Optical system and optical method for measuring human eye white-to-white distance

Abstract

An optical system for measuring human eye white-to-white distance comprises a first optical system and a second optical system, wherein the first optical system is composed of a double-light-emitting light source, a double-path diaphragm, a first lens, a dichroscope and an eye lens on a light path in sequence; the second optical system is composed of the dichroscope, a second lens and an iris pickup device on the light path in sequence. The double-light-emitting light source transmits through the first lens after passing the double-path diaphragm, a part of light beams transmit the dichroscope, enter human eyes through the eye lens and focus on the irises of the human eyes. A part of light beams is reflected by the irises, transmits to the eye lens, is reflected by the dichroscope and then transmits to the second lens, and finally images on the iris pickup device. The double-light-emitting light source is arranged on one of focal planes of the first lens, another focal plane of the first lens is superposed on one of focal planes of the eye lens. By the aid of the optical system and the optical method, parameters such as the eye white-to-white distance and the pupil diameter can be accurately measured.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an optical system and method for measuring the distance from the white of the human eye to the white. Background technique [0002] When many ophthalmic instruments are used, due to the uncertain front and rear relative positions of the human eye and the instrument probe, or the inconsistency of the anterior chamber depth of the human eye, it is impossible to directly and accurately measure the pupil width and white-to-white distance of the human eye. Specifically, because the depth of the anterior chamber of different people is different, or the distance between the cornea and the probe is different when measuring, if the white-to-white distance is measured directly through the iris imaging optical path, due to the uncertainty of the distance between the iris and the eye lens , resulting in a change in the magnification of the optical path of the system, so it is impossi...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an optical system and method for measuring the distance from the white of the human eye to the white of the human eye, aiming to solve the problem that the distance from the white of the human eye to the white of the human eye cannot be accurately measured due to the different thickness of the anterior chamber of the human eye or the change in the distance between the human eye and the probe.

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