Indicating grating and detector bonding device in reflective grating ruler
A technology for indicating gratings and detectors, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as the inability to realize the bonding between indicating gratings and detectors in reflective grating scales, and achieve reliable performance, reliability assurance, Mechanically compact effect
Inactive Publication Date: 2018-06-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0004] In order to solve the problem that the prior art cannot realize the bonding of the indicating grating and the detector in the reflective grating ruler, the present invention proposes a bonding device for the indicating grating and the detector in the reflective grating ruler
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Embodiment
[0025] Embodiment: set the angle between the indicating grating 3 and the circuit board 2 to be 20°, set the center of a pair of first marking patterns 2-1 on the circuit board 2 to be located at a position 0.7 mm away from the edge of the circuit board, and its size is uniform The width for both horizontal and vertical is 150um. The center of the second marking pattern 3-1 on the indicating grating 3 is located at a distance of 1.5 mm from the edge of the indicating grating, and the size of a pair of marking patterns is 80 um in the longitudinal line width, and 90 um in the longitudinal line width.
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The bonding device of indicating grating and detector in reflective grating scale belongs to the field of auxiliary adjustment of grating scale. In order to solve the problem that the existing technology cannot realize the bonding of indicating grating and detector in reflective grating scale, the circuit board is installed On the board, the detector is set on the circuit board, and the position of the detector is adjusted by the adjustment mechanism; the indicating grating is fixed on the support platform through the grating bracket, and is located directly below the circuit board; the support platform has a through hole, and the coaxial optical lens is located on the support Below the through hole of the platform, the coaxial optical lens is connected to the camera, and the camera is connected to the computer; the illumination source corresponds to the side optical hole of the coaxial optical lens; a pair of marking patterns and two pairs of marking patterns are respectively set on the circuit board and the indicating grating. Imaging on the camera through the coaxial optical lens, the adjustment mechanism is aligned with the two pairs of marking patterns, and the centers of the two pairs of imaging patterns are overlapped on the computer display to bond the indicating grating and detector; the stability of the device is guaranteed, and the accuracy of the experimental data is guaranteed. reliability.
Description
technical field [0001] The invention belongs to the field of auxiliary installation and adjustment of grating rulers, in particular to a bonding device for indicating gratings and detectors in reflective grating rulers. Background technique [0002] With the continuous improvement of positioning accuracy requirements in the field of machine tools, grating rulers have become an important tool for precise position measurement. The grating scale is composed of two parts: the main grating and the grating reading head. The grating reading head is further composed of a light source, a collimating optical system, an indicating grating, a detector and a mechanical casing. The basic principle of the grating scale is that the main grating and the index grating on the grating reading head form moiré fringes. When the lines on the index grating and the line lines on the scale grating form a small angle θ, and the facets of the two grating scales When placed relatively parallel, under t...
Claims
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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 孙竹张雪鹏刘阳孙强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI