A matte surface graticule, optical device

Abstract

The utility model provides a kind of rough surface dividing plate, optical device, it is related to optical technology field to solve the technical problem that rough surface dividing plate dividing figure is not clear. The rough surface dividing plate, rough surface dividing plate includes glass base layer, dividing layer and flat glass layer simultaneously with dividing and white wall background effect, dividing layer includes the plurality of dividing line formed on glass base layer, dividing layer is located between glass base layer and flat glass layer;Dividing plate further includes the adhesive layer formed between glass base layer and flat glass layer, and glass base layer and flat glass layer are connected by adhesive layer bonding;The roughness of the surface of glass base layer away from dividing layer, the roughness of the surface of flat glass layer away from dividing layer respectively are Ra1.6 μm~Ra3.2 μm. The rough surface dividing plate is projected in laser spot on the dividing plate, and the dividing figure is clearer while the dividing plate has the white wall background effect.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a textured reticle and an optical device. Background Technology

[0002] In the field of optics, there is a type of reticle element that, when a laser spot is projected onto it, not only serves a reticle function but also acts as a white background. A white background, like a white wall, uniformly diffuses the laser light, forming a bright and visible background that facilitates observation of the laser spot or reticle pattern. Therefore, the surface of the reticle element needs to be rough, possessing a certain degree of roughness.

[0003] Conventional reticle elements are made by creating reticle patterns on a polished glass surface, and then roughening the polished surface. After roughening, the reticle patterns become blurry or incomplete. Utility Model Content

[0004] The purpose of this invention is to provide a textured reticle and an optical device to solve the technical problem of unclear reticle patterns on textured reticles.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] In a first aspect, the present invention provides a matte reticle that serves as both a reticle and a white wall background. The reticle includes a glass base layer, a reticle layer, and a flat glass layer. The reticle layer includes multiple reticle lines formed on the glass base layer and is disposed between the glass base layer and the flat glass layer.

[0007] The reticle also includes an adhesive layer formed between the glass substrate and the flat glass layer, wherein the glass substrate and the flat glass layer are bonded together by the adhesive layer;

[0008] The surface roughness of the glass substrate facing away from the grading layer and the surface roughness of the flat glass layer facing away from the grading layer are both Ra1.6μm~Ra3.2μm.

[0009] According to at least one embodiment of the present invention, the ratio of the thickness of the glass substrate to the thickness of the flat glass layer ranges from 22 to 26.

[0010] According to at least one embodiment of the present invention, the adhesive layer is made of transparent GBN-501 photosensitive adhesive.

[0011] According to at least one embodiment of the present invention, the surface of the glass substrate facing the flat glass layer is a polished surface, and the roughness of the polished surface is Ra0.01μm~Ra0.02μm.

[0012] According to at least one embodiment of the present invention, the dividing line is a chrome-plated line formed on the polished surface of the glass substrate.

[0013] According to at least one embodiment of the present invention, the line width of the reticle ranges from 0.03mm to 0.035mm.

[0014] According to at least one embodiment of this utility model, the thickness of the glass substrate ranges from 4.75 mm to 4.85 mm; and / or,

[0015] The thickness of the flat glass layer ranges from 0.18 mm to 0.22 mm; and / or,

[0016] The total thickness of the reticle ranges from 4.9 mm to 5.1 mm.

[0017] According to at least one embodiment of the present invention, the glass substrate and the flat glass layer are of the same size and material.

[0018] According to at least one embodiment of the present invention, the dividing layer includes two first line segments and four second line segments, wherein the length of the first line segment is greater than the length of the second line segment;

[0019] The reticle is square in shape, and the two first line segments are arranged in a cross shape with the intersection point located at the center of the square.

[0020] Each pair of the second line segments crosses over the corresponding first line segment near its two ends.

[0021] Secondly, this utility model provides an optical device, including the reticle described in the first aspect.

[0022] In one or more technical solutions provided in the exemplary embodiments of this utility model, at least one of the following beneficial effects can be achieved.

[0023] The textured reticle of this invention, as an exemplary embodiment, includes a glass substrate, a reticle layer, and a flat glass layer. Multiple reticle lines of the reticle layer (reticle pattern) are formed on the surface of the glass substrate. The flat glass layer is then bonded to the reticle-lined surface of the glass substrate using an adhesive layer. The surface of the flat glass layer facing away from the reticle layer is then roughened to create a certain degree of roughness. Similarly, the surface of the glass substrate facing away from the reticle layer can also be roughened to create a certain degree of roughness, for example, Ra 1.6 μm to Ra 3.2 μm for the two surfaces. Based on this, the reticle layer can be preserved during the roughening process, ensuring the reticle pattern remains clearly visible while creating a textured surface. When a laser spot is projected onto the reticle, it provides a white background while simultaneously enhancing the clarity of the reticle pattern. Attached Figure Description

[0024] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0025] Figure 1 This is a cross-sectional structural schematic diagram of the reticle according to an embodiment of the present invention;

[0026] Figure 2 This is a side view of the reticle according to an embodiment of the present invention.

[0027] Figure 3 This is a front view structural schematic diagram of the reticle according to an embodiment of the present utility model;

[0028] Figure 4 This is a physical image of the reticle from Example 1;

[0029] Figure 5 This is a physical image of the reticle from Example 2.

[0030] Figure label:

[0031] 10. Glass substrate; 11. Third surface; 12. Second surface;

[0032] 20. Adhesive layer;

[0033] 30. Flat glass layer; 31. First surface;

[0034] 40. Divide into layers; 41. First line segment; 42. Second line segment. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] In related technologies, a reticle element with a rough surface needs to simultaneously function as a reticle and a white background when a laser spot is projected onto it. The surface of this reticle element must be rough. If the reticle pattern is fabricated on a rough surface, the uneven microstructure makes processing the reticle pattern extremely difficult. Alternatively, if grooves are etched into a polished glass surface to create a filler to form the reticle pattern, and then the surface is roughened, the reticle pattern will become blurry or incomplete.

[0037] To address the aforementioned issues, the exemplary embodiment of this utility model provides a rough-surface reticle plate. First, a reticle pattern is formed on the polished surface of a glass substrate. Then, a flat glass is covered on top of it. Afterward, the outer surface of the flat glass is roughened, thereby creating a rough surface on the base surface where the reticle pattern is clear, thus serving as a background for a white wall.

[0038] Figure 3 This is a front view structural diagram of the reticle according to an embodiment of the present invention. For example... Figure 3 As shown, in the textured reticle provided in the exemplary embodiment of this utility model, the reticle pattern formed by multiple reticle lines in the reticle layer 40 can be, for example, two first line segments 41 and four second line segments 42. The length of the first line segment 41 is greater than the length of the second line segment 42. The shape of the reticle is square, and the two first line segments 41 are arranged in a cross shape with the intersection point located at the center point of the square. Each pair of second line segments 42 spans across the corresponding first line segment 41 near its two ends.

[0039] In practical applications, the reticle is square in shape, meaning that the outlines of both the glass substrate 10 and the flat glass layer 30 are square and of the same size. Two longer first segments 41 of the multiple reticles form intersecting crosshairs, with the intersection point of the crosshairs located at the center of the square. Each first segment 41 is parallel to two opposite edges of the square and perpendicular to the other two opposite edges. Each second segment 42 is positioned near the end of the corresponding first segment 41, resulting in two second segments 42 near the ends of each first segment 41. The second segments 42 and the first segments 41 form smaller crosshairs, thus forming four smaller crosshairs in total. Based on this, a large crosshair and four smaller crosshairs distributed around it together constitute the reticle pattern, forming the reticle layer 40 on the third surface 11 of the glass substrate 10.

[0040] Figure 1This is a cross-sectional structural schematic diagram of the reticle according to an embodiment of the present invention; Figure 2 This is a side view structural schematic diagram of the reticle according to an embodiment of the present invention. (In conjunction with...) Figure 1 and Figure 2 As shown, the reticle provided in the exemplary embodiment of this utility model includes a glass base layer 10, a reticle layer 40, and a flat glass layer 30. The reticle layer 40 includes multiple reticle lines formed on the glass base layer 10 and is disposed between the glass base layer 10 and the flat glass layer 30. The reticle also includes an adhesive layer 20 formed between the glass base layer 10 and the flat glass layer 30, and the glass base layer 10 and the flat glass layer 30 are bonded together by the adhesive layer 20. The surface roughness of the glass base layer 10 away from the reticle layer 40 and the surface roughness of the flat glass layer 30 away from the reticle layer 40 are Ra1.6μm to Ra3.2μm, respectively.

[0041] In practical applications, the glass substrate 10 is formed by rough grinding of a glass blank, with an external dimension of 54mm×54mm. The surface is rough ground with diamond abrasive to form two surfaces with a roughness of Ra1.6μm to Ra3.2μm. One of the surfaces is polished to form the third surface 11 of the glass substrate 10, and the unpolished surface is the second surface 12 of the glass substrate 10.

[0042] Chromium is plated on the third surface 11 of the glass substrate 10, and then a reticle layer 40 is formed on the third surface 11 by photolithography using positive photoresist (BP218) and a mask.

[0043] A flat glass layer 30 with an outer dimension of 54mm × 54mm is bonded to the third surface 11 using adhesive layer 20. That is, the adhesive layer 20 fills the space between the glass base layer 10 and the flat glass layer 30, and firmly bonds the two together.

[0044] Finally, the surface of the flat glass layer 30 is rough-ground with diamond abrasive to form a first surface 31 with a roughness of Ra1.6μm to Ra3.2μm.

[0045] It should be noted that the first surface 31 is the surface of the flat glass layer 30 facing away from the reticle layer 40, and is also one surface of the entire reticle; the second surface 12 is the surface of the glass base layer 10 facing away from the reticle layer 40, and is another surface of the entire reticle; the third surface 11 is the polished surface on the glass base layer 10 on which the reticle pattern is formed.

[0046] For example, the roughness of the surface of the glass substrate 10 facing away from the grading layer 40 (second surface 12) can be Ra1.6μm, Ra1.8μm, Ra2μm, Ra2.2μm, Ra2.4μm, Ra2.6μm, Ra2.8μm, Ra3μm, Ra3.2μm or within any two of the above values.

[0047] For example, the roughness of the surface of the flat glass layer 30 facing away from the reticle layer 40 (first surface 31) can be Ra1.6μm, Ra1.8μm, Ra2μm, Ra2.2μm, Ra2.4μm, Ra2.6μm, Ra2.8μm, Ra3μm, Ra3.2μm or within any two of the above values.

[0048] For example, the ratio of the thickness of the glass substrate 10 to the thickness of the flat glass layer 30 is in the range of 22 to 26, such as 22, 22.5, 23, 23.5, 24, 24.5, 25, 25.5, 26 or any two of the above values.

[0049] For example, the thickness of the glass substrate 10 can range from 4.75mm to 4.85mm, such as 4.75mm, 4.76mm, 4.77mm, 4.78mm, 4.79mm, 4.8mm, 4.81mm, 4.82mm, 4.83mm, 4.84mm, 4.85mm, or any two of the above values.

[0050] The thickness of the flat glass layer 30 ranges from 0.18mm to 0.22mm, for example, it can be 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm or any two of the above values. Within this thickness range, it can avoid the problem of unclear reticle patterns due to excessive thickness, and the problem of easy breakage of flat glass due to excessive thinness.

[0051] The total thickness of the reticle (the total thickness of the glass base layer 10, the adhesive layer 20, and the flat glass layer 30) ranges from 4.9 mm to 5.1 mm, for example, it can be 4.9 mm, 4.92 mm, 4.94 mm, 4.96 mm, 4.98 mm, 5 mm, 5.02 mm, 5.04 mm, 5.06 mm, 5.08 mm, 5.1 mm, or any two of the above values.

[0052] Continue as Figure 1As shown, adhesive layer 20 is made of transparent GBN-501 photosensitive adhesive. GBN-501 photosensitive adhesive is a two-component, UV-curable optical adhesive, mainly composed of epoxy acrylic photosensitive resin and a photosensitizer. It is widely used in the bonding of optical lenses and prisms, as well as the structural bonding of precision optical instruments. It has a light transmittance >90% and a refractive index (after curing) of 1.55, making it suitable for reticles requiring high transparency. When adhesive layer 20 is used to bond the glass substrate 10 and the flat glass layer 30, the strength and transparency are sufficient to meet the requirements of the reticle.

[0053] Combination Figure 2 and Figure 3 As shown, in order to meet the requirement that the reticle lines of the reticle are clearly visible, the surface of the glass substrate 10 facing the flat glass layer 30 (the third surface 11) is a polished surface. The roughness of the polished surface is Ra0.01μm to Ra0.02μm, for example, it can be Ra0.011μm, Ra0.012μm, Ra0.013μm, Ra0.014μm, Ra0.015μm, Ra0.016μm, Ra0.017μm, Ra0.018μm, Ra0.019μm or any two of the above values.

[0054] Continue as Figure 3 As shown, the textured reticle plate provided in the exemplary embodiment of this utility model has a reticle line width ranging from 0.03mm to 0.035mm. That is, the line width of both the first line segment 41 and the second line segment 42 can be between 0.03mm and 0.035mm, for example, 0.03mm, 0.031mm, 0.032mm, 0.033mm, 0.034mm, 0.035mm, or any two of the above values. Within this line width range, the problem of unclear reticle patterns caused by excessively thin line widths can be avoided.

[0055] like Figure 1 As shown, the frosted reticle glass base layer 10 and the flat glass layer 30 provided in the exemplary embodiment of this utility model have the same size and material. For example, the glass base layer 10 and the flat glass layer 30 are both made of colorless optical glass.

[0056] An exemplary embodiment of this utility model also provides an optical device, including the textured reticle of the above embodiment.

[0057] For example, optical devices can be gun sights, telescopes, optical pods, etc.

[0058] Compared to the prior art, the advantages of the optical device in the exemplary embodiment of this utility model are the same as those of the textured reticle, and will not be repeated here.

[0059] Example 1

[0060] The rough-surface reticle has an external dimension of 54mm×54mm, a total thickness of 5mm±0.1mm, a surface roughness of Ra1.6μm, and a reticle line width of 0.03mm~0.035mm.

[0061] Cold working of glass substrate 10: The glass substrate is roughly ground to shape, with the external dimensions controlled at 54mm × 54mm. Both surfaces are then roughly ground with W40 diamond abrasive to control the roughness Ra 1.6μm and the thickness. Then, polish one of the surfaces, controlling the thickness to 4.8mm ± 0.05mm, and record the measured thickness.

[0062] Creating the reticle pattern: Chromium is plated on the polished surface (third surface 11) of the glass substrate, and then the reticle pattern is created on the polished surface using a photolithography process with positive photoresist (BP218) and a mask.

[0063] Bonding: Use photosensitive adhesive (GBN-501) to bond a flat glass blank (of the same material as the glass substrate) with a shape of 54mm×54mm and a thickness of 2.5mm±0.1mm to the dividing surface, and then cure it.

[0064] Final shaping: The outer surface of the flat glass blank (first surface 31) is coarsely ground with W40 diamond abrasive to control the surface roughness Ra 1.6μm, the thickness of the flat glass is controlled at 0.2mm ± 0.02mm and the total thickness of the reticle is controlled at 5mm ± 0.1mm.

[0065] Inspection indicators: thickness 5.07mm, line width 0.032mm, surface roughness Ra 1.6μm, clearly visible reticle pattern, meeting all requirements. Figure 4 As shown, where, Figure 4 This is a physical image of the reticle from Example 1.

[0066] Example 2

[0067] The rough-surface reticle has dimensions of 54mm×54mm, a thickness of 5mm±0.1mm, a surface roughness of Ra3.2μm, and a reticle line width of 0.03mm~0.035mm.

[0068] Cold working of glass substrate 10: The glass substrate is roughly ground to shape, with the outer dimensions controlled at 54mm × 54mm. Both surfaces are then roughly ground with 240# diamond abrasive, controlling the roughness Ra to 3.2μm and the thickness to 4.9mm. One surface is then polished, controlling the thickness to 4.8mm ± 0.05mm, and the measured thickness is recorded.

[0069] Creating the reticle pattern: Chromium is plated on the polished surface (third surface 11) of the glass substrate, and then the reticle pattern is created on the polished surface using a photolithography process with positive photoresist (BP218) and a mask.

[0070] Bonding: Use photosensitive adhesive (GBN-501) to bond a flat glass blank (of the same material as the glass substrate) with a shape of 54mm×54mm and a thickness of 2.5mm±0.1mm to the dividing surface, and then cure it.

[0071] Final shaping: The outer surface of the flat glass blank (first surface 31) is coarsely ground with 240# diamond abrasive to control the surface roughness Ra 3.2μm, the thickness of the flat glass is controlled at 0.2mm±0.02mm and the total thickness of the reticle is controlled at 5mm±0.1mm.

[0072] Inspection indicators: thickness 5.05mm, line width 0.033mm, surface roughness Ra3.2μm, clearly visible reticle pattern, meeting all requirements. Figure 5 As shown, where, Figure 5 This is a physical image of the reticle from Example 2.

[0073] As can be seen from the above, the rough-surface reticle produced by the above method of this utility model, when installed in an optical product system for observation, has a clear and distinguishable reticle pattern, which well meets the accuracy and surface rough-surface requirements of the optical product system, and greatly reduces the processing difficulty and production cost.

[0074] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A textured dividing plate, characterized in that, It also serves as a divider and a white wall background. The divider includes a glass base, a divider layer, and a flat glass layer. The divider layer includes multiple divider lines formed on the glass base. The divider layer is located between the glass base and the flat glass layer. The reticle also includes an adhesive layer formed between the glass substrate and the flat glass layer, wherein the glass substrate and the flat glass layer are bonded together by the adhesive layer; The surface roughness of the glass substrate facing away from the grading layer and the surface roughness of the flat glass layer facing away from the grading layer are both Ra1.6μm~Ra3.2μm.

2. The reticle according to claim 1, characterized in that, The ratio of the thickness of the glass substrate to the thickness of the flat glass layer ranges from 22 to 26.

3. The reticle according to claim 2, characterized in that, The adhesive layer is made of transparent GBN-501 photosensitive adhesive.

4. The reticle according to claim 3, characterized in that, The surface of the glass substrate facing the flat glass layer is a polished surface, and the roughness of the polished surface is Ra0.01μm~Ra0.02μm.

5. The reticle according to claim 4, characterized in that, The dividing line is a chrome-plated line formed on the polished surface of the glass substrate.

6. The reticle according to claim 4, characterized in that, The width of the reticle ranges from 0.03mm to 0.035mm.

7. The reticle according to claim 4, characterized in that, The thickness of the glass substrate ranges from 4.75mm to 4.85mm; and / or, The thickness of the flat glass layer ranges from 0.18 mm to 0.22 mm; and / or, The total thickness of the reticle ranges from 4.9 mm to 5.1 mm.

8. The reticle according to any one of claims 1-7, characterized in that, The glass substrate and the flat glass layer are the same in size and material.

9. The reticle according to claim 8, characterized in that, The dividing layer includes two first line segments and four second line segments, wherein the length of the first line segment is greater than the length of the second line segment; The reticle is square in shape, and the two first line segments are arranged in a cross shape with the intersection point located at the center of the square. Each pair of the second line segments crosses over the corresponding first line segment near its two ends.

10. An optical device, characterized in that, Includes the reticle as described in any one of claims 1-9.

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