JPH0324427A - Optical spectrum analyzing apparatus - Google Patents

Abstract

PURPOSE:To perform highly reliable spectrochemical analysis characterized by high functions by arranging a prism for polarizing light, arranging a photodiode array for measuring the intensity for every wavelength, and forming a unitary body with both parts. CONSTITUTION:A prism 1 polarizes light to be measured 2 for every wavelength. The polarized light is inputted into a photodiode array 3 which is in close contact with the prism 1. The analog output current for each bit in the array 3 is amplified in an amplifier 4, and the current is inputted into an A/D converter 5. The digital data are inputted into a CPU 6, and correction, processing and storage of the data are performed. The processed data are outputted into an output device 7. The data are positively used in the form most suitable for utilization. Since the optical system and the sensor are made to form a unitary body in this way, the compact and light configuration can be achieved, earthquake resistance is improved and the effect of no time-change is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to spectroscopic measurements in optics, and particularly to a light spectrum analyzer.

[Conventional technology]

Traditionally, spectral analysis of light involves polarizing each wavelength of light using a prism and then exposing a photographic plate to light. After development, the position was measured with a micrometer and analyzed.

[Problem that the invention attempts to solve]

The conventional light spectrum analyzer described above requires exposure and development of a photographic plate, and also requires reading the image of the original plate. For this reason, it requires a lot of time and tools to obtain data, and there are also errors when reading data from the original plate, resulting in low data reliability. Furthermore, since the measuring device is required to have high accuracy, a lot of man-hours are spent on maintaining the device. As described above, conventional methods require a lot of manpower, tools, money, and time to analyze data, and the reliability of the data is not high.

[Means to solve the problem]

The light spectrum analyzer of the present invention has a prism for illumination of light, a photodiode array for measuring the intensity of each wavelength, and integrates both. The analog output of each bit of the array is amplified by an amplifier, and the A/D
After conversion, it is processed by the CPU. Data is proofread, edited, filed, and displayed through processing by the CPU program.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. The prism 1 polarizes the measured light 2 for each wavelength. The polarized light enters a photodiode array 3 that is brought into close contact with the prism 1.

The analog output current of each bit of the array is amplified by an amplifier 4 and input to an A/D converter 5. Digital data is input to the CPU 6, and the data is corrected, processed, and stored. The processed data is output to the output device 7 and utilized in the form most suitable for use.

〔Effect of the invention〕

As explained above, the present invention has the advantage of being compact and lightweight by integrating the optical system and the sensor, and has excellent vibration resistance and aging resistance. Furthermore, since most of the errors included in the read data are random errors of 1/2 LSB during A/D conversion and systematic errors, the errors can be corrected with high precision through statistical techniques. In this way, by eliminating mechanical driving parts and having a system that directly converts polarized light into electricity, converts it into digital data, and processes it, it is possible to perform highly reliable and highly functional spectroscopic analysis. There is.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. l... Prism, 2... Light to be measured, 3... Photodiode array, 4... Amplifier, 5... A/D
Converter, 6...CUP, 7...Output device.

Claims (1)

[Claims] It is characterized by applying light separated by a prism to a photodiode array and converting it directly into electricity, and converting the analog output signal to a digital signal to obtain spectrum analysis data, incident angle correction data, and element sensitivity correction data. A light spectrum analyzer.