CN212275556U

CN212275556U - Light path conversion device for detecting light source of pesticide residue detector

Info

Publication number: CN212275556U
Application number: CN202021011318.7U
Authority: CN
Inventors: 许俊斌; 朱峻青; 周瑾艳; 贾锐
Original assignee: Guangdong Provincial Institute Of Metrology (south China National Centre Of Metrology)
Current assignee: Guangdong Provincial Institute Of Metrology (south China National Centre Of Metrology)
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-01-01
Anticipated expiration: 2030-06-04

Abstract

An optical path switching device for a light source of a pesticide residue detector, comprising: a cuvette; and the reflecting lens is obliquely arranged at the bottom of the cuvette and forms an included angle of 45 degrees with the bottom surface of the cuvette. The utility model discloses a light path conversion equipment through the setting of reflection lens, can reflect the light source in the pesticide residue detector for light jets out along the vertical direction of cell, and the light probe only needs to be placed the opening part at the cell and can receive reflection light, need not to tear open the machine to the light source and detect, and it is very convenient to use.

Description

Light path conversion device for detecting light source of pesticide residue detector

Technical Field

The utility model relates to a detection apparatus for pesticide residue detector.

Background

According to the national measurement technical standard of pesticide residue detector, when the pesticide residue detector is calibrated, the peak wavelength of a light source of the detector needs to be detected. However, most of light source designs are in order to satisfy the requirement of placing the cuvette, and one side of the lower part of the holding groove for placing the cuvette is usually arranged in the pesticide residue detector, and because the position reserved in the holding groove is narrow, when the spectrometer is used for detecting the wavelength, the optical probe of the spectrometer cannot be fixedly placed in the holding groove, and the optical path is difficult to align, and the spectrometer is generally required to be disassembled for detection.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an aspect provides a light path conversion equipment for detecting pesticide residue detector's light source, include:

a cuvette; and

the reflecting lens is obliquely arranged at the bottom of the cuvette and forms an included angle of 45 degrees with the bottom surface of the cuvette.

The utility model discloses a light path conversion equipment through the setting of reflection lens, can reflect the light source in the pesticide residue detector for light jets out along the vertical direction of cell, and the light probe only needs to be placed the opening part at the cell and can receive reflection light, need not to tear open the machine to the light source and detect, and it is very convenient to use.

In some embodiments, the cuvette further comprises an upper cover arranged on the top of the cuvette, the upper cover is provided with an optical probe joint part matched with the optical probe in shape along the vertical direction, and a vertical through hole for vertical light to pass through is formed in the optical probe joint part.

In some embodiments, the optical probe engagement member is provided with external threads for engaging the optical probe.

In some embodiments, the upper cover is removably disposed with the cuvette.

Drawings

Fig. 1 is an exploded view of an optical path switching device according to some embodiments of the present invention;

fig. 2 is a usage state diagram of the optical path switching device according to some embodiments of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 schematically shows a light path conversion device (hereinafter referred to as light path conversion device) for detecting a light source 1 of a pesticide residue detector according to some embodiments of the present invention, which includes a cuvette 4, a reflection lens 5, an upper cover 6, and an optical probe joint 7.

This cell 4 adopts pesticide residue detector's general cell, and its shape is the cavity cuboid, and the top is equipped with the opening. The reflecting mirror 5 is obliquely arranged at the bottom of the cuvette 4 and forms an included angle of 45 degrees with the bottom surface of the cuvette 4. During the use, place this light path conversion equipment in the holding recess 2 of the cell 4 of pesticide residue detector, the light that comes from the light source 1 of one side of holding recess 2 jets into cell 4 to through 5 reflections of reflection lens, upwards jets out along the vertical direction of cell 4, so that aim at with light probe 3, received by light probe 3.

The upper lid 6 is adapted to the shape of the opening in the top of the cuvette 4, into which it can be fitted. Preferably, the upper cover 6 and the cuvette 4 are detachably disposed, for example, the upper cover 6 can be covered at the opening of the cuvette 4 by a step, a bayonet, or the like, so that the upper cover 6 can be taken down at any time.

The optical probe joint 7 is fixedly arranged on the upper cover 6, the shape of the optical probe joint is matched with that of the optical probe 3, and a vertical through hole 8 for vertical light to pass through is formed in the optical probe joint 7. During the use, light probe 3 follows vertical direction and the joint of light probe fastener 7 to correspond with vertical through-hole 8, receive the vertical light of cell 4 internal reflection. Preferably, the optical probe fastener 7 is provided with an external thread for screwing and fixing the optical probe 3.

The utility model discloses a light path conversion equipment through the setting of reflector plate 5, can reflect light source 1 in the pesticide residue detector for light jets out along the vertical direction of cell 4, and light probe 3 only needs to be placed and can be received reflection light at the opening part of cell 4, need not to tear open machine to light source 1 and detect, and it is very convenient to use. Furthermore, by arranging the upper cover 6 and the optical probe joint 7, the optical probe 3 can be conveniently mounted and dismounted, reflected light can be better aligned, and the accuracy of the test is improved.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, or the above technical solutions can be freely combined, including the technical features between the above different embodiments, which all belong to the protection scope of the present invention.

Claims

1. An optical path switching device for a light source of a pesticide residue detector, comprising:

a cuvette; and

2. The light path switching device for detecting the light source of the pesticide residue detector as claimed in claim 1, further comprising an upper cover arranged on the top of the cuvette, wherein the upper cover is provided with an optical probe joint part matched with the optical probe in shape along the vertical direction, and a vertical through hole for vertical light to pass through is formed in the optical probe joint part.

3. The light path switching device for detecting the light source of the pesticide residue detector as claimed in claim 2, wherein the optical probe joint is provided with an external thread for being jointed with the optical probe.

4. The light path switching device for detecting the light source of the pesticide residue detector as claimed in claim 2, wherein the upper cover is detachably disposed with the cuvette.