Code disc for reflective encoder

Abstract

The utility model discloses a code disc for a reflective encoder, which relates to the technical field of encoder equipment and comprises a glass code disc, a low-reflection film is fixedly connected to the surface of the glass code disc, and a high-reflection film is fixedly connected to one side, far away from the glass code disc, of the low-reflection film. The low-reflection film is formed by plating acid-resistant alkali metal and metal oxide through a vacuum coating machine, the acid-resistant alkali metal comprises niobium, molybdenum, tantalum and hafnium, one of the niobium, the molybdenum, the tantalum and the hafnium is short for H, the metal oxide comprises sio2, sio, al2o3 and zro2, one of the sio, the al2o3 and the zro2 is short for L, and the plating sequence of the acid-resistant alkali metal and the metal oxide is LHLHLHLHLHL, and after the thickness of each layer of the acid-resistant alkali metal and the metal oxide is optimized, the thickness range is 10-150nm, so that the problems that the performance of a traditional material cannot reach an ideal level and the overall effect and the accuracy of equipment are reduced when the traditional glass code disc is in a working environment under high-intensity light or in a scene requiring high reflectivity are solved.

Description

Technical Field

[0001] This utility model relates to the field of encoder equipment technology, specifically a code disk for a reflective encoder. Background Technology

[0002] Encoder disks record and transmit rotational position information through optical, magnetic, or mechanical means. A code disk is a circular or arc-shaped disc with a series of equidistant lines or protrusions. These lines or protrusions represent position information, which can be determined by detection and measurement. Currently, various types of code disks are used in various fields, such as optical instruments, laser equipment, and communication systems. Traditional code disks are usually made of glass or similar materials to reflect or transmit light to achieve specific functions.

[0003] However, in high-intensity light environments or scenarios requiring high reflectivity, the performance of traditional glass encoders cannot reach the ideal level, which will reduce the overall effect and accuracy of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a code disk for a reflective encoder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a code disk for a reflective encoder, comprising a glass code disk, wherein a low-reflection film is fixedly connected to the surface of the glass code disk, and a high-reflection film is fixedly connected to the side of the low-reflection film away from the glass code disk, wherein the low-reflection film is formed by depositing acid and alkali resistant metals and metal oxides using a vacuum coating machine.

[0006] The acid and alkali resistant metals include niobium, molybdenum, tantalum, and hafnium; one of these four can be selected, abbreviated as H.

[0007] The metal oxides include one of the four: SiO2, SiO, Al2O3, and ZrO2, abbreviated as L.

[0008] Preferably, the plating sequence of the acid and alkali resistant metals and metal oxides is: LHLHLHLHLHL.

[0009] Preferably, the thickness of each layer of the acid and alkali resistant metal and metal oxide is optimized to be between 10-150 nm, achieving a visible light reflectance of less than 1% and a transmittance of less than 0.1%.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention utilizes a vacuum coating machine to deposit acid- and alkali-resistant metals and metal oxides to form a low-reflection film. The thickness of each layer of the acid- and alkali-resistant metals and metal oxides is optimized to range from 10 to 150 nm, achieving a visible light reflectance of less than 1% and a transmittance of less than 0.1%. The low-reflection film is not easily etched and has low reflectance, which helps improve the resolution of the application environment. It solves the problem that traditional glass code disks cannot achieve ideal performance in high-intensity light environments or scenarios requiring high reflectivity, thus reducing the overall effect and accuracy of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0014] Figure 3 This is a cross-sectional view of the present invention;

[0015] Figure 4 This is a schematic diagram of the stacked low-reflection film structure of this utility model;

[0016] Figure 5 This is a schematic diagram of the reflectance spectrum of the chrome-plated surface of this utility model;

[0017] Figure 6 This is a schematic diagram of the reflectance spectrum curve of the black coating layer of this utility model;

[0018] Figure 7 This is a schematic diagram of the transmittance spectrum curve of the black coating layer of this utility model.

[0019] In the diagram: 1. Glass code disk; 2. Low-reflection film; 3. High-reflection film. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-7 This utility model provides a technical solution: a code disk for a reflective encoder, including a glass code disk 1, a low-reflection film 2 fixedly connected to the surface of the glass code disk 1, a high-reflection film 3 fixedly connected to the side of the low-reflection film 2 away from the glass code disk 1, and the low-reflection film 2 is formed by coating acid and alkali resistant metals and metal oxides by a vacuum coating machine.

[0022] The acid and alkali resistant metals include niobium, molybdenum, tantalum, and hafnium; one of these four can be selected, abbreviated as H.

[0023] The metal oxides include one of the four: SiO2, SiO, Al2O3, and ZrO2, abbreviated as L;

[0024] The plating sequence of acid and alkali resistant metals and metal oxides is: LHLHLHLHLHL. After optimization, the thickness of each layer of acid and alkali resistant metals and metal oxides is between 10-150nm, achieving a visible light reflectance of less than 1% and a transmittance of less than 0.1%. The process of plating low-reflection film 2 and high-reflection film 3 on glass code disk 1 is: photoresist coating, photolithography exposure, photoresist development, wet etching, and laser cutting. High-reflection film 3 is easy to etch, while low-reflection film 2 is not easy to etch and has low reflectance, which is beneficial to improving the resolution of the application scenario.

[0025] Working principle: Low-reflection film 2 and high-reflection film 3 are deposited on glass code disk 1 by coating photoresist, photolithography exposure, photoresist development, wet etching, and laser cutting. After wet etching, high-reflection film 3 achieves the required pattern. Low-reflection film 2 is deposited by cross-layering acid and alkali resistant metals and metal oxides through a vacuum coating machine, so that the visible light reflectance is less than 1% and the transmittance is less than 0.1%. This solves the problem that the performance of traditional materials cannot reach the ideal level in working environments with high intensity light or in scenarios requiring high reflectivity, which would reduce the overall effect and accuracy of the equipment.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A code disk for a reflective encoder, comprising a glass code disk (1), characterized in that: A low-reflection film (2) is fixedly connected to the surface of the glass code disk (1), and a high-reflection film (3) is fixedly connected to the side of the low-reflection film (2) away from the glass code disk (1). The low-reflection film (2) is formed by coating acid and alkali resistant metals and metal oxides using a vacuum coating machine. The acid and alkali resistant metals include niobium, molybdenum, tantalum, and hafnium; one of these four can be selected, abbreviated as H. The metal oxides include one of the four: SiO2, SiO, Al2O3, and ZrO2, abbreviated as L.

2. The code disk for a reflective encoder according to claim 1, characterized in that: The plating sequence of the acid- and alkali-resistant metals and metal oxides is: LHLHLHLHLHL.

3. The code disk for a reflective encoder according to claim 1, characterized in that: The thickness of each layer of the acid and alkali resistant metal and metal oxide ranges from 10 to 150 nm, and the visible light reflectance is less than 1% and the transmittance is less than 0.1%.

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