A polarization direction calibration tool and calibration method for polarizing microscope

Abstract

The present invention discloses a polarization direction calibration tool and calibration method for a polarizing microscope, characterized in that: it comprises a semi-shaded sheet and a semi-shaded sheet support plate, wherein the semi-shaded sheet is two symmetrically arranged polarizing sheets, the semi-shaded sheet support plate has a circular hole in the middle, the semi-shaded sheet is shielded at the circular hole, and the polarization direction of the polarizing sheet forms an angle of 37° with its symmetry line. The beneficial effects of the present invention include: reducing the calibration difficulty of a polarizing microscope, being able to clearly judge the difference in parallel and vertical light intensities, and being simple and easy to operate for calibrating a polarizing microscope.

Description

Technical Field

[0001] The invention relates to the field of polarized light instruments, tool calibration and inspection tools, and in particular to a polarization direction calibration tool and a calibration method for a polarized light microscope. Background Art

[0002] When an instrument or microscope that uses polarized light as the basic working principle needs to perform quantitative analysis on the sample being tested, the polarized light components used in the instrument have to be oriented. However, under ordinary observation methods, it is only possible to identify whether the light energy has weakened, but it is impossible to determine the polarization direction. Taking a polarizing microscope as an example, there are generally two tools for determining the reference direction of polarized light in the past: a mineral slice with biotite minerals (mineral slices), and a semi-shaded slice made of thin-film polarizers or minerals such as quartz. Although the mineral slices of biotite can be used in the prior art to determine the polarization direction of the initial optical device, whether it is horizontal 0° or vertical 90°. However, it is often used as a teaching tool, which requires a certain degree of recognition of knowledge and is not universal. In factory calibration work, it seems slow to find, difficult to operate, and requires workers to have more professional knowledge. It is also believed that the judgment error is large. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a polarization direction calibration tool and calibration method for a polarizing microscope, which has a simple structure and can determine the polarization direction of the polarization part of the microscope according to the image results, thereby facilitating adjustment.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A polarization direction calibration tool for a polarizing microscope, characterized in that it includes a semi-shaded film and a semi-shaded film support plate, wherein the semi-shaded film is two symmetrically arranged polarizing films, the semi-shaded film support plate has a circular hole in the middle, the semi-shaded film is blocked at the circular hole, and the polarization direction of the polarizing film forms an angle of 37° with its symmetry line.

[0006] Furthermore, the semi-shade film supporting plate is a rectangular plate with rounded corners on all sides, and the symmetry axis of the semi-shade film is perpendicular to the long side of the semi-shade film supporting plate.

[0007] Furthermore, the semi-shadow film support plate is a metal thin plate, and the polarization direction symbol and polarization angle value of the semi-shadow film are etched on the front side thereof.

[0008] A method for calibrating the polarization direction of a polarizing microscope, characterized in that it comprises the following steps:

[0009] S1. Set a point light source in front of the polarization part of the polarizing microscope;

[0010] S2. Place a semi-shaded film with a polarization direction of 37° behind the polarization part of the polarizing microscope and observe the results;

[0011] S3, judging the polarization direction of the polarization part of the polarizing microscope according to the observed image results;

[0012] S4. Adjust the direction of the polarization part of the polarizing microscope according to the observation results.

[0013] Furthermore, if the result observed in step S3 is half bright and half dark, it means that the angle between the polarization direction of the polarization part and the direction of the symmetry axis of the semi-shade film is an acute angle; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is brighter, it means that the polarization direction of the polarization part is parallel to the direction of the symmetry axis of the semi-shade film; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is darker, it means that the polarization direction of the polarization part is perpendicular to the direction of the symmetry axis of the semi-shade film.

[0014] The beneficial effects of the present invention include: reducing the difficulty of calibrating a polarizing microscope, being able to clearly judge the difference in parallel and vertical light intensities, and making the calibration of the polarizing microscope simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the calibration method of the present invention;

[0017] Figure 3 It is a polarization diagram corresponding to a part of the image of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] A kind of Figure 1 The polarization direction calibration tool for a polarizing microscope shown in the figure comprises a semi-shaded film 1 and a semi-shaded film support plate 2, wherein the semi-shaded film 1 is two symmetrically arranged polarizing films, the semi-shaded film support plate 2 has a circular hole in the middle, the semi-shaded film 1 is blocked at the circular hole, and the polarization direction of the polarizing film forms an angle of 37° with its symmetry line. The semi-shaded film support plate 2 is a rectangular plate with rounded corners on all sides, and the symmetry axis of the semi-shaded film 1 is perpendicular to the long side of the semi-shaded film support plate 2. The semi-shaded film support plate 2 is a thin metal plate, and the polarization direction symbol and polarization angle value of the semi-shaded film 1 are etched on its front.

[0020] according to Figure 2 The calibration principle shown in the figure, the polarization direction calibration method of the polarizing microscope of the present invention is characterized by comprising the following steps:

[0021] S1. Set a point light source in front of the polarization part of the polarizing microscope;

[0022] S2. Place a semi-shaded film with a polarization direction of 37° behind the polarization part of the polarizing microscope and observe the results;

[0023] S3, judging the polarization direction of the polarization part of the polarizing microscope according to the observed image results;

[0024] S4. Adjust the direction of the polarization part of the polarizing microscope according to the observation results.

[0025] According to the calibration method of the present invention, some of the results observed are as follows Figure 3 As shown;

[0026] If the result observed in step S3 is half bright and half dark, it means that the angle between the polarization direction of the polarization part and the direction of the symmetry axis of the semi-shade film is an acute angle; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is brighter, it means that the polarization direction of the polarization part is parallel to the direction of the symmetry axis of the semi-shade film; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is darker, it means that the polarization direction of the polarization part is perpendicular to the direction of the symmetry axis of the semi-shade film.

[0027] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for calibrating the polarization direction of a polarizing microscope, characterized in that: The invention comprises a polarization direction calibration tool for a polarizing microscope, the tool comprising a semi-shaded film (1) and a semi-shaded film support plate (2), wherein the semi-shaded film (1) is two symmetrically arranged polarizing films, the semi-shaded film support plate (2) has a circular hole in the middle, the semi-shaded film (1) is blocked at the circular hole, and the polarization direction of the polarizing film forms an angle of 37° with its symmetry line; The following steps are also included: S1. Set a point light source in front of the polarization part of the polarizing microscope; S2. Place a semi-shaded film with a polarization direction of 37° behind the polarization part of the polarizing microscope and observe the results; S3, judging the polarization direction of the polarization part of the polarizing microscope according to the observed image results; If the observation result is half bright and half dark, it means that the angle between the polarization direction of the polarization part and the symmetry axis direction of the semi-shade film is an acute angle; if the observation result in S3 is that the light and dark are consistent, and the overall brightness is bright, it means that the polarization direction of the polarization part is parallel to the symmetry axis direction of the semi-shade film; if the observation result in S3 is that the light and dark are consistent, and the overall brightness is dark, it means that the polarization direction of the polarization part is perpendicular to the symmetry axis direction of the semi-shade film; S4. Adjust the direction of the polarization part of the polarizing microscope according to the observation results.

2. A polarization direction calibration method for a polarizing microscope according to claim 1, characterized in that: The semi-shade film support plate (2) is a rectangular plate with rounded corners on all sides, and the symmetry axis of the semi-shade film (1) is perpendicular to the long side of the semi-shade film support plate (2).

3. A polarization direction calibration method for a polarizing microscope according to claim 1, characterized in that: The semi-shaded film support plate (2) is a metal thin plate, and the polarization direction symbol and polarization angle value of the semi-shaded film (1) are etched on the front side thereof.

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