Spectrometer and spectrum detecting device

Abstract

Embodiments of the present invention disclose a spectrometer and a spectrum detecting device, which relate to a substance detecting technology, which is more advantageous for miniaturization of a spectrometer, and further, compared with the prior art, a smaller volume can obtain the same or higher sensitivity as the prior art. Sex, while improving spectral resolution and spectral measurement range. The spectrometer comprises: a spatial filter component, a beam splitting device, a collimating component disposed on the optical wave input optical path of the spectroscopic device, and a focusing component and a sensor disposed on the optical wave output optical path of the spectroscopic device; the collimating component is disposed in the spatial filter component And a beam splitting device, the focusing component is disposed between the beam splitting device and the sensor; the collimating component is configured to adjust a focal length of the light wave on the light incident light pathof the light splitting device in a range of a focal length; and / or the focusing component is further used in Adjusting the focal length of the light wave on the light path of the light splitting device in the second focal length range.

Description

technical field [0001] Embodiments of the present invention relate to substance detection technology, and in particular to a spectrometer and spectrum detection equipment. Background technique [0002] The current spectral detection equipment usually consists of a probe and a spectrometer. Among them, the spectrometer is basically formed based on a reflection structure or a transmission structure of an ordinary lens group (lens). The realization principle of a spectrometer based on a reflection structure is as follows: After filtering, the following processing is carried out. The collimating mirror collimates the light and then enters the grating for light splitting. The focusing mirror focuses the spectrum separated by the grating onto the sensor surface; the realization principle of the spectrometer based on the ordinary lens group (lens) structure is as follows: The light transmitted by the probe is spatially filtered and processed as follows. The collimator and transmiss...

AI Technical Summary

Problems solved by technology

[0003] For reflective structure spectrometers, the main optimization parameters in the entire spectroscopic instrument are the curvature and angle of the mirror, and the angle of the grating. There are too few variables. In order to correct aberrations, the light energy can only be sacrificed and the F number increased. The F-number of the reflective spectrometer is F / 4, and the problems brought by the reflective spectrometer are: the adjustment mechanism is complicated, the optical paths cross or there is a shared space, which is not convenient for modular design, resulting in the inability to reduce the size and weight; in addition, the focal length of the reflector is not easy to adjust , resulting in low production efficiency; few optimization variables, aberration cannot be effectively corrected, and it is not easy to improve resolution; large F number, low light energy, low spectrometer sensitivity, and slow detection speed

[0004] For the transmission-type ordinary lens group / lens, the focal length of the lens group / lens is less than the length of the entire lens barrel. Due to the volume limitation of the spectrometer, the focal length of the lens is small, resulting in low resolution and insufficient use of the sensor phase.

[0005] In short, the existing technology is not conducive to the miniaturization of the spectrometer, and the sensitivity, spectral resolution and spectral measurement range of the spectrometer are severely limited by the volume

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