CN203364972U

CN203364972U - Test device capable matching with equal energy spectrum curve

Info

Publication number: CN203364972U
Application number: CN 201320313213
Authority: CN
Inventors: 赵晶; 张丛森
Original assignee: NANJING SIBEIXIER TESTING TECHNOLOGY Co Ltd
Current assignee: Nanjing Baoguang Inspection Technology Co ltd
Priority date: 2013-05-29
Filing date: 2013-05-29
Publication date: 2013-12-25
Anticipated expiration: 2023-05-29

Abstract

The utility model discloses a test device capable of matching with an equal energy spectrum curve. The test device comprises an adjustable-power light source, a band pass filter, a band pass spectrum light source, and an integrating ball, wherein the adjustable-power light source and the band pass filter are connected, the band pass spectrum light source and the integrating ball are connected, and the light source output from the integrating ball is around one end of the integrating ball. The test device can conveniently and quickly test the transmission characteristics, absorption characteristics and reflection characteristics of different objects, and the luminous intensity accuracy of the spectrum instrument is improved.

Description

A kind of test unit that mates the equal-energy spectrum curve

Technical field

The utility model relates to a kind of test unit that mates the equal-energy spectrum curve, particularly adopts a plurality of independent illuminating sources, after the mixed light system, through the wave band optical filter, produces continuous equal-energy spectrum curve, belongs to the Technology of Precision Measurement field.

Background technology

Equal-energy spectrum refers to that spectral power distribution its relative intensity in all band scope is even and approaches a kind of spectrum that ceiling capacity distributes.

Generally the spectral intensity of light source changes in different wavelength range.As the A light source that Fig. 1 colour temperature is 2856K, the spectrum response curve constantly strengthens with the increase of wavelength.Energy distribution relative mistake between its maximal value and minimum value is very large, and this species diversity, when light absorption and reflection characteristic measurement, can cause the change of absorbance accuracy A and transmittance accuracy T.As shown in Figure 1, maximum absorption wave strong point value of molar maximum, the sensitivity of analytical test is the highest, maximum extinction wavelength place, the absorbance absolute error diminishes.If get △ λ 1=△ λ 2 select the left sides tiltedly certain some place at shoulder place as test wavelength, the corresponding absorbance difference of △ λ 2 is △ A2, if select the maximum absorption band place as test wavelength, obviously, △ A1<△ A2 explanation wavelength location difference when identical wavelength measurement, the size that test result absorbance absolute error changes is also different, so select maximum absorption wavelength as test wavelength, otherwise the test error that can cause increases.

Can find out in Fig. 3 that its dynamic range of light intensity that wavelength is λ 1 is minimum, signal to noise ratio (S/N ratio) is the poorest, Photometric Accuracy is measured the relative error maximum.Can affect the accuracy of measurement of whole spectrum segment.And under the equal-energy spectrum curve state shown in Fig. 3, because its spectral intensity is basic identical, its linear dynamic range is the widest, the spectrum measurement resultant error of different-waveband is basically identical, the affect minimum of parasitic light on measurement result, improve photoelectric transformation efficiency (sensitivity), can be good at suppressing the impact of noise on measurement result, therefore can greatly improve the Photometric Accuracy of spectral instrument.

For realizing the coupling of equal-energy spectrum curve, at first the spectrum of each light source is the continuous and whole whole spectral band that covers, and the power of each light source can be adjusted separately, and purpose is that light intensity can be mated as required mutually.

Adopt bandpass filter, can selectively weaken the light intensity of subband with the coupling equal-energy spectrum.

The utility model content

The purpose of this utility model is the mixed light system with a plurality of illuminating sources, realizes coupling equal-energy spectrum curve.

The technical scheme addressed the above problem is: a kind of test unit that mates the equal-energy spectrum curve, comprise power-adjustable light source, bandpass filter, the logical spectroscopic light source of band, integrating sphere, described power-adjustable light source is connected with described bandpass filter, the logical spectroscopic light source of described band is connected with integrating sphere, is surrounded on an end of described integrating sphere through the light source of described integrating sphere output.

The utility model has the advantage of that the utility model provides a kind of by the combination of a plurality of illuminating sources, mate the equal-energy spectrum curve through the power adjustment of light source and the mode of employing wave band optical filter, can carry out easily and efficiently the test of transmissison characteristic, absorption characteristic and the reflection characteristic of all kinds of different objects, improve the Photometric Accuracy of spectral instrument.

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The accompanying drawing explanation

Fig. 1 is approximate equal-energy spectrum and A light source light spectrum schematic diagram;

Fig. 2 is for adopting bandpass filter to choose the spectrum schematic diagram of wave band from the spectrum spectral coverage;

The logical spectrum schematic diagram of the band that Fig. 3 is the final specific band obtained;

Fig. 4 is the utility model schematic diagram.

Embodiment

In order to deepen understanding of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, and this embodiment only, for explaining the utility model, does not form the restriction to the utility model protection domain.

Shown in Figure 4, the utility model provides a kind of test unit that mates the equal-energy spectrum curve, comprise: comprise power-adjustable light source, bandpass filter, the logical spectroscopic light source of band, integrating sphere, described power-adjustable light source is connected with described bandpass filter, the logical spectroscopic light source of described band is connected with integrating sphere, is surrounded on an end of described integrating sphere through the light source of described integrating sphere output.

One group of illuminating source with bandpass filter, be connected with an end of integrating sphere.

Each source light through bandpass filter, be radiated at integrating sphere surface simultaneously and form mixed light.Light is after integrating sphere, and detector is accepted in horizontal direction.

According to the light intensity of spectrometer measurement, the power of adjusting each light source makes each light source light intensity mutually mate.

Add bandpass filter, weaken part high light spectrum, with the light intensity in balanced spectral band.

Change sample and reflection windows, under the equal-energy spectrum curve, measure sample.

It is a kind of by the combination of a plurality of illuminating sources that the utility model provides, and through the power adjustment of light source and the mode of employing wave band optical filter, mates the equal-energy spectrum curve.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a test unit that mates the equal-energy spectrum curve, it is characterized in that: comprise power-adjustable light source, bandpass filter, the logical spectroscopic light source of band, integrating sphere, described power-adjustable light source is connected with described bandpass filter, the logical spectroscopic light source of described band is connected with integrating sphere, is surrounded on an end of described integrating sphere through the light source of described integrating sphere output.