Quantum dot array spectrum sensor

Abstract

The invention discloses a quantum dot array spectrum sensor, comprising: a quantum dot colloidal array film and an array photoelectric detector; the quantum dot colloidal array film is used for bearing a quantum dot colloidal array; the quantum dot colloidal array includes a plurality of quantum dot colloidal units, wherein at least one quantum dot colloidal unit has a different absorbing or transmitting spectrum from other quantum dot colloidal units; the side of the quantum dot colloidal array film bearing the quantum dot colloidal array is opposite to a light-sensing side of the array photoelectric detector; after measured light of measured spectrum irradiates the quantum dot colloidal array film, transmitting light passing through the quantum dot colloidal array is detected by the light-sensing side. With the cooperation of the quantum dot colloidal array and the array photoelectric detector, the quantum dot array spectrum sensor has great bandwidth, high wavelength resolution and good sensitivity to weak light, and properties of existing instruments are improved greatly.

Description

technical field [0001] The invention relates to a spectrum detection sensor, in particular to a quantum dot array spectrum sensor. Background technique [0002] The quantum dot array spectral sensor is a sensor used to measure the spectrum in the ultraviolet-visible-infrared band. Spectrum measuring instruments on the existing market are mainly divided into two categories, one is based on the principle of dispersion, using dispersive optical elements such as gratings to separate different wavelength components in the measured light in space, and then using photoelectric sensors to measure each wavelength component The light intensity, so as to obtain the spectral information of the measured light, such as figure 1 As shown, the measured light 11 is firstly reflected to the grating 13 by the reflector 12, and the grating 13 separates the different wavelength components in the measured light 11 in space, and then reflected by the reflector 14 to the photoelectric sensor 15, a...

AI Technical Summary

Problems solved by technology

[0003] For spectral measuring instruments based on the principle of dispersion, since the light of different wavelength components needs to be transmitted for a certain distance before they can be clearly separated, their size is limited by the effective optical path, making it difficult to miniaturize; for spectral measuring instruments based on narrow-band optical filters , its spectral measurement range is limited by the dynamic range of the filter, it is difficult to achieve high-bandwidth spectral measurement, and most of the energy in the measured light is blocked by narrow-band filters, so it is also difficult to achieve low-power spectral measurement

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