Chinese Academy of Sciences

Ling Wei

Yudong Zhang

Xiqi Li

Yi He

Guohua Shi

Zhibin Wang

Jinsheng Yang

Guogua Shi

The present disclosure provides an adaptive optical retina imaging apparatus and method. The adaptive optical retina imaging apparatus comprises an optical processing unit, an adaptive optical unit, a two-dimensional scanning unit and a primary aberration correcting unit, in which an imaging unit included in the optical processing unit is imaging based on the signal after high order aberration compensation and low order aberration compensation. By combining the adaptive optical technique, a con-focal scanning technique and the optical coherence tomography technique, two wave front sensors are utilized to detect wave front aberrations between the con-focal scanning optical path and the optical coherence tomography optical path and two wave front correctors are utilized to correct low order aberration and high order aberration of human's eyes, so as to implement low order aberration and high order aberration for the two optical paths and to implement imaging of human's eyes in a higher transverse resolution and a higher longitudinal resolution.

Adaptive optical retina imaging device and method

The present invention provides a method of fast image construction. The wavelength information is extracted in advance based on characteristics of a Fourier domain Optical Coherent Tomography (OCT) system, to obtain a vector of wavelengths which are in a uniform distribution in a wave number space, and thus to obtain a virtual position coefficient of this wavelength vector at a CCD, from which a weight matrix is calculated based on a transfer function for a discrete Fourier transform with zero-padding interpolation. In operation of the system, the interpolation is carried out based on the weight matrix and collected data, or is carried out based on the weight matrix which has been truncated by being subject to windowing and the collected data, to obtain interpolated data satisfying requirements. The method according to the present invention is simple and easy to implement, by which, it is possible to improve the precision and speed of the Fourier domain OCT data process, and thus to improve the capacity of real-time image reconstruction of the Fourier domain OCT system.

Method of fast image reconstruction

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Sichuan, China

Ling Wei