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Multiband ultraviolet illuminometer free of light filter

A filterless, multi-band technology, applied in the field of measurement, can solve the problems of bulky detector head, poor stability of fluorescent materials, accumulation of filter errors, etc., and achieve the effect of small size, high sensitivity and fast response speed

Inactive Publication Date: 2006-09-06
UNIV OF SHANGHAI FOR SCI & TECH +1
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Problems solved by technology

In the first solution, the spectral response peak of the silicon photodiode is in the visible light region, and a multi-layer filter must be added in front of the detector to reduce (or eliminate) the influence of visible light and infrared light on the measurement results. If you choose the UV band for measurement, you need to add filters with different bandwidths (UVA, UVB or UVC bands), which not only increases the cost, but also the detector head is bulky, and due to the accumulation of filter errors, The measurement accuracy is poor
The second solution, because the stability of the fluorescent material is poor, and only a certain wavelength range of ultraviolet light can emit light, the accuracy is even more difficult to guarantee

Method used

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  • Multiband ultraviolet illuminometer free of light filter
  • Multiband ultraviolet illuminometer free of light filter
  • Multiband ultraviolet illuminometer free of light filter

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Embodiment Construction

[0036] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0037] Such as figure 1 As shown, a kind of filterless multi-band ultraviolet illuminance meter provided by the embodiment of the present invention includes:

[0038] An ultraviolet detector, which encapsulates three sensitive elements A, B and C with responses in different ultraviolet bands, which are used to measure the intensity of ultraviolet radiation in three different ultraviolet bands;

[0039] Three pre-amplification circuits are respectively connected to the output ends of the sensitive elements responding to three different ultraviolet bands, and are used for the pre-amplification of the sensitive element measuremen...

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Abstract

The disclosed illuminometer comprises: an UV detector with three AlGaN-base elements A, B, and C with different band response; a front-end amplifying circuit, a programmable band-selection and calculation circuit, an ADC, and a MCU with control input end connected to a keyboard and control output end connected to the input end of former circuit and a LCD display.

Description

technical field [0001] The invention relates to measurement technology, in particular to a measurement technology of a radiometer capable of measuring ultraviolet radiation in UVA band, UVB band, UVC band and the entire UV band. Background technique [0002] Most of the traditional ultraviolet radiation meters use ultraviolet-enhanced silicon photodiodes as detectors to receive ultraviolet radiation for measurement; or add a layer of fluorescent material in front of ordinary silicon photodiodes, and the fluorescent materials are excited by ultraviolet rays to emit visible light. The photodiode receives the light signal and measures the ultraviolet radiation. In the first solution, the spectral response peak of the silicon photodiode is in the visible light region, and a multi-layer filter must be added in front of the detector to reduce (or eliminate) the influence of visible light and infrared light on the measurement results. If you choose the UV band for measurement, you...

Claims

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Application Information

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IPC IPC(8): G01J1/42G01J1/44
Inventor 庄松林瑚琦顾铃娟苏锦文侯建伟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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