CN211627357U

CN211627357U - Spectral imaging device

Info

Publication number: CN211627357U
Application number: CN201922363381.0U
Authority: CN
Inventors: 马庆; 匡翠方; 罗向东; 杨春雷
Original assignee: Jiangsu Dowell Photonics Technology Co ltd
Current assignee: Jiangsu Dowell Photonics Technology Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-10-02
Anticipated expiration: 2029-12-25

Abstract

A spectral imaging device is characterized in that a quartz optical fiber (6), an incident slit (7), a first lens (5), a collimating mirror (2), a grating (8), a condensing lens (1) and a CCD alignment detector (9) are sequentially arranged along a light transmission direction; an imaging lens (3) is arranged in front of the condenser lens (1), and a photomultiplier (4) is arranged between the imaging lens (3) and the CCD alignment detector (9). The utility model discloses a quartz fiber improves light transmission efficiency, improves the light imaging definition through photomultiplier.

Description

Spectral imaging device

Technical Field

The utility model relates to a spectral imaging device.

Background

A spectrometer (spectrometer) is a scientific instrument that decomposes light with complex components into spectral lines, and is composed of a prism or a diffraction grating, etc., and can measure light reflected by the surface of an object using the spectrometer. The optical signal is projected on the collimating objective lens through the incident slit, the divergent light is changed into quasi-parallel light to be reflected to the grating, and the spectrum is displayed on the receiving surface of the array receiver through the imaging reflector after dispersion to form a spectrum surface. The spectrum surface is not only the sequence arrangement of monochromatic light (having the influence of high-order spectrum), any tiny spectrum band in the whole spectrum is irradiated on the pixel of the corresponding detector, after the optical signal is converted into the electronic signal, the electronic signal is subjected to analog-digital conversion and A/D amplification, and finally the electronic signal is displayed and output by the control terminal of the electrical system. Thereby completing various spectral signal measurement analyses. The imaging of the spectrometer on the market at present is not clear enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a spectral imaging device, which is characterized in that a quartz optical fiber, an incident slit, a first lens, a collimating lens, a grating, a condensing lens and a CCD array detector are arranged in sequence along the light transmission direction; the collimating mirror is parallel to the grating. An imaging lens is arranged in front of the condenser lens, and a photomultiplier tube is arranged between the imaging lens and the CCD alignment detector.

The utility model discloses a quartz fiber improves light transmission efficiency, improves the light imaging definition through photomultiplier.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a condenser, 2, a collimating mirror, 3, an imaging lens, 4, a photomultiplier, 5, a first lens, 6, a quartz optical fiber, 7, an incident slit, 8, a grating and 9, a CCD alignment detector.

Detailed Description

As shown in fig. 1, a spectral imaging device is provided with a quartz optical fiber 6, an entrance slit 7, a first lens 5, a collimating mirror 2, a grating 8, a condenser lens 1 and a CCD alignment detector 9 in sequence along a light transmission direction; an imaging lens 3 is arranged in front of the condenser lens 1, and a photomultiplier tube 4 is arranged between the imaging lens 3 and the CCD alignment detector 9.

The collimating lens 2 is parallel to the grating 8, so that the structure is simplified and the manufacture is convenient.

The quartz optical fiber 6 has large numerical aperture, large optical fiber core diameter, high mechanical strength and good bending property, and is easy to couple with a light source. The quartz optical fiber 6 is adopted to enable the object to be measured to be separated from the limitation of the sample cell, the sampling mode becomes flexible, the sample spectrum source far away from the spectrum instrument is led to the entrance slit 7 by the optical fiber probe, electromagnetic leakage does not exist in the transmission process of the quartz optical fiber 6, line crosstalk is avoided, and the optical transmission efficiency is improved. The optical signal introduced by the quartz optical fiber 6 can also isolate the inside of the instrument from the external environment, can enhance the resistance to severe environments (humid climate, strong electric field interference and corrosive gas), ensures the long-term reliable operation of the spectrometer and prolongs the service life. The photomultiplier tube 4 can multiply and convert the weak optical signal into an electrical signal. The optical imaging clarity is improved by the photomultiplier tube 4.

Claims

1. A spectral imaging apparatus, characterized by: the system comprises a quartz optical fiber (6), an incident slit (7), a lens I (5), a collimating lens (2), a grating (8), a condensing lens (1) and a CCD alignment detector (9) which are sequentially arranged along the light transmission direction; an imaging lens (3) is arranged in front of the condenser lens (1), and a photomultiplier (4) is arranged between the imaging lens (3) and the CCD alignment detector (9).

2. A spectral imaging apparatus according to claim 1, wherein: the collimating mirror (2) is parallel to the grating (8).