Abstract: The present invention proposes a human eye adaptive optical visual perception training apparatus, comprising: a human eye wave aberration measurement sub-system for measuring the human eye wave aberration of a person to be tested; a human eye wave aberration correction sub-system for driving and controlling the wavefront corrector to correct the human eye wave aberration of the person to be tested based on the measured human eye wave aberration of the tested person; and a visual perception training sub-system for processing and displaying sighting targets of different spatial frequencies and different contrasts, and presenting the sighting targets to the tested person, to conduct a human eye visual function measurement process and a visual perception training process. The apparatus according to the present invention is capable of several functions including eye aberration correction, visual function measurement, visual perception training.

Abstract: The present invention proposes a human eye adaptive optical visual perception training apparatus, comprising: a human eye wave aberration measurement sub-system for measuring the human eye wave aberration of a person to be tested; a human eye wave aberration correction sub-system for driving and controlling the wavefront corrector to correct the human eye wave aberration of the person to be tested based on the measured human eye wave aberration of the tested person; and a visual perception training sub-system for processing and to displaying sighting targets of different spatial frequencies and different contrasts, and presenting the sighting targets to the tested person, to conduct a human eye visual function measurement process and a visual perception training process. The apparatus according to the present invention is capable of several functions including eye aberration correction, visual function measurement, visual perception training.

Abstract: The present invention proposes a two-eye adaptive optical visual perception training apparatus, comprising: left and right eye wave aberration measurement sub-systems for measuring eye wave aberrations of the left and right eyes of a person to be tested; left and right eye wave aberration correction sub-systems for driving and controlling the wavefront corrector to correct the wave aberrations of the left and right eyes of the person to be tested based on the measured wave aberrations of the left and right eyes of the tested person; and a two-eye visual perception training sub-system for processing and displaying sighting targets of different spatial frequencies and different contrasts and presenting the sighting targets to the tested person, to conduct a two-eye visual function measurement process and a visual perception training process.

Abstract: A cavity ring-down apparatus and method is provided for measuring the reflectivity of highly reflective mirrors. The apparatus comprises an optical ring-down cavity including three highly-reflective mirrors whose frequency-selective optical transmission is retro-reflected into the oscillator cavity of a continuous-wave semiconductor laser, creating a change of output spectrum of said laser and enhancing the coupling coefficient of the laser power into the optical ring-down cavity. The drive current/voltage of the semiconductor laser is modulated by a square-wave function output by a function generation card. Thus the laser beam is suddenly switched off at the negative step of the square-wave signal periodically. Immediately after switching off the laser beam, an exponential decay signal of the ring-down cavity is measured by a photo detector and used to determine the decay time of the cavity and the reflectivity of highly reflective mirrors.

Abstract: 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.