Device for estimating absolute light responsivity of photomultiplier tube under low light intensity condition

A photomultiplier tube and photoresponse technology, applied in the field of optical measurement, can solve the problem of insufficient estimation of photomultiplier tube photoresponsivity, etc., and achieve the effect of eliminating wavelength and time dependence and eliminating laser drift effect.

Pending Publication Date: 2017-08-25
JINHUA VOCATIONAL TECH COLLEGE
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Problems solved by technology

The defect of the current existing technology is that the estimation of the absolute photoresponsivity and the measurement of the linearity are carried out separately, and it is only for a certain spectral range or a certain narrow optical power range, relying on

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  • Device for estimating absolute light responsivity of photomultiplier tube under low light intensity condition

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Embodiment Construction

[0019] Such as figure 1 It is a schematic diagram of the present invention, which mainly includes laser 1, attenuator I2, dark box 3, beam splitter I4, attenuator II5, plane mirror I6, shutter I7, shutter II8, plane mirror II9, beam splitter II10, dark box 11, silicon photodiode 12 , Photomultiplier tube 13 to be tested, the beam splitter I4, attenuator II5, plane mirror I6, shutter I7, shutter II8, plane mirror II9, beam splitter II10, cassette 11, silicon photodiode 12, photomultiplier tube 13 to be tested All are located in the dark box 3, the silicon photodiode 12, the photomultiplier tube 13 to be tested are located in the dark box 11, the laser 1 emits laser light through the attenuator I2 to the beam splitter I4, and the laser 1 The attenuator I2, the beam splitter I4, the shutter I7, the plane mirror II9, the beam splitter II10, and the silicon photodiode 12 constitute the optical path I. The laser 1, the attenuator I2, the beam splitter I4, the attenuator II5, the pla...

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Abstract

The invention relates to the field of optical measurement, a device for estimating the absolute light responsivity of a photomultiplier tube under low light intensity conditions, mainly comprising a laser, an attenuator I, a dark box, a beam splitter I, an attenuator II, a plane mirror I, a shutter I, Shutter II, plane mirror II, beam splitter II, cassette, silicon photodiode, photomultiplier tube to be tested, said beam splitter I, attenuator II, plane mirror I, shutter I, shutter II, plane mirror II, beam splitter II , cassette, silicon photodiode, and photomultiplier tube to be measured are all located in the dark box, and the silicon photodiode and photomultiplier tube to be measured are located in the cassette, composed of laser, attenuator I, beam splitter I, shutter I, plane mirror II, Beam splitter II and silicon photodiode form optical path I, which consists of laser, attenuator I, beam splitter I, attenuator II, plane mirror I, shutter II, beam splitter II, and silicon photodiode. I. The attenuator II has a certain angle with the optical axis of the measurement system.

Description

Technical field [0001] The invention relates to the field of optical measurement, in particular to a device for estimating the absolute light response rate of a photomultiplier tube under low light intensity conditions by using nonlinear correction to estimate the absolute light response rate of a photomultiplier tube. Background technique [0002] The measurement of extremely low-power light plays an important role in scientific research and industrial applications, such as astronomical observation, nuclear radiation detection, bioluminescence detection, and spectroscopy measurement. Photomultiplier tubes are used in photodetectors to measure the visible light region. Low-power light; the most common method for accurately measuring absolute light responsivity is to compare the measurement results of the detector under test with the data of a calibrated reference light source or photodetector. The disadvantage of the current existing technology is that the estimation of absolute ...

Claims

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 赵永建方晓华张向平
Owner JINHUA VOCATIONAL TECH COLLEGE
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