CN200972457Y

CN200972457Y - Investigater for ultraviolet transmissivity

Info

Publication number: CN200972457Y
Application number: CN 200620108269
Authority: CN
Inventors: 朱安生
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-28
Filing date: 2006-09-28
Publication date: 2007-11-07
Anticipated expiration: 2016-09-28

Abstract

The utility model relates to a transmittance tester of ultraviolet ray, which comprises a radiation source, a testing device of transmittance of ultraviolet ray and a computer. The tester of transmittance of ultraviolet ray comprises an integrating sphere, a cosine receiver, first optical fiber spectrometer, and second optical fiber spectrometer. The integrating sphere is provided with a reference hole and a sample hole. The reference aperture optical fiber connects with the first optical fiber spectrometer; the sample hole connects with the cosine receiver. The cosine receiver is joined with the second optic fiber, the radiation source via optic fiber, and first optical fiber spectrometer and the second optical fiber spectrometer connect with the computer respectively. This utility model truthfully simulates the sunlight under natural conditions and adopts the dual light reference optical paths of reference optical path and sample optical path, which overcomes the errors caused by the radiation source and features in high accuracy; the adoption of optical fiber spectrometer significantly reduces testing time; the switch optical filter can be used to detect the fluorescent effects of the samples that contain fluorescent substances.

Description

A kind of ultraviolet ray transmissivity tester

(1) technical field

The utility model relates to a kind of ultraviolet ray transmissivity tester.

(2) background technology

Along with people to the further understanding of ultraviolet ray to human body harm; countries such as Australia, New Zealand, America and Europe proposed must possess certain anti-uv-ray at products such as textile, cosmetics, sunglasses, umbrellas in recent years in succession, the safety of protection human body.To this requirement, domesticly formulated corresponding GB, but relevant detection ability and research and development of products also do not reach corresponding horizontal therewith yet.Existing ultraviolet ray transmissivity tester principle of work is as shown in Figure 1: UV ray radiation source provides sufficient and stable ultraviolet radiation energy for test.Monochromator is with the ultraviolet radiation energy dispersion of radiation source, so that carry out spectral measurement.Integrating sphere can calculate the spectral radiant flux by all directions of sample outgoing (direct projection and diffusion).Detecting device is that photomultiplier is formed, and after amplification and handling, the input computing machine carries out the last processing of signal with signal.On the structure as can be seen, but this instrument is the combination that a ultraviolet light photometer adds integrating sphere basically, be not the real simulated natural light, ultraviolet vertical irradiation is to sample, and different surface configuration (as the texture of weaving face fabric) will produce very big error.And owing to adopt light sensor and monochromator to cooperate, drive motor need carry out wavelength detection one by one when the test transmitance, and length consuming time especially when doing various product, needs drive motor repeatedly, loses time, and error is also increasing.

(3) utility model content

The purpose of this utility model is to provide a kind of simple in structure, ultraviolet ray transmissivity tester that accuracy of measurement is high.

Described ultraviolet ray transmissivity tester, comprise radiation source, transmitance pick-up unit and computing machine, described transmitance pick-up unit comprises integrating sphere, cosine receiver, first fiber spectrometer, second fiber spectrometer, integrating sphere is provided with reference hole and sample well, reference aperture optical fiber connects first fiber spectrometer, sample well connects the cosine receiver, the cosine receiver connects second fiber spectrometer through optical fiber, and radiation source, first fiber spectrometer, second fiber spectrometer connect computing machine respectively.

Integrating sphere of the present utility model is different with integrating sphere effect of the prior art, and the utility model adopts the purpose of integrating sphere to be that the light that makes radiation source send becomes diffuse light behind integrating sphere, make radiation direction identical with natural light.Fiber spectrometer adopts grating beam splitting, and the irradiate light of each wavelength can directly detect the light intensity of each wavelength to the CCD detecting device.And fiber spectrometer can be finished test and calculating to sample in several seconds, was to test the fastest instrument of UPF now, shortened greatly than test duration of classic method.The principle of work of fiber spectrometer is at first by measuring in the sunshine UV-A and each wavelength ultraviolet ray of UV-B wave band to the transmitance of sample, blocks coefficient UPF in conjunction with erythema dose (ED) spectrum influence power and solar spectrum radiancy calculating ultraviolet relatively.

Further, be provided with the switchable optical filter that only allows ultraviolet ray to see through between described cosine receiver and the sample well.When being used for testing the fluorescent effect of the sample that contains fluorescent material, make to see through respectively behind the sample light by and obstructed filtration mating plate, the difference that obtains by twice test can calculate the fluorescent effect of sample.This optical filter can adopt the structure by the driven by motor rotation.

Further again, described radiation source is a pulse xenon lamp.The utility model adopts pulse xenon lamp and integrating sphere to come the sunshine of simulating nature situation, and the mode that adopts pulse is in order to reduce the heat variation that rising causes to specimen Yin Wendu that xenon lamp produces as far as possible; Xenon lamp is near the lamp source of sunshine spectrum, and colour temperature is 6000K, and is consistent with the colour temperature at high noon in summer; The light that xenon lamp sends becomes diffuse light behind integrating sphere, identical with natural light.

When the utility model was used to test, sample placed between sample well and the cosine receiver, and when being provided with optical filter between cosine receiver and the sample well, sample places between sample well and the optical filter.The light that pulse xenon lamp sends directly enters integrating sphere, repeatedly the reflection back is penetrated from sample well and reference hole in ball, form the diffuse reflection light source, the light in reference hole enters silica fibre to fiber spectrometer, the light that sample well penetrates becomes scattered light behind sample, focus on silica fibre with the cosine receiver and arrive fiber spectrometer again, fiber spectrometer carries out incident light beam split and detects the light intensity of each wavelength through grating, and final data is fed to Computer Processing.Computing machine provides functions such as the required power supply, control signal, conversion of signals of pulse xenon lamp and fiber spectrometer simultaneously.Obvious computing machine of the present utility model should be made broad understanding, as long as wherein contain control module, data processing module, display module, can think computing machine of the present utility model.

The utility model adopts integrating sphere to simulate the sunshine of natural situation truly, adopts the twin-beam light path of reference light paths and sample test light path, has overcome the error that radiation source causes, the accuracy of measurement height; Adopt fiber spectrometer to shorten the test duration greatly; Adopt switchable optical filter can be used for testing the fluorescent effect of the sample that contains fluorescent material.

(4) description of drawings

Fig. 1 is the fundamental diagram of prior art middle-ultraviolet lamp transmission measurement instrument.

Fig. 2 is the structural representation of ultraviolet ray transmissivity tester of the present utility model.

(5) embodiment

The utility model is described in further detail below in conjunction with embodiment, but protection domain of the present utility model is not limited to this.

With reference to Fig. 2, a kind of ultraviolet ray transmissivity tester, comprise radiation source, transmitance pick-up unit and computing machine, described transmitance pick-up unit comprises integrating sphere, cosine receiver, first fiber spectrometer, second fiber spectrometer, integrating sphere is provided with reference hole and sample well, reference aperture optical fiber connects first fiber spectrometer, sample well connects the cosine receiver, the cosine receiver connects second fiber spectrometer through optical fiber, and radiation source, first fiber spectrometer, second fiber spectrometer connect computing machine respectively.Be provided with the switchable optical filter that only allows ultraviolet ray to see through between cosine receiver and the sample well.Radiation source is a pulse xenon lamp.

When the utility model was used to test, sample placed between sample well and the optical filter.The light that pulse xenon lamp sends directly enters integrating sphere, and repeatedly the reflection back is penetrated from sample well and reference hole in ball, forms the diffuse reflection light source; The light in reference hole enters silica fibre to fiber spectrometer; The light that sample well penetrates becomes scattered light behind sample, focus on silica fibre again to fiber spectrometer by the cosine receiver again, and fiber spectrometer carries out incident light beam split and detects the light intensity of each wavelength through grating, and final data is fed to Computer Processing.

The fluorescent effect of specimen if desired, pass through optical filter as long as make through the light behind the sample, elimination can be delustered, and only allows ultraviolet ray to pass through, and recording data when recording the obstructed filtration mating plate of numerical value and light carries out the fluorescent effect that computing can obtain sample.

Claims

1, a kind of ultraviolet ray transmissivity tester, comprise radiation source, transmitance pick-up unit and computing machine, it is characterized in that: described transmitance pick-up unit comprises integrating sphere, cosine receiver, first fiber spectrometer, second fiber spectrometer, integrating sphere is provided with reference hole and sample well, reference aperture optical fiber connects first fiber spectrometer, sample well connects the cosine receiver, the cosine receiver connects second fiber spectrometer through optical fiber, and radiation source, first fiber spectrometer, second fiber spectrometer connect computing machine respectively.

2, ultraviolet ray transmissivity tester as claimed in claim 1 is characterized in that being provided with between described cosine receiver and the sample well the switchable optical filter that only allows ultraviolet ray to see through.

3, ultraviolet ray transmissivity tester as claimed in claim 1 or 2 is characterized in that described radiation source is a pulse xenon lamp.