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Optical encoder

An optical encoder and encoding technology, applied in optics, optical analog/digital converters, instruments, etc., can solve the problems of difficult optical encoders and high manufacturing costs of high-order ADCs, and achieve the effect of good market competitiveness

Pending Publication Date: 2021-07-16
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention discloses an optical encoder, which helps to solve the problem that high-order ADC manufacturing costs are too high, making it difficult for high-resolution optical encoders to be widely used in the industry

Method used

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Embodiment 1

[0043] ﹝Embodiment 1﹞

[0044] Embodiment 1 provides such as Figure 1 to Figure 6 The illustrated rotary optical encoder 1 includes a code disc 10 , a light detector 20 , a light source 30 and a sensing circuit 40 . The coding part 120 of the fine division area of ​​the code disc 10 has a plurality of slits 121 which are transparent and spaced apart from each other, and the width of the slits 121 can be 60 micrometers (μm), and the number of the slits 121 is 1024 in total. The specific width and quantity of the slits 121 are only for illustration, and will vary according to the resolution requirement of the subdivided coding portion 120 .

[0045] The photodetector 20 includes a plurality of photosensitive elements 230 located in the photosensitive block 210 of the coding area and the photosensitive block 220 of the subdivision area. The photosensitive elements 230 located in the photosensitive block 220 of the subdivided area are arranged to form a plurality of trapezoidal...

Embodiment 2

[0048] ﹝Embodiment 2﹞

[0049] Embodiment 2 provides a rotary optical encoder 1 , including an encoder disc 10 , a light detector 20 , a light source 30 and a sensing circuit 40 . The coding part 120 of the fine division area of ​​the coding disk 10 has a plurality of slits 121 which are transparent and spaced apart from each other. The number of slits 121 is 1024 in total.

[0050] The photodetector 20 includes a plurality of photosensitive elements 230 located in the photosensitive block 210 of the coding area and the photosensitive block 220 of the subdivision area. The photosensitive elements 230 located in the photosensitive block 220 of the subdivided area are arranged to form a plurality of trapezoidal photosensitive arrays 240 , and eight adjacent photosensitive arrays 240 form a photosensitive array group 250 . Any photosensitive array 240 includes 2960 photosensitive elements 230 arranged in 25 rows. The bottom row of the photosensitive array 240 contains 7 photos...

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Abstract

An optical encoder comprises an encoding disc and an optical detector which are correspondingly arranged. The optical detector is used for receiving light. The optical detector comprises at least one light sensing assembly, and the light sensing assemblies are arranged to form at least one light sensing array. The width of the light sensing array corresponds to a fine division period of the optical encoder.

Description

technical field [0001] The present invention relates to an encoder, especially an optical encoder with high resolution. Background technique [0002] The encoder uses optical, magnetic or mechanical contacts to sense the position, converts the position into an electrical signal, and outputs it to the driver as a feedback signal when the driver controls the position. According to the motion mode, it can be divided into rotary encoder or linear encoder. Rotary encoders can convert the rotational position or amount of rotation into analog or digital electrical signals, and are generally installed on rotating objects, such as motor shafts. Linear encoders convert linear position or linear displacement into electrical signals in a similar manner. At present, encoders are widely used in machine tools, robots, and semiconductor equipment as sensing modules for servo motor positioning, and the accuracy of encoders will directly affect the positioning performance of mechanical equi...

Claims

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Application Information

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IPC IPC(8): G01D5/347G02F7/00
CPCG01D5/34707G02F7/00G01D5/34715H03M1/245H03M1/202G01D5/3473H03M1/068G01D5/24438
Inventor 罗英哲周明杰李耀辉陈易呈
Owner IND TECH RES INST
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