a multi-focus frequency domain OCT adaptive focusing device and a method thereof, and relates to the technical field of optical imaging. The device comprises an electric lifter.An object lens, a first half-transparent and half-reflection mirror, an eye lens and a second half-transparent and half-reflection mirror are successively arranged on a carrier plate. A light collecting mirror is arranged under a diaphragm. A white-light light source is arranged next to the light collecting mirror and is electrically connected with a computer through a wire. A first fiber collimating mirror, a second fiber collimating mirror, a third fiber collimating mirror and a fourth fiber collimating mirror are arranged next to the first half-transparent and half-reflection mirror. The first fiber collimating mirror, the second fiber collimating mirror, the third fiber collimating mirror and the fourth fiber collimating mirror are connected with an optical switch through wires. The beneficial effects are that it is ensured that the a micro-imaging system acquires high definition images; and meanwhile, it is achieved that clear view field area is increased and quite high focusingprecision is obtained in a field depth range.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a multi-focus frequency-domain OCT self-adaptive focusing device and a method thereof. Background technique [0002] The focus of traditional microscopes is generally adjusted manually. Such a focusing process requires certain operating skills. If the operator is inexperienced, it is often impossible to determine the focus. When adjusting, it is impossible to judge whether to raise or lower the objective lens to the sample. distance, causing some inconvenience. The autofocus systems currently proposed mainly include autofocus systems based on external auxiliary measurement equipment and autofocus systems based on image quality evaluation. The former realizes autofocus through the distance between the optical system and the imaged target, but this method is complicated to install and debug and the system structure is complicated, so it is rarely used. The latter uses the...

AI Technical Summary

Problems solved by technology

Both of these methods are limited by motor accuracy, hysteresis error and response speed during motor movement, which will cause focusing errors

At the same time, the focal length of the electric zoom lens changes, resulting in changes in the imaging characteristics of the microscopic imaging system, which cannot guarantee the same magnification before and after focusing.

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