JPS61281940A - Multiwavelength photometric device for analysis - Google Patents

Abstract

PURPOSE:To lead many kinds of spectral light to a measuring cell without being affected by external circumstances by connecting the exit position of a spectroscope and a rotating mirror with plural optical fibers. CONSTITUTION:The light from a light source 3 is separated into components having wavelengths lambda1-lambda5 by a spectroscope 2 and they are irradiated to one incidence ends of optical fibers 4a-4e respectively. Beams of light having individual wavelengths are transmitted in optical fibers 4a-4e without being affected by the external atmosphere and are emitted from the other exit ends arranged circularly on a base body 5. A rotating mirror 6 which scans exit ends of optical fibers 4a-4e makes emitted spectral beams of light incident on a beam splitter 8 successively by a fixed mirror 7. Since a photodetector 9 detects directly the light from the beam splitter 8 and a photodetector 10 detects the light transmitted through a measuring cell 11, the difference between outputs from photodetectors 9 and 10 is detected to measure the absorbance of a sample of spectral beams of light having wavelengths lambda1-lambda5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an absorption analyzer, and more particularly to a technique for guiding spectral light from a light source to an analysis cell.

A prior art absorption analyzer analyzes components contained in a sample by dividing light from a light source and irradiating it onto a measurement cell, and measuring the absorbance of the light that has passed through the measurement cell. The accuracy of the analysis greatly depends on the atmosphere in the optical path.

To solve this problem, a one-spectrometry method has been proposed, but because the number of transmitted spectral lights is small, it cannot be used for analyzes that require photometry using multiple wavelengths, such as biological samples. □ In view of these problems, the present invention aims to provide a multi-wavelength measurement device for analysis that can guide various types of spectral light to a measurement cell without being affected by the external environment. Purpose-
shall be.

20. Structure of the invention, ie, the feature of the present invention is that the emission position of the spectroscopic means and the scanning means are connected by a plurality of light guide members.

E. Embodiments The details of the present invention will be explained below based on illustrated embodiments.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 indicates a light guiding means which is a characteristic part of the present invention. +r/F
7F 1++ 11) 1. Optical fibers 4a, 4b, 4c, 4d, 4 are installed in each of the Kiss Samurai stores.
The - end of e is arranged, and the optical fiber 4a.

The other ends of 4b, 4c, 4d, and 4e are disposed on the base 5 in a circular shape. Reference numeral 6 denotes a rotating mirror that scans the output ports of the optical fibers 4a, 4b, 4C14d, 4e by a motor (not shown);
, 4e are sequentially emitted from the fixed fi7
The beam is configured to be incident on the beam splitter 8. 9.10 are photodetectors, one of which is arranged to directly detect the light from the beam splitter 8, and the other detector 10 is arranged to detect the light transmitted through the measurement cell 11. ing.

In this embodiment, when the device is activated, the light from the light source 3 is transmitted through the spectrometer 2 into a plurality of wavelengths □, λ2. Enter 3, Enter 4. The optical fibers 4a and 4b are separated for each wavelength by the input S.
, 4C14d, 4e+7) Irradiate the entrance. Optical fibers 4a, 4b.

Each wavelength λ□...
- The input light 5 is transmitted through each of the optical fibers 4a to 4e, and exits from the other end of the optical fibers 4a to 4e without being affected by the external atmosphere or the like. optical fiber 4
The lights of each wavelength emitted from a to 4e are sequentially scanned by a rotating mirror 6 and passed through a beam splitter 8, one of which is directly detected by a light detector 9, and the other which detects absorption by a sample in a measurement cell ll. and enters the photodetector 10. As a result, when the difference between the outputs from the photodetector 9 and the photodetector 10 is detected, the wavelength input 1. λ2. It is possible to measure the absorbance of a sample using spectral light of λ3, 4° and λ5.

FIG. 2 shows another embodiment of the present invention, in which one end of a plurality of optical fibers 12a, 12b, . . . 12n is arranged in a straight line, and the other end is arranged in a cylindrical shape. According to this embodiment, a large number of spectral lights from the spectroscope can be rearranged in a circular shape and emitted to the scanning mirror without being affected by the external environment.

Effects As explained above, according to the present invention, the ends of the plurality of optical fibers are disposed on the output side of the spectrometer in the spectroscopic direction, and the other ends are disposed facing the scanning means. Not only can the necessary multiple wavelengths of light be input into the measurement cell without being affected by the external environment, the components of the sample can be analyzed with high precision using multiple wavelengths of spectral light, but also it can be easily analyzed using a single spectrometer. The optical path configuration over the scanning mirror can be simplified.

[Brief explanation of the drawing]

tJIJ1 Figure 1 is a configuration diagram of an apparatus showing one embodiment of the present invention, and Figure 2 is a perspective view showing another embodiment of the present invention. 1...Light guide means 2...Spectroscope 3...Light 11A 4a-4e...Optical fiber 11.
...Measurement cell

Claims (1)

[Claims] A multi-wavelength analytical multi-wavelength analyzer comprising one of a plurality of light guides disposed at each of the spectral light emission positions of the spectroscopy means, and the other end of the light guide being disposed opposite to the scanning means for guiding light to the measurement cell. Photometric device.