CN215812391U

CN215812391U - Portable spectrometer

Info

Publication number: CN215812391U
Application number: CN202121202961.2U
Authority: CN
Inventors: 李小锴; 李清澜; 宋宁
Original assignee: Beijing Derun Tiancheng Environmental Protection Technology Co ltd
Current assignee: Beijing Derun Tiancheng Environmental Protection Technology Co ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-02-11
Anticipated expiration: 2031-06-01

Abstract

The utility model relates to a portable spectrometer, which comprises a box body, an optical fiber seat arranged on the side wall of the box body, a stainless steel slit arranged at the position of the optical fiber seat, a collimating objective lens corresponding to the position of the optical fiber seat, a plane grating for bearing parallel light behind the collimating objective lens, an imaging objective lens for bearing light beams dispersed by the plane grating, and a linear array CMOS photosensitive surface for bearing focusing light spots behind the imaging objective lens, wherein the collimating objective lens is arranged on the side wall of the box body; the utility model has the advantages of system modularization and flexible construction, so that in actual production research, various samples can be detected in real time only by matching with a set of portable spectrometer and different testing accessories.

Description

Portable spectrometer

Technical Field

The utility model relates to a portable spectrometer.

Background

The traditional spectrometer has the defects of complex structure, limited use environment, inconvenience in carrying, high price and the like, and is difficult to meet the requirements of field detection and real-time monitoring. Therefore, micro fiber optic spectrometers have become an important research direction for the development of spectroscopy instruments. In recent years, due to the development and maturity of optical fiber technology, grating technology and array detector technology, the structure of the spectrum detection system is more modularized, and the use is more convenient and flexible, so that the micro optical fiber spectrometer is widely applied.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a portable spectrometer with simple structure and low production cost.

The technical scheme adopted by the utility model is as follows: a portable spectrometer comprises a box body, an optical fiber seat arranged on the side wall of the box body, a stainless steel slit arranged at the position of the optical fiber seat, a collimating objective lens corresponding to the position of the optical fiber seat, a plane grating used for receiving parallel light behind the collimating objective lens, an imaging objective lens used for receiving light beams dispersed by the plane grating, and a linear array CMOS photosensitive surface used for receiving a focusing light spot behind the imaging objective lens.

Furthermore, an optical filter support is arranged between the imaging objective lens and the linear array CMOS photosensitive surface, and an optical filter is arranged in the optical filter support.

Furthermore, the optical filter support is provided with a long round hole parallel to the linear array CMOS photosensitive surface, and a screw is arranged in the long round hole to install the optical filter support in the box body.

Furthermore, the imaging objective lens is arranged on an imaging objective lens support, a long circular hole facing to the linear array CMOS photosensitive surface is formed in the imaging objective lens support, and a screw is arranged in the long circular hole to install the imaging objective lens support in the box body.

Further, the collimator objective is installed on a collimator objective support, a long circular hole facing the stainless steel slit is formed in the lower portion of the collimator objective support, and screws are arranged in the long circular hole to install the collimator objective support in the box body.

Furthermore, the plane grating is arranged on the plane grating support, an arc-shaped hole is formed in the plane grating support, a screw is arranged in the arc-shaped hole to install the plane grating support in the box body, and the angle between the plane grating and the imaging objective lens can be adjusted.

Further, the imaging objective lens is a concave reflector.

The utility model has the positive effects that:

the utility model has the advantages of system modularization and flexible construction, so that in actual production research, various samples can be detected in real time only by matching with a set of portable spectrometer and different testing accessories. Meanwhile, the utility model has the characteristics of compact internal structure, no moving part, wide wavelength coverage range, high detection speed, low price and the like, and is widely applied to the detection field.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of an imaging objective lens holder according to the present invention.

Detailed Description

As shown in attached figure 1, the optical fiber grating light source comprises a box body 1, an optical fiber seat arranged on the side wall of the box body 1, a stainless steel slit 2 arranged at the position of the optical fiber seat, a collimating objective 3 corresponding to the position of the optical fiber seat, a plane grating 7 used for receiving parallel light behind the collimating objective 3, an imaging objective 6 used for receiving light beams dispersed by the plane grating 7 and a linear array CMOS photosensitive surface 5 used for receiving focusing light spots behind the imaging objective 6, wherein an optical filter support 4 is arranged between the imaging objective 6 and the linear array CMOS photosensitive surface 5, and an optical filter is arranged in the optical filter support 4. In the present embodiment, the imaging objective 6 is a concave mirror.

The optical filter support 4 is provided with a long circular hole parallel to the linear array CMOS photosensitive surface 5, a screw is arranged in the long circular hole to install the optical filter support 4 in the box body 1, and the position of the optical filter support 4 in the direction parallel to the linear array CMOS photosensitive surface 5 can be adjusted through the long circular hole.

The imaging objective 6 is arranged on the imaging objective support 8, an oblong hole facing the linear array CMOS photosensitive surface 5 is formed in the lower portion of the imaging objective support 8, and a screw is arranged in the oblong hole to install the imaging objective support 8 in the box body 1. When the mounting position of the imaging lens is adjusted, the distance between the imaging objective lens 6 and the linear array CMOS photosensitive surface 5 can be adjusted.

As shown in fig. 2, the imaging objective holder 8 includes a holder body 801 and a supporting plate 802 disposed on the holder body 801 through a rotating shaft 803, the imaging objective 6 is disposed on the supporting plate 802, and a damper is disposed between the rotating shaft 803 and the holder body 801. The tilt angle of the imaging objective 6 can be adjusted by adjusting the angle of the blade 802.

The collimator objective 3 is arranged on a collimator objective bracket 9, an oblong hole facing the stainless steel slit 2 is formed in the lower portion of the collimator objective bracket 9, and a screw is arranged in the oblong hole to install the collimator objective bracket 9 in the box body 1.

The plane grating 7 is arranged on the plane grating support, an arc-shaped hole is arranged below the plane grating support, a screw is arranged in the arc-shaped hole to install the plane grating support in the box body 1, and the angle between the plane grating 7 and the imaging objective lens 6 can be adjusted.

A light blocking sheet 10 is arranged between the plane grating 7 and the filter support 4, and a light blocking sheet 10 is also arranged below the collimating objective 3, so that stray light can be blocked.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A portable spectrometer is characterized by comprising a box body (1), an optical fiber seat arranged on the side wall of the box body (1), a stainless steel slit (2) arranged on the box body (1) and positioned at the position of the optical fiber seat, a collimating objective lens (3) corresponding to the position of the optical fiber seat, a plane grating (7) used for bearing parallel light behind the collimating objective lens (3), an imaging objective lens (6) bearing light beams dispersed by the plane grating (7) and a linear array CMOS photosensitive surface (5) bearing focusing light spots behind the imaging objective lens (6).

2. A portable spectrometer according to claim 1, characterised in that a filter holder (4) is provided between the imaging objective (6) and the linear array CMOS photosurface (5), the filter holder (4) having a filter mounted thereon.

3. The portable spectrometer according to claim 2, wherein the filter holder (4) is provided with an oblong hole parallel to the linear array CMOS photosurface (5), and screws are provided in the oblong hole to mount the filter holder (4) in the case (1).

4. The portable spectrometer according to claim 1, wherein the imaging objective (6) is mounted on an imaging objective holder (8), the imaging objective holder (8) is provided with an oblong hole facing the linear array CMOS photosurface (5), and a screw is provided in the oblong hole to mount the imaging objective holder (8) in the case (1).

5. A portable spectrometer as claimed in claim 4, characterised in that the imaging objective holder (8) comprises a holder body (801) and a support plate (802) arranged on the holder body (801) by means of a rotation shaft (803), the imaging objective (6) being arranged on the support plate (802), the rotation shaft (803) and the holder body (801) being damped.

6. A portable spectrometer according to claim 1, characterised in that the collimator objective (3) is mounted on a collimator objective holder (9), that an oblong hole is provided in the collimator objective holder (9) towards the stainless steel slit (2), and that screws are provided in the oblong hole to mount the collimator objective holder (9) in the housing (1).

7. The portable spectrometer according to claim 1, wherein the planar grating (7) is mounted on a planar grating support, wherein the planar grating support is provided with an arc-shaped hole, and a screw is arranged in the arc-shaped hole to mount the planar grating support in the case (1) and to adjust the angle between the planar grating (7) and the imaging objective (6).

8. A portable spectrometer according to claim 1 or 4, characterised in that the imaging objective (6) is a concave mirror.

9. A portable spectrometer according to claim 2, characterised in that a light barrier (10) is provided between the plane grating (7) and the filter holder (4), the light barrier (10) being provided below the collimator objective (3).