Human eye axial chromatic aberration and transverse chromatic aberration measurement device based on Hartmann sensor and method thereof

Abstract

The invention discloses a human eye axial chromatic aberration and transverse chromatic aberration measurement device based on a Hartmann sensor and a method thereof. The device comprises a test light source, a first polarizer, a filtering and collimating device, a semi-permeable and semi-reflective mirror, a polarized light beam splitter, a de-noising and focusing system, the Hartmann sensor, a computer, a gaze light source, a second polarizer and a reflective mirror. By means of the method, transverse chromatic aberration and axial chromatic aberration at the concave portion of the center of a yellow spot can be measured, transverse chromatic aberration and axial chromatic aberration at different off-axis angles and distances can be quickly acquired, and the measurement range is further expanded; reliable bases are provided for ophthalmic diagnosis and treatment.

Description

technical field [0001] The invention relates to an optical detection device and a method thereof, in particular to a device for measuring axial chromatic aberration and lateral chromatic aberration of human eyes based on a Hartmann sensor and a method thereof. Background technique [0002] The existing objective aberrometer based on the Hartmann sensor eliminates the subjective factors of the human eye, and can measure the monochromatic wavefront aberration of the human eye in real time and quickly. etc. have achieved great success, but this device generally cannot measure the axial chromatic aberration and lateral chromatic aberration of the human eye. At present, the axial chromatic aberration and lateral chromatic aberration of the human eye are generally measured clinically subjectively, which takes a long time, is not accurate, and is not repeatable enough, which is not conducive to later treatment and correction. [0003] Utility model and invention patent "Human eye ...

AI Technical Summary

Problems solved by technology

However, this device can only measure the axial chromatic aberration of the emmetropic human eye along the visual axis, and does not consider the influence of the chromatic aberration of the device itself

[0004] The patent "Achromatic zoom system suitable for Hartmann sensor" (ZL200310110055.x) provides an achromatic method for the instrument itself, that is, a binary surface is etched on a lens closest to the Hartmann sensor. However, the The method can only achromatize the light that finally reaches the CCD, but in the system, such as the filter hole in the middle of the lens group, it cannot achromatize, which affects the denoising ability of the system, resulting in the spot array on the CCD not being clear enough. And then affect the measurement accuracy

In addition, the binary surface itself has stray light, especially when the light is obliquely incident, the stray light is large, which affects the measurement

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