A line scale for calibrating an ophthalmic slit lamp microscope

Abstract

The utility model provides a kind of line scale for ophthalmic slit lamp microscope calibration, including scale body, it includes 0.1mm graduation short line and 0.2mm graduation long line, 0.1mm graduation short line and 0.2mm graduation long line are all set in the bottom and side edge of bottom plate.The utility model design is reasonable, by the line scale structure setting 75mm*25mm, make line scale structure small and convenient to fix in the observation position of the instrument, slit lamp microscope being calibrated, it is convenient for subsequent observation position of slit lamp microscope etc. Calibration, line scale structure and perpendicular scale structure of horizontal direction being simultaneously provided, 0.2 millimeter scale line is centrally placed and perpendicular, distribution is carried out in upper, middle and lower, it is convenient for calibration focusing and measurement, improve the calibration efficiency of measurement.

Description

Technical Field

[0001] This utility model mainly relates to the field of calibrating ophthalmic slit-lamp microscopes, specifically to a line ruler for calibrating ophthalmic slit-lamp microscopes. Background Technology

[0002] Slit-lamp microscopes are frequently used examination instruments in ophthalmic medical diagnosis. They are optical instruments used to examine the structure of the surface and epidermis of the eyeball and can quickly diagnose eye symptoms. With the increasing emphasis on eye health in China, the number of medical institutions using slit lamps is gradually increasing. When calibrating slit-lamp microscopes, a scribe line is required.

[0003] During the operation of specific embodiments, the inventors discovered the following defects: The existing slit lamp microscope uses a universal linear scale for calibration, with a range of 0-200mm and a resolution of 1mm, and another range of 0-10mm with a resolution of 0.5mm. The existing linear scale has a large size range and high resolution, but it is also large in size and lacks parallel lines and long scale settings, which causes inconvenience and inaccurate data in standard measurements.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model: This invention provides a linear ruler for calibrating an ophthalmic slit-lamp microscope, thereby solving the technical problems existing in the background art.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is: a linear ruler for calibrating an ophthalmic slit-lamp microscope, comprising a linear ruler structure, wherein the linear ruler structure is disposed inside the calibration bracket; A linear ruler structure includes a base plate, and a scale body is provided at the bottom of the base plate. The scale body includes 0.1mm short graduation lines and 0.2mm long graduation lines, both of which are located on the bottom and sides of the base plate.

[0007] Furthermore, the scale body includes a center-finding millimeter scale line and a millimeter scale line, and the number of the center-finding millimeter scale line and the millimeter scale line is set to multiple, and the multiple center-finding millimeter scale lines and the millimeter scale lines are arranged alternately.

[0008] Furthermore, the center point millimeter graduation line is aligned with the 0.2mm graduation long line, and the millimeter graduation line is aligned with the 0.1mm graduation short line.

[0009] Furthermore, the height of the center finding millimeter line is set to 8mm, and the height of the millimeter scale line is set to 4mm.

[0010] Furthermore, the number of scale line bodies is set to two, one scale line body is set vertically, and the other scale line body is set horizontally.

[0011] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model has a reasonable design. By setting the linear scale structure to 75mm*25mm, the linear scale structure is compact and easy to fix at the observation position of the instrument being calibrated, such as the slit lamp microscope. This facilitates subsequent calibration of the observation position of the slit lamp microscope, etc. At the same time, the horizontal linear scale structure and the vertical scale structure are set, with the 0.2 mm scale line placed in the center and vertically distributed at the top, middle and bottom, which facilitates calibration, focusing and measurement, and improves the calibration efficiency of measurement. The device integrates the functions of the line scale, combining the measurement indicators such as the angular magnification error and the parallelism of the two sides of the slit image into one unit. The scale division is 0.1mm, and the 0.2mm line is used to measure the angular magnification. The height of the 0.2mm line is extended to 8mm, which can also measure the slit image. The structure is highly innovative. High accuracy; the maximum allowable distance between any two graduation lines is ±0.005mm. The width and height of the scale inside the linear ruler structure were designed with optimal data obtained through multiple optimization and measurement experiments. The maximum permissible error is set based on the current manufacturing process and the product parameters of the slit lamp microscope being calibrated; The experimental data on the horizontal and vertical scale divisions, line widths, and line heights of this design, the allowable errors of the upper, middle, and lower layout and the distance between the scale lines, and the fact that the center-finding millimeter scale line is a key point for improving the calibration of point finding and reading are all important aspects of this design. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present utility model Figure 1 Enlarged view of a portion of point A in the middle.

[0013] Figure label: 1. Linear ruler structure; 101. Base plate; 102. Scale line body; 103. Scale body. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0018] See attached document Figure 1-2 A linear scale for calibrating an ophthalmic slit-lamp microscope includes a linear scale structure 1, which is disposed inside a calibration bracket. Linear ruler structure 1 includes a base plate 101, a bottom part 102 is provided at the bottom of the base plate 101, and a scale body 103 is provided at the bottom of the base plate 101. The scale body 103 includes 0.1mm short graduation lines and 0.2mm long graduation lines. Both the 0.1mm short graduation lines and the 0.2mm long graduation lines are located on the bottom and side of the base plate 101. The scale body 1 is placed inside the calibration bracket. Then, the scale body 102 is aligned with the internal lens of the ophthalmic slit-lamp microscope. The scale body 102 is then viewed through the lens to calibrate the internal lens of the ophthalmic slit-lamp microscope. The horizontal line measurement range is designed to be 0-10mm, and the vertical line measurement range is 0-8mm. The horizontal line is located directly below the vertical line.

[0019] Furthermore, the scale body 102 includes a center-finding millimeter scale line and millimeter graduation lines. Multiple center-finding millimeter scale lines and millimeter graduation lines are provided, and these lines are staggered. The center-finding millimeter scale line is aligned with the 0.2mm graduation long line, and the millimeter graduation line is aligned with the 0.1mm graduation short line. The height of the center-finding millimeter scale line is set to 8mm, and the height of the millimeter graduation line is set to 4mm. The ophthalmic slit-lamp microscope first examines the longer center-finding millimeter scale line, and then, based on this longer line, examines the millimeter graduation lines and the scale body 103 at the bottom. This allows for quick location of the scale body 103, avoiding the inability to quickly find the corresponding scale during the calibration of the lenses inside the ophthalmic slit-lamp microscope due to the smaller millimeter scale lines and scale body 103.

[0020] Furthermore, the number of the scale line bodies 102 is set to two, one scale line body 102 is set vertically and the other scale line body 102 is set horizontally. The two scale line bodies 102 can calibrate the lens inside the ophthalmic slit lamp microscope from different directions, thereby improving its accuracy. The base plate 101 is supported by high-strength transparent glass. Then, the grooves of the scale body 102 and the scale body 103 are engraved on the surface of the base plate 101 by laser engraving. After that, bright colors are applied to the inside of the grooves for identification.

[0021] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A linear ruler for calibrating an ophthalmic slit-lamp microscope, characterized in that: include Linear ruler structure (1), wherein the linear ruler structure (1) is disposed inside the calibration bracket; The line ruler structure (1) includes a base plate (101), a scale line body (102) is provided at the bottom of the base plate (101), and a scale body (103) is provided at the bottom of the base plate (101). The scale body (103) includes 0.1mm graduation short lines and 0.2mm graduation long lines, both of which are located on the bottom and side of the base plate (101).

2. The linear ruler for calibrating an ophthalmic slit-lamp microscope according to claim 1, characterized in that: The scale body (102) includes a center-finding millimeter scale line and a millimeter scale line. The number of the center-finding millimeter scale line and the millimeter scale line is set to multiple, and the multiple center-finding millimeter scale lines and the millimeter scale lines are arranged alternately.

3. A linear ruler for calibrating an ophthalmic slit-lamp microscope according to claim 2, characterized in that: The center point millimeter graduation line is aligned with the 0.2mm graduation long line, and the millimeter graduation line is aligned with the 0.1mm graduation short line.

4. A linear ruler for calibrating an ophthalmic slit-lamp microscope according to claim 2, characterized in that: The height of the center finding millimeter line is set to 8mm, and the height of the millimeter scale line is set to 4mm.

5. A linear ruler for calibrating an ophthalmic slit-lamp microscope according to claim 1, characterized in that: The number of the scale line bodies (102) is set to two, one scale line body (102) is set vertically, and the other scale line body (102) is set horizontally.

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