Double-sided glass code disc

Abstract

The utility model discloses a double-sided glass code disc, which comprises an oxide layer, a shading layer, a first base layer, a first reflecting layer, a glass substrate layer, a second reflecting layer and a second base layer which are sequentially arranged from top to bottom, the thickness of the oxide layer is 36-44nm, the thickness of the shading layer is 85-90nm, and the reflectivity of the first reflecting layer is different from that of the second reflecting layer. Through the above structure, code channels can be arranged on the top surface and the bottom surface of the glass substrate layer, and a high-reflection code disc and a low-reflection code disc can be respectively realized on one glass substrate layer through the difference between the reflectivity of the first reflection layer and the reflectivity of the second reflection layer.

Description

Technical Field

[0001] The utility model relates to the technical field of photoelectric measuring elements, in particular to a double-sided glass code disk. Background Art

[0002] As we all know, photoelectric encoders are sensors for motion control. They mainly convert information into electrical signals and then feed them back to various motion control devices to enable them to complete their work. Glass code disks are an important part of photoelectric encoders and can be used to measure angular displacement. The existing glass code disk graphics are determined by the code system and structure of the photoelectric encoder. The code systems currently used by the code disk are mainly divided into: binary code, decimal code, sexagesimal code, and reg code.

[0003] The existing glass code disk is mainly made by the following process: first, a chromium film layer is sputtered on the two end surfaces of the glass substrate, and then a photosensitive photoresist film is coated on the chromium film layer, and after the exposure / development / etching / removal of the photoresist film process, a code disk with corresponding patterns on both sides is obtained. However, the existing glass code disk has the following defects: the existing glass code disk has only one code track, and the utilization rate is not high enough.

[0004] Therefore, a double-sided glass code disk is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims at solving the current technical deficiencies and provides a double-sided glass code disk.

[0006] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0007] A double-sided glass code disk comprises an oxide layer, a shading layer, a first base layer, a first reflective layer, a glass substrate layer, a second reflective layer and a second base layer arranged in sequence from top to bottom, wherein the oxide layer has a thickness of 36-44 nm, the shading layer has a thickness of 85-90 nm, and the reflectivity of the first reflective layer is different from the reflectivity of the second reflective layer.

[0008] As a further improvement, the thickness of the first primer layer is 40-45 nm, and the thickness of the first reflective layer is 20-21 nm.

[0009] As a further improvement, the thickness of the second reflective layer is 70-80 nm, and the thickness of the second primer layer is 10-20 nm.

[0010] As a further improvement, the refractive index of the glass substrate layer is 1.5-1.52, and the light transmittance of the glass substrate layer is greater than 90%.

[0011] As a further improvement, the reflectivity of the oxide layer is less than 3%.

[0012] As a further improvement, the reflectivity of the second reflective layer is greater than 50%.

[0013] As a further improvement, the reflectivity of the first reflective layer is less than 5%.

[0014] Beneficial effects of the utility model: A double-sided glass code disk of the utility model comprises an oxide layer, a light shielding layer, a first bottom layer, a first reflective layer, a glass substrate layer, a second reflective layer and a second bottom layer arranged in sequence from top to bottom, the oxide layer has a thickness of 36-44nm, the light shielding layer has a thickness of 85-90nm, and the reflectivity of the first reflective layer is different from the reflectivity of the second reflective layer. Therefore, the utility model can be provided with code channels on both the top and bottom surfaces of the glass substrate layer through the above structure, and a high-reflection code disk and a low-reflection code disk can be respectively realized on one glass substrate layer through the difference in reflectivity of the first reflective layer and the second reflective layer.

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the double-sided glass code disk of the utility model. DETAILED DESCRIPTION

[0017] The following description is only a preferred embodiment of the present invention and does not limit the protection scope of the present invention.

[0018] Please refer to Figure 1 A double-sided glass code disk 100 of the utility model comprises an oxide layer 10, a light shielding layer 20, a first coating layer 30, a first reflective layer 40, a glass substrate layer 50, a second reflective layer 60 and a second coating layer 70 arranged in sequence from top to bottom. The oxide layer 10 has a thickness of 36-44 nm, the light shielding layer 20 has a thickness of 85-90 nm, and the reflectivity of the first reflective layer 40 is different from the reflectivity of the second reflective layer 60. Specifically, the thickness of the first coating layer 30 is 40-45 nm, and the thickness of the first reflective layer 40 is 20-21 nm. More specifically, the thickness of the second reflective layer 60 is 70-80 nm, and the thickness of the second coating layer 70 is 10-20 nm.

[0019] Please continue to refer to Figure 1, the refractive index of the glass substrate layer 50 is 1.5-1.52, and the light transmittance of the glass substrate layer 50 is greater than 90%. Preferably, the reflectivity of the oxide layer 10 is less than 3%. For example, as a preferred embodiment of the present invention, the reflectivity of the second reflective layer 60 is greater than 50%, and the reflectivity of the first reflective layer 40 is less than 5%, but it is not limited thereto.

[0020] The following is the production process of the double-sided glass code disk 100 of the utility model: the first step is to select a suitable square glass substrate, which must meet the following requirements: the squareness is 0.001 / inch, the thickness tolerance of the glass substrate is ±0.1mm, the refractive index is 1.514, the transmittance is greater than 90%, the softening point is greater than 630℃, and the thermal expansion coefficient is less than 100*10-7 / ℃; the second step is to clean and dry the glass substrate in an ultrasonic cleaning machine and then move it to the monomer evaporation coating workshop to coat the a surface of the glass substrate. Install it on an umbrella-shaped coating frame, coat the first reflective layer 40 by monomer evaporation coating, evacuate the monomer evaporation coating machine to a vacuum degree of 3.0E-3Pa, and set the temperature to 200-300°. Pass 25-30% oxygen, 8-10% argon, and titanium to coat the first layer of the first reflective layer 40; pass 15-20% oxygen, 8-10% argon, and carbon again to coat the second layer of the first reflective layer 40; alternately coat titanium / carbon for a total of 6 layers, so that the film thickness of the first reflective layer 40 reaches 20-21nm , the transmittance reaches 95%; the third step is to draw vacuum through the magnetron sputtering coating machine, the vacuum degree reaches 2.5E-3Pa, the temperature is 150-200°, the power is 5500-8000W, 70-90% nitrogen and 10-30% oxygen are introduced, and the first base layer 30 is deposited with a film thickness of 40-45nm; the fourth step is to introduce 75-95% nitrogen to deposit the light shielding layer 20 with a film thickness of 85-90nm; the fifth step is to introduce 70-90% nitrogen and 10-30% oxygen to deposit the oxide layer 10, the film The thickness is 36-44nm, and the reflectivity is less than 3%; in the sixth step, after taking the glass substrate out of the coating machine, turn it over to the b side facing down and place it in the coating plate rack, the vacuum degree reaches 2.5E-3Pa, the temperature is 150-200°, the power is 5500-8000W, 70-90% nitrogen and 10-30% oxygen are introduced, and the second reflective layer 60 is deposited with a film thickness of 10-20nm; in the seventh step, 69-92% nitrogen and argon are introduced to deposit the second base layer 70 with a film thickness of 70-80nm and a reflectivity of more than 50%.

[0021] Beneficial effects of the utility model: A double-sided glass code disk 100 of the utility model comprises an oxide layer 10, a light shielding layer 20, a first bottom layer 30, a first reflective layer 40, a glass substrate layer 50, a second reflective layer 60 and a second bottom layer 70 arranged in sequence from top to bottom, the oxide layer 10 has a thickness of 36-44 nm, the light shielding layer 20 has a thickness of 85-90 nm, and the reflectivity of the first reflective layer 40 is different from the reflectivity of the second reflective layer 60. Therefore, the utility model can be provided with code tracks on both the top and bottom surfaces of the glass substrate layer 50 through the above structure, and a high-reflection code disk and a low-reflection code disk can be realized on one glass substrate layer 50 through the different reflectivity of the first reflective layer 40 and the second reflective layer 60.

[0022] The present invention is not limited to the above-mentioned embodiments. Other double-sided glass code disks obtained by using the same or similar structures or devices as the above-mentioned embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. A double-sided glass code disk, characterized in that: It includes an oxide layer, a shading layer, a first base layer, a first reflective layer, a glass substrate layer, a second reflective layer and a second base layer, which are arranged in sequence from top to bottom. The thickness of the oxide layer is 36-44nm, the thickness of the shading layer is 85-90nm, and the reflectivity of the first reflective layer is different from the reflectivity of the second reflective layer.

2. The double-sided glass code disk according to claim 1, characterized in that: The thickness of the first coating layer is 40-45 nm, and the thickness of the first reflective layer is 20-21 nm.

3. The double-sided glass code disk according to claim 2, characterized in that: The thickness of the second reflective layer is 70-80 nm, and the thickness of the second primer layer is 10-20 nm.

4. The double-sided glass code disk according to claim 3, characterized in that: The refractive index of the glass substrate layer is 1.5-1.52, and the light transmittance of the glass substrate layer is greater than 90%.

5. The double-sided glass code disk according to claim 4, characterized in that: The reflectivity of the oxide layer is less than 3%.

6. The double-sided glass code disk according to claim 5, characterized in that: The reflectivity of the second reflective layer is greater than 50%.

7. The double-sided glass code disk according to claim 6, characterized in that: The reflectivity of the first reflective layer is less than 5%.

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