Special-shaped shading ring for optical machine lens

Abstract

The embodiment of the utility model discloses a special-shaped shading ring for an optical machine lens, which comprises a shading ring connected to the surface of a lens of the optical machine lens, and the shading ring is provided with an opening. By implementing the special-shaped shading ring provided by the embodiment of the utility model, stray light with any radiation illumination intensity outside a view field can be effectively eliminated without being limited by other element structures, and the imaging quality and performance of optical equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shading rings, in particular to a special-shaped shading ring used for an optical machine lens. Background Art

[0002] In the process of using and producing optical equipment, in order to achieve clear and clean image effects, the stray light generated by the lens must be effectively reduced or eliminated. Stray light mainly achieves diffuse reflection of light by changing the reflection angle of light or increasing the roughness of the reflective surface, thereby weakening or eliminating light.

[0003] At present, the mainstream optical system adopts the following three methods to eliminate stray light; First, the inner wall of the lens barrel or the inner wall of the spacer is treated with black surface to reduce the reflectivity, thereby reducing the stray light generated by the reflection of light with weak radiant illumination. Second, the structure of the inner wall of the spacer is changed to adjust the reflection angle of the stray light so that the light cannot escape directly from the lens, thereby reducing the generation of stray light. Third, extinction patterns are added to the surface of the spacer or the side wall of the lens to increase the diffuse reflection effect of the light and effectively reduce the stray light generated by the reflection of light with strong radiant illumination. However, the current stray light elimination scheme has the following limitations: First, the surface blackening treatment can only effectively reduce the stray light generated by the reflection of light with weak radiant illumination, and the effect is limited for light with strong radiant illumination; changing the inner wall model of the spacer can improve the stray light reflection angle of various radiant illumination lights, but it is limited by the structure of the original; second, adding extinction patterns can effectively improve the extinction effect, but it is also impossible to completely eliminate the stray light generated by light with strong radiant illumination. In addition, the above methods can only process a single light beam at a time, and the cost of processing multiple components is high.

[0004] Therefore, it is necessary to design a new shading ring to effectively eliminate stray light of any radiation intensity outside the field of view without being restricted by other component structures, so as to improve the imaging quality and performance of optical equipment. Utility Model Content

[0005] The utility model aims to overcome the defects of the prior art and provide a special-shaped light shielding ring for an optical machine lens.

[0006] To solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: providing a special-shaped shading ring for an optical machine lens, comprising: a shading ring connected to the lens surface of the optical machine lens, and an opening is provided on the shading ring.

[0007] A further technical solution is that the opening is arranged at the center of the shading ring.

[0008] A further technical solution is: the opening is square.

[0009] A further technical solution is as follows: the opening is rectangular.

[0010] A further technical solution is that the shading ring is in close contact with the outer surface of the lens.

[0011] A further technical solution is as follows: the outer surface of the lens is a spherical surface, and the shading ring covers and is in close contact with the outer surface of the lens.

[0012] A further technical solution is as follows: one end of the lens is embedded in the lens barrel, and the other end of the lens is attached with the light shielding ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model includes a shading ring which is arranged in close contact with the surface of the lens, and an opening is provided on the shading ring for light within the field of view, thereby effectively eliminating stray light of any radiation illumination intensity outside the field of view without being restricted by other component structures, thereby improving the imaging quality and performance of the optical device.

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of a special-shaped shading ring for an optical machine lens provided in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the main structure of a special-shaped shading ring for an optical machine lens provided by an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the simulated frame field light before adding the shading ring provided in an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of a simulated frame field of view light after adding a light shielding ring provided in an embodiment of the utility model;

[0020] Description of the symbols in the figure:

[0021] 1. Lens barrel; 2. Lens; 3. Aperture ring; 4. Simulated light path tracing; 5. Frame field of view. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0024] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0025] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] See also Figure 1 , Figure 1 A structural schematic diagram of a special-shaped shading ring 3 for an optical machine lens provided in an embodiment of the utility model can be used in an optical machine lens to comprehensively eliminate stray light outside the optical machine frame and is applicable to light of any radiation illumination. It has low cost and can effectively eliminate stray light of any radiation illumination intensity outside the field of view without being restricted by other component structures, thereby improving the imaging quality and performance of optical equipment.

[0027] See also Figure 1 and Figure 2 A special-shaped shading ring 3 for an optical machine lens comprises: a shading ring 3 connected to the surface of a lens 2 of the optical machine lens, the shading ring 3 is made of aluminum or stainless steel, and the surface is anodized black to reduce the reflectivity of the shading ring; an opening is provided on the shading ring 3, specifically, the opening shape is a rectangle with pillow-shaped distortion, and the opening size can be adjusted according to the effective diameter of the light projected by the lens.

[0028] Specifically, the light of the optical machine lens is emitted from the lens 2 along the direction of the simulated light path tracing 4, and an image is projected on the frame field of view 5. A light shielding ring 3 close to the spherical surface is added to the surface of the lens 2. An opening is set on the light shielding ring 3 to pass the light in the field of view and intercept most of the stray light outside the field of view. The structure is simple, and there is no need to consider the processing method restrictions of other original parts; and it is suitable for eliminating stray light outside any field of view.

[0029] In one embodiment, see Figure 1 and Figure 2 , an opening is arranged at the center of the above-mentioned shading ring 3. The arrangement of the opening can help control the direction and angle of light entry, thereby effectively reducing or preventing the generation of stray light. Such a design can optimize the imaging quality of the optical system, reduce scattering and reflection phenomena in the optical system, and improve the clarity and contrast of the imaging.

[0030] In one embodiment, see Figure 2 , the above-mentioned opening is square.

[0031] In one embodiment, see Figure 2 , the opening is rectangular. The square or rectangular opening design can more accurately control the incident direction and angle of light. It can more effectively prevent unwanted light interference, further reduce the interference of stray light, and help improve the imaging accuracy and performance of optical equipment.

[0032] In one embodiment, see Figure 1 and Figure 2 , the shading ring 3 is closely attached to the outer surface of the lens 2. The shading ring 3 closely attached to the outer surface of the lens 2 can prevent background light or indirect incident light from passing through the optical system to the greatest extent and causing interference. This design effectively intercepts most of the stray light outside the field of view, ensuring the clarity and accuracy of the imaging.

[0033] In one embodiment, see Figure 1 and Figure 2 The outer surface of the lens 2 is a spherical surface, and the shading ring 3 covers and is closely attached to the outer surface of the lens 2.

[0034] The design of the outer surface of the spherical lens 2 enables the light to be focused or diffused more accurately, while the light shielding ring 3 covering and closely attached to the outer surface effectively intercepts most of the stray light outside the field of view. This integrated design improves the efficiency and imaging quality of the optical system.

[0035] In one embodiment, see Figure 1 One end of the lens 2 is embedded in the lens barrel 1, and the other end of the lens 2 is attached with a light shielding ring 3.

[0036] The shading ring 3 attached to the other end of the lens 2 can effectively control the incident angle and path of the light. This design can minimize or eliminate most of the stray light outside the field of view and improve the imaging quality and accuracy of the optical system.

[0037] See also Figure 3 and Figure 4 From the comparison of these two figures, it can be seen that the special-shaped shading ring 3 of this embodiment can effectively eliminate stray light of any radiation illumination intensity outside the field of view.

[0038] The above-mentioned special-shaped shading ring 3 for an optical machine lens includes a shading ring 3 which is arranged in close contact with the surface of the lens 2. The shading ring 3 is provided with an opening for light within the field of view, thereby effectively eliminating stray light of any radiation illumination intensity outside the field of view without being restricted by other component structures, thereby improving the imaging quality and performance of the optical device.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A special-shaped shading ring for an optical machine lens, characterized in that: include: A shading ring is connected to the lens surface of the optical machine lens, and an opening is provided on the shading ring.

2. The special-shaped shading ring for an optical machine lens according to claim 1, characterized in that: The opening is arranged at the center of the light shielding ring.

3. The special-shaped shading ring for an optical machine lens according to claim 2, characterized in that: The opening is square.

4. The special-shaped shading ring for an optical machine lens according to claim 3, characterized in that: The opening is rectangular.

5. The special-shaped shading ring for an optical machine lens according to claim 1, characterized in that: The shading ring is in close contact with the outer surface of the lens.

6. The special-shaped shading ring for an optical machine lens according to claim 5, characterized in that: The outer surface of the lens is a spherical surface, and the shading ring covers and is in close contact with the outer surface of the lens.

7. The special-shaped shading ring for an optical machine lens according to claim 1, characterized in that: One end of the lens is embedded in the lens barrel, and the other end of the lens is attached to the light shielding ring.

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