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Two dimensional raler reading head mechanism

A two-dimensional ruler and reading head technology, which is applied to measuring devices, instruments, optical devices, etc., can solve the problems such as the inability to fix the diffractive mirror base group 4, the measurement error of the two-dimensional ruler, and the angle is not easy to be the same.

Active Publication Date: 2008-07-09
IND TECH RES INST
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Problems solved by technology

However, the diffractive mirror base group 4 is fixed in a fixed frame (not shown), and is fixed by locking or processing, and is fixed with manual correction. Not only the optical axes between several diffractive mirror base groups 4 The included angle with the first incident light 1 is not easy to be the same, and it is easy to produce errors when trying to obtain the best first diffraction angle θ, and it is impossible to effectively fix the diffraction mirror base group 4 in the fixed frame, which will Causes errors in the measurement of the two-dimensional ruler, which is not what the user wants to see

Method used

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  • Two dimensional raler reading head mechanism

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Embodiment Construction

[0030] refer to image 3 , 4 And 5, the two-dimensional ruler reading head mechanism of the present invention includes: a plurality of diffractive mirror base groups 14, a hollow cone 16, a mirror base group fixing base 17, and a light source base 18. The number of the multi-diffraction mirror base group 14 is preferably three, and its function is the same as that of the known multi-diffraction mirror base group 4 , which will not be described here. The light source base 18 is used to fix the light source generator (not shown) and the mirror base set fixing base 17 . Mirror base group fixing seat 17 has many planes 72,73 and 74, can be used for coupling to the first plane of single diffraction mirror base group 14 respectively, and the coupling mode of plane and the first plane of diffraction mirror base group can be It may be snap-fit, lock-fit, fit, etc., preferably lock-fit. The fixing base 17 of the mirror base group further has a circular hole 171 for accommodating the...

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Abstract

The 2D ruler reading head includes lens combination fixer, hollow cone, diffraction lens bases and light source seat. The hollow cone has angle between the conic surface and central line to constitute diffraction angle, and the diffraction lens bases are located with the hollow cone to the same angle to the central line of the hollow cone. The present invention has low cost for maintaining the same angle of the diffraction lens bases and less angle error.

Description

technical field [0001] The invention relates to a two-dimensional ruler reading head mechanism, in particular to a two-dimensional ruler reading head mechanism suitable for measuring the movement amount in two-dimensional direction. Background technique [0002] The two-dimensional ruler is a measuring element for two-dimensional movement, which mainly includes a two-dimensional grating ruler and a two-dimensional ruler reading head mechanism. The two-dimensional grating ruler and the reading head of the two-dimensional ruler are respectively fixed on the two objects that are about to move relative to each other. When the two objects move relative to each other, the two-dimensional ruler can read the distance of the relative movement of the two objects. For the principle, please refer to Taiwan Patent Publication No. 479125, the title of which is "A Conjugate Optical Path Type Two-Dimensional Displacement Measuring Method", which will be briefly explained below. [0003] Su...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/245G01B9/00G01B11/00
Inventor 林庆芳高清芬张中柱
Owner IND TECH RES INST
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