Three-dimensional motion positioning device and optometry device

Abstract

The invention discloses a three-dimensional motion positioning device. An X-axis movable support transversely moves horizontally relative to a device body base through an X-axis ball screw and an X-axis guide rail, a Z-axis movable support vertically moves horizontally relative to the X-axis movable support through a Z-axis guide rail and the Z-axis movable support which are arranged at the two sides of the X-axis movable support, a Y-axis movable support transversely moves horizontally relative to the Z-axis movable support through a Y-axis ball screw and a Y-axis guide rail, the Y-axis guiderail is perpendicular to the X-axis guide rail, the X-axis ball screw, the Z-axis ball screw and the Y-axis ball screw are driven by a motor to rotate, an optical instrument arranged on the Y-axis movable support can move inside the three-dimensional space and move between the two eyes, due to the cooperative mode of the ball screws and the guide rails, more precise control can be achieved, the positions of the ball screws and the guide rails are reasonably arranged, and precise positioning is performed inside the small space.

Description

technical field [0001] The invention relates to the technical field of computer optometry, and further relates to a three-dimensional motion positioning device. In addition, the invention also relates to an optometry device. Background technique [0002] When the computer refractor is working, it is necessary to align the measurement window of the optical mechanism with the patient's eye. There is only one set of optical mechanism, which can test one eye at a time and move and adjust between the two eyes; the accuracy and stability of the movement mechanism will directly affect the measurement accuracy. The existing movement mechanism of various refractometers is mostly controlled by the handle to realize the three-dimensional movement of the optical mechanism, and the movement pair mostly uses ordinary slide rails, which need to be repeatedly aligned and focused during work, and slippage is prone to occur during measurement, causing inaccurate measurement allow. [0003] ...

AI Technical Summary

Problems solved by technology

[0002] When the computer refractor is working, it is necessary to align the measurement window of the optical mechanism with the patient's eye. There is only one set of optical mechanism, which can test one eye at a time and move and adjust between the two eyes; the accuracy and stability of the movement mechanism will directly affect the measurement accuracy. At present, the movement mechanism of various refractometers is mostly controlled by the handle to realize the three-dimensional movement of the optical mechanism. The movement pair mostly uses ordinary slide rails, which need to be aligned and focused repeatedly during work, and slippage is prone to occur during measurement, causing inaccurate measurement. allow

[0003] The internal space of the optometry instrument is narrow. For those skilled in the art, how to achieve accurate positioning in the narrow space is a technical problem that needs to be solved at present.

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