CN211554462U - A calibration tool for polarizing microscope - Google Patents

Abstract

The utility model discloses a calibration tool for a polarizing microscope, which is characterized by comprising a half-shadow plate and a half-shadow plate support plate, wherein the half-shadow plate is two symmetrically arranged polarizers, the half-shadow plate is There is a circular hole in the middle of the support plate, the half-shadow plate is shielded at the circular hole, and the polarization direction of the polarizer and its symmetry line form an included angle of 37°. The beneficial effects of the utility model include: the calibration difficulty of the polarized light microscope is reduced, the difference between parallel and vertical light intensity can be clearly judged, and the calibration of the polarized light microscope is simple and easy to operate.

Description

A calibration tool for polarized light microscopes

technical field

The utility model relates to the field of polarized light instruments, calibration of tools, and inspection tools, in particular to a calibration tool and a calibration method for polarized light microscopes.

Background technique

When an instrument or microscope with polarized light as its basic working principle needs to perform quantitative analysis on the sample to be tested, it is necessary to correct the direction of the polarized light components used in the instrument. However, under ordinary observation methods, it is only possible to identify whether the light energy is weakened, but cannot determine the polarization direction. Taking a polarizing microscope as an example, in the past, there were generally two tools for judging the reference direction of polarized light, ore slices (mineral slices) with biotite minerals, and half-shadow films made of thin-film polarizers or minerals such as quartz. In the prior art, although the mineral slice of biotite can be used to determine the polarization direction of the initial optical device, whether it is a horizontal 0° or a vertical direction of 90°. However, it is often used as a teaching tool, which requires a certain degree of recognition of knowledge and is not universal. In the factory calibration work, it seems slow to find, difficult to operate, and requires workers to have more professional knowledge. And it is considered that the judgment error is large.

SUMMARY OF THE INVENTION

Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a calibration tool and calibration method for polarized light microscopes, which have a simple structure, and can determine the polarization direction of the polarizing part of the microscope according to the image results, which is convenient for adjustment.

In order to achieve the above object, the utility model adopts the following technical solutions:

A calibration tool for a polarizing microscope, characterized in that it comprises a half-shadow plate and a half-shadow plate support, wherein the half-shadow plate is two symmetrically arranged polarizers, and the half-shadow plate has a circular shape in the middle of the plate. The half-shadow plate is shielded at the circular hole, and the polarization direction of the polarizer is at an angle of 37° with its line of symmetry.

Further, the half-shadow plate is a rectangular plate with rounded corners around, and the symmetry axis of the half-shadow plate is perpendicular to the long side of the half-shadow plate.

Further, the half shadow plate supporting plate is a thin metal plate, and the front surface of the half shadow plate is etched with the polarization direction symbol and the polarization angle value of the half shadow plate.

A method for calibrating the polarization direction of a polarizing microscope, comprising the following steps:

S1. Set a point light source in front of the polarizing part of the polarizing microscope;

S2. Place the half-shade with a polarization direction of 37° behind the polarizing part of the polarizing microscope, and observe the results;

S3, judge the polarization direction of the polarization part of the polarization microscope according to the observed image results;

S4. Adjust the direction of the polarizing part of the polarizing microscope according to the observation result.

Further, if the result observed in step S3 is half light and half dark, it means that the angle between the polarization direction of the polarizing part and the direction of the symmetry axis of the half-shadow plate is an acute angle; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is partial. If it is bright, it means that the polarization direction of the polarizing part is parallel to the direction of the symmetry axis of the half-shadow; when the result observed in S3 is the same light and dark, and the overall brightness is dark, it means that the polarization direction of the polarizing part is parallel to the symmetry axis of the half-shadow. vertical.

The beneficial effects of the utility model include: the calibration difficulty of the polarizing microscope is reduced, the difference between parallel and vertical light intensity can be clearly judged, and the calibration of the polarizing microscope is simple and easy to operate.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

2 is a schematic diagram of the calibration method of the present invention;

FIG. 3 is a polarization diagram corresponding to some images of the present invention.

Detailed ways

The present utility model will be described in further detail below with reference to specific embodiments and accompanying drawings.

A polarization direction calibration tool for a polarizing microscope as shown in FIG. 1 includes a half-shadow plate 1 and a half-shadow plate holder 2, wherein the half-shadow plate 1 is two symmetrically arranged polarizers, and the half-shadow plate holder There is a circular hole in the middle of the plate 2, and the half-shadow film 1 is shielded at the circular hole, and the polarization direction of the polarizer and its symmetry line are at an angle of 37°. The half-shadow plate 2 is a rectangular plate with rounded corners around it. The axis of symmetry of the half-shadow plate 1 is perpendicular to the long side of the half-shadow plate 2 . The half-shadow plate 2 is a thin metal plate, and its front side is etched with the polarization direction symbol and the polarization angle value of the half-shadow plate 1 .

According to the calibration principle shown in FIG. 2 , the polarization direction calibration method of the polarizing microscope of the present invention is characterized in that, it includes the following steps:

S1. Set a point light source in front of the polarizing part of the polarizing microscope;

S2. Place the half-shade with a polarization direction of 37° behind the polarizing part of the polarizing microscope, and observe the results;

S3, judge the polarization direction of the polarization part of the polarization microscope according to the observed image results;

S4. Adjust the direction of the polarizing part of the polarizing microscope according to the observation result.

According to the calibration method of the present invention, the observed partial results are shown in Figure 3;

The result observed in step S3 is half light and half dark, which means that the angle between the polarization direction of the polarizing part and the direction of the symmetry axis of the half-shadow film is an acute angle; when the result observed in S3 is that the light and dark are consistent, and the overall brightness is bright, it means that The polarization direction of the polarizing part is parallel to the direction of the symmetry axis of the half-shadow; when the result observed in S3 is the same light and dark, and the overall brightness is dark, it means that the polarization direction of the polarizing part is perpendicular to the symmetry axis of the half-shadow.

The technical solutions provided by the embodiments of the present utility model have been described in detail above. The principles and implementations of the embodiments of the present utility model are described in this paper by using specific examples. The descriptions of the above embodiments are only suitable for helping the understanding of the present utility model. The principle of the embodiment; at the same time, for those skilled in the art, according to the embodiment of the present utility model, there will be changes in the specific implementation and application scope. Utility Model Restrictions.

Claims (3)

1. A calibration tool for a polarizing microscope, characterized by: the solar cell comprises a half-shadow mask (1) and a half-shadow mask supporting plate (2), wherein the half-shadow mask (1) is two polarizing films which are symmetrically arranged, a circular hole is formed in the middle of the half-shadow mask supporting plate (2), the half-shadow mask (1) is shielded at the circular hole, and the polarization direction of each polarizing film forms an included angle of 37 degrees with the symmetric line of the polarizing film.

2. A calibration tool for a polarization microscope according to claim 1, wherein: the supporting plate (2) of the half-shadow mask is a rectangular plate, the periphery of the supporting plate is rounded, and the symmetrical axis of the half-shadow mask (1) is vertical to the long edge of the supporting plate (2) of the half-shadow mask.

3. A calibration tool for a polarization microscope according to claim 1, wherein: the supporting plate (2) of the half-shadow mask is a metal thin plate, and the polarization direction symbol and the polarization angle numerical value of the half-shadow mask (1) are etched on the front surface of the supporting plate.

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