Laser projected scale system

Abstract

The invention relates to a laser projected scale system which comprises a case, a projection source, a reflecting mirror, a scale and a movable element, wherein the movable element is arranged in the case and comprises a moving coil and a pointer arranged on the moving coil; the projection source is arranged at the upper back part of the case; the reflecting mirror is installed on the moving coil and is arranged at the upper part on the back side of the reflecting mirror; and the scale is arranged at the right front part of the case. The laser projected scale system also comprises a moving scale which is a blackboard or wall. The device can be connected with a multimeter used for measuring micro electromotive force. The reflecting mirror is driven to rotate by the rotation of the pointer and reflects laser to the blackboard or wall far away, the blackboard or wall is marked with scale labels used for measurement, or the laser can be directly read through the fixed scale arranged at the right front part of the case. The invention has long service life, low energy consumption, long projection distance, wide application range, low cost, simple structure, easy operation, small size, portability and easy maintenance and repair as well as popularization and application.

Description

technical field [0001] The invention relates to a scale, in particular to a laser projection scale system. Background technique [0002] At present, in a prior art, laser light emitted from a laser source is irradiated on a transmissive scale. By moving the transmissive scale, the polarization angle of the transmitted light changes according to the orientation of the 1 / 2 wavelength plates arranged in the longitudinal direction. The polarization angle is not easily affected by noise factors such as external light. Since the light intensity of the polarized component transmitted through the analyzer and detected by the photodetector changes according to the polarization angle, it changes with the movement of the transmissive scale, and the detection signal is output to the movement amount calculation means. If the movement amount is calculated based on this signal, an accurate movement amount can be detected. [0003] Another existing technology, the laser projector, can si...

AI Technical Summary

Problems solved by technology

[0006] 1. Since the telemetry laser scale of this prior art is not provided with a projection device, it cannot be used for optical amplification and projection, and its application range is narrow

[0007] 2. Since the telemetry laser scale of this prior art is provided with two parallel laser emitters, the cost is high and the structure is complicated, so it cannot be applied to the teaching classroom, and the experimental phenomenon is not intuitive enough.

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