Photonic crystal filtering and quantum dots spectral conversion-based solar-blind ultraviolet imaging device

Abstract

The invention belongs to the field of photoelectric imaging, and relates to a solar-blind ultraviolet imaging device, in particular to the preparation of a quantum dots spectral converter, wherein the solar-blind ultraviolet imaging device has high resolution and is convenient to carry. The invention discloses a photonic crystal filtering and quantum dots spectral conversion-based solar-blind ultraviolet imaging device, which comprises an ultraviolet imaging lens, the quantum dots spectrum converter, a CMOS (complementary metal oxide semiconductor) arranged close to the quantum dots spectrum converter, an image acquisition unit, a digital signal processor and a display, wherein the quantum dots spectrum converter comprises one-dimensional photonic crystal front filters which are arrayed in order, single-layer quantum dot layers which are arrayed in order and have the same size, and one-dimensional photonic crystal back filters. The solar-blind ultraviolet imaging lens, disclosed by the invention, has high resolution, is convenient to carry, and can work at the view angle of 0-30 degrees within the temperature range of 25-50 DGE C.

Description

technical field [0001] The invention belongs to the field of photoelectric imaging, and relates to a high-resolution and portable sun-blind ultraviolet imaging device, in particular to the preparation and design of a quantum dot spectrum converter. Background technique [0002] Sun-blind ultraviolet light refers to ultraviolet light with a wavelength in the range of 240-280nm. This part of ultraviolet light in sunlight is almost completely absorbed when it passes through the earth's atmosphere, so ultraviolet observation of targets in this wavelength range can avoid sunlight interference. . [0003] Solar-blind ultraviolet imaging has penetrated into all aspects of life, such as the field of high-voltage equipment discharge leakage detection. The solar-blind ultraviolet imager can quickly and safely detect the invisible ultraviolet arc generated by the discharge position, and then determine the location of the fault. Safety is very important; through ultraviolet imaging of ...

AI Technical Summary

Problems solved by technology

This type of solar-blind ultraviolet imager uses an image intensifier and a light cone to enhance the brightness of the object image, resulting in a large instrument size, which limits the integration and portability of the device; when electrons are multiplied in the image intensifier micro-channel plate, a certain high-voltage electric field is required , so there are certain requirements for the power supply of the instrument; the high number of electro-optical conversions leads to large additional noise and poor imaging quality; its resolution is limited by the number of micro-channels on the micro-channel plate and the number of light cones, and only one pixel can be accommodated in a single pixel size. optical fiber, poor imaging resolution; the filters used in this type of equipment are mainly black UV-transparent glass filters and UV filters designed based on film systems. Aging phenomenon occurs, and the thickness deviation of any layer of the UV filter based on the film system design during the preparation process will reduce the transmittance of the transmission band by 2% on average, and the practicality is limited.

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