CN213276078U - Portable spectroscope based on diffraction grating - Google Patents
Portable spectroscope based on diffraction grating Download PDFInfo
- Publication number
- CN213276078U CN213276078U CN202022239954.1U CN202022239954U CN213276078U CN 213276078 U CN213276078 U CN 213276078U CN 202022239954 U CN202022239954 U CN 202022239954U CN 213276078 U CN213276078 U CN 213276078U
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- cylinder
- slit
- grating
- lens
- lens barrel
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Abstract
The utility model discloses a portable spectroscope based on diffraction grating, the spectroscope is connected gradually by a slit section of thick bamboo, lens cone first, lens cone second, grating section of thick bamboo and is constituted. The slit cylinder is in a bottle cap shape, the closed end of the slit cylinder is provided with a protective lens, the open end of the slit cylinder is provided with internal threads, and a slit sheet is fixed in the slit cylinder. The two ends of the lens barrel are provided with internal threads, and the middle part of the lens barrel is fixed with a convex lens. One end of the grating cylinder is provided with internal threads, the other end of the grating cylinder is provided with a connecting ring, and a grating sheet is fixed in the grating cylinder. The two ends of the lens cone A are respectively screwed with one end of the slit cylinder and one end of the lens cylinder, and the two ends of the lens cone B are respectively screwed with the other end of the lens cylinder and the grating cylinder. The distance from the slit sheet to the convex lens is equal to the focal length of the convex lens. The utility model discloses can be used to observe the grating diffraction spectrum of light source, its small light in weight, convenient to carry need not complicated regulation, can regard as science popularization instrument to use, is favorable to the daily observation of diffraction phenomenon.
Description
Technical Field
The utility model relates to an observation utensil of optical phenomenon, especially a portable spectroscope based on diffraction grating.
Background
The grating is an important light splitting device, and when the grating is irradiated by the polychromatic light, light with different wavelengths is separated due to different diffraction angles to form a grating diffraction line. By means of grating diffraction, the spectral composition of the light source can be observed and analyzed. In a laboratory, diffraction spectra of light sources such as mercury lamps are usually observed and measured on a spectrometer. The spectrometer is heavy, inconvenient to carry, expensive in price and complex to adjust, and is not beneficial to daily observation of diffraction phenomena and popularization of related scientific knowledge.
Disclosure of Invention
The utility model aims at providing a portable spectroscope based on diffraction grating to make things convenient for the observation of diffraction spectrum.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a portable spectroscope based on diffraction grating is formed by sequentially connecting a slit cylinder, a lens barrel A, a lens barrel B and a grating cylinder;
the slit cylinder is in a bottle cap shape, the closed end of the slit cylinder is provided with a protective lens, the open end of the slit cylinder is provided with internal threads, a slit sheet is fixed in the slit cylinder, and the slit sheet is provided with a linear slit which can transmit light;
internal threads are arranged at two ends of the lens barrel, and a convex lens is fixed in the middle of the lens barrel;
a grating sheet is fixed in the grating cylinder, one end of the grating cylinder is provided with internal threads, and the other end of the grating cylinder is provided with a connecting ring for connecting a camera lens;
the lens barrel A and the lens barrel B are both hollow cylinders, external threads are arranged at two ends of the lens barrel A and the lens barrel B, two ends of the lens barrel A are respectively screwed with one end of the slit barrel and one end of the lens barrel, and two ends of the lens barrel B are respectively screwed with the other end of the lens barrel and the grating barrel;
the distance from the slit sheet to the convex lens is equal to the focal length of the convex lens;
the direction of the slit on the slit sheet is consistent with the direction of the grating nick on the grating sheet;
the surface of the protective lens is plated with an antireflection film for increasing light rays entering the slit cylinder.
Because the slit sheet is arranged on the focal plane of the convex lens, light rays from the slit are changed into parallel light to irradiate the grating after passing through the convex lens, and light rays with different wavelengths are separated due to different diffraction angles after passing through the grating, so that a grating spectrum is formed.
The utility model discloses owing to adopt above-mentioned design, can produce following beneficial effect: the slit cylinder faces the light source, and the connecting ring is connected with the camera lens, so that the grating diffraction spectrum of the light source can be observed on the camera screen, and the spectrum can be shot. The diffraction spectrum of the grating can also be observed directly by eyes against the connecting ring without using a camera. The utility model discloses a detachable structure, small light in weight, convenient to carry need not complicated regulation, can regard as science popularization instrument to use, is favorable to diffraction phenomenon's daily observation and the popularization of relevant scientific knowledge.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a schematic view of a slit cartridge.
Fig. 3 is a schematic view of a grating cylinder.
In the figure: 1. the lens comprises a slit cylinder, 2 lens cones, 3 lens cones, 4 lens cones, 5 grating cylinders, 11 slit sheets, 12 protective lenses, 13 screw holes, 14 fastening screws, 31 convex lenses, 51 grating sheets and 52 connecting rings.
Detailed Description
As shown in fig. 1, 2 and 3, a portable spectroscope based on a diffraction grating comprises a slit cylinder 1, a lens barrel a 2, a lens barrel 3, a lens barrel b 4 and a grating cylinder 5, and is formed by connecting the slit cylinder 1, the lens barrel a 2, the lens barrel b 3, the lens barrel b 4 and the grating cylinder 5 in sequence.
The slit cylinder 1 is in a bottle cap shape, the closed end of the slit cylinder is provided with a protective lens 12, the open end of the slit cylinder is provided with internal threads, a slit sheet 11 is fixed in the slit cylinder 1, a slit is arranged on the slit sheet 11, and the surface of the protective lens 12 is plated with an antireflection film.
The lens cone A2 and the lens cone B4 are both hollow cylinders, and both ends of the lens cone A2 and the lens cone B4 are provided with external threads.
The lens barrel 3 has internal threads at both ends and a convex lens 31 fixed in the middle.
One end of the grating cylinder 5 is provided with internal threads, the other end is provided with a connecting ring 52, and a grating sheet 51 is fixed in the grating cylinder 5.
Two ends of the lens cone A2 are respectively screwed with one end of the slit cylinder 1 and one end of the lens cylinder 3. Two ends of the lens barrel B4 are respectively screwed with the other end of the lens barrel 3 and the grating barrel 5.
The slit direction on the slit sheet 11 coincides with the grating notch direction on the grating sheet 51.
The body of the slit cylinder 1 is provided with a threaded hole 13 and is provided with a fastening screw 14 for calibrating and positioning the position of the slit cylinder 1. The position of the slit cylinder 1 is adjusted so that the distance from the slit sheet 11 to the convex lens 31 is equal to the focal length of the convex lens 31, and then the slit cylinder 1 is locked with the lens cone 2 by the fastening screw 14.
Claims (3)
1. A portable spectroscope based on diffraction grating, its characterized in that: the portable spectroscope is formed by sequentially connecting a slit cylinder, a lens cone A, a lens cone B and a grating cylinder;
the slit cylinder is in a bottle cap shape, the closed end of the surface of the slit cylinder is provided with a protective lens, the open end of the slit cylinder is provided with internal threads, a slit sheet is fixed in the slit cylinder, and a slit is arranged on the slit sheet;
internal threads are arranged at two ends of the lens barrel, and a convex lens is fixed in the middle of the lens barrel;
one end of the grating cylinder is provided with internal threads, the other end of the grating cylinder is provided with a connecting ring which can be connected with a camera, and a grating sheet is fixed in the grating cylinder;
the lens barrel A and the lens barrel B are both hollow cylinders, external threads are arranged at two ends of the lens barrel A and the lens barrel B, two ends of the lens barrel A are respectively screwed with one end of the slit barrel and one end of the lens barrel, and two ends of the lens barrel B are respectively screwed with the other end of the lens barrel and the grating barrel;
the distance from the slit sheet to the convex lens is equal to the focal length of the convex lens.
2. A portable diffraction grating-based beam splitter as claimed in claim 1, wherein: the slit direction on the slit sheet is consistent with the grating nicking direction on the grating sheet.
3. A portable diffraction grating-based beam splitter as claimed in claim 1, wherein: and the surface of the protective lens is plated with an antireflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022239954.1U CN213276078U (en) | 2020-10-10 | 2020-10-10 | Portable spectroscope based on diffraction grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022239954.1U CN213276078U (en) | 2020-10-10 | 2020-10-10 | Portable spectroscope based on diffraction grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213276078U true CN213276078U (en) | 2021-05-25 |
Family
ID=75948060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022239954.1U Expired - Fee Related CN213276078U (en) | 2020-10-10 | 2020-10-10 | Portable spectroscope based on diffraction grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213276078U (en) |
-
2020
- 2020-10-10 CN CN202022239954.1U patent/CN213276078U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210525 Termination date: 20211010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |