Parallel light accessories
A technology of parallel light and accessories, which is applied in the direction of material analysis, measuring device, and instrument by optical means, can solve the problems such as the decrease in the accuracy of measurement transmittance, and achieve the effect of simple structure and improved measurement accuracy.
Active Publication Date: 2016-04-06
天津港东科技股份有限公司
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Problems solved by technology
[0003] However, in the actual application environment, the tested samples are relatively thick. The tablet method is used to measure common solid samples. As the thickness and refractive index of the sample increase, the accuracy of measuring the transmittance drops sharply. For example, when measuring a germanium sheet with a thickness of 2.5mm, the fluctuation range of the measured value of most FTIR products sold in the market reaches 5%T, or even greater
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[0014] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. Such as figure 1 As shown, a parallel light accessory includes a base plate 1 on which a first reflector 2, a second reflector 3, a first aspheric reflector 4, a second aspheric reflector 5, and a first oblate sphere are installed on the base plate. mirror 6 and the second oblate spherical mirror 7. In the present invention, the optical system of the entire accessory is mirror-symmetrical with the center of the sample chamber, specifically as follows, the first mirror 2 and the second mirror 3 are arranged in parallel, and the first aspheric mirror 4 and the The second aspheric mirror 5 is arranged in parallel, and the first oblate spherical mirror 6 and the second oblate spherical mirror 7 are arranged in parallel. The first oblate mirror 6 is located on the opposite side of the first reflector 2, the ...
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Abstract
The invention relates to an accessory of a spectrometer and particularly relates to a parallel-light accessory. The parallel-light accessory comprises a bottom plate, wherein the bottom plate is provided with a first reflecting mirror, a second reflecting mirror, a first aspheric reflecting mirror, a second aspheric reflecting mirror, a first flat spherical mirror and a second flat spherical mirror; the first flat spherical mirror is arranged on the opposite side of the first reflecting mirror; the first aspheric reflecting mirror is arranged on the left side of the first reflecting mirror; the second aspheric reflecting mirror is arranged on the opposite side of the first aspheric reflecting mirror; the second flat spherical mirror is arranged on the left side of the first aspheric reflecting mirror; the second reflecting mirror is arranged on the opposite side of the second flat spherical mirror; a sample rack is arranged between the first aspheric reflecting mirror and the second aspheric reflecting mirror. The accessory has the advantages that the structure is simple; since the sample rack is vertical to the collimated parallel light, the position of the emergent light and the energy to a DTGS (Deuterated Tri-Glycine Sulfate) receiver are not influenced, so that the measuring accuracy of transmittance can be improved.
Description
technical field [0001] The invention relates to an accessory of a spectrometer, in particular to a parallel light accessory. Background technique [0002] Such as figure 2 As shown, when the existing FTIR (Fourier Transform Infrared Spectrometer) measures the transmittance of a sample, generally the infrared light is directly converged and passes through the sample on the sample holder to directly measure the transmittance of the sample. The infrared light 10 is converged to the center of the sample chamber 11 , and then converged to the DTGS receiver 13 through the aspheric mirror 12 . Since the infrared light is not vertically incident on the sample 14, the infrared light will cause the refraction shift of the infrared light after passing through the sample, so that the position of the converging light spot on the receiver will be affected to a certain extent, which will cause energy fluctuations and bring about a transparent Rate measurement error. Therefore, the short...
Claims
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IPC IPC(8): G01N21/01
Inventor 王波
Owner 天津港东科技股份有限公司