RU1800292C - High-speed multichannel spectrometer - Google Patents

Abstract

SUMMARY OF THE INVENTION: the device comprises a polychromator, M photodetectors, an analog shift register, an amplifier, a control unit, a storage device.

Description

The invention relates to spectral instrumentation and can be used to study fast optical processes.

The purpose of the invention is to improve the accuracy of measuring instantaneous values of the spectrum intensity of the signal under study.

The drawing shows a diagram of a high-speed multi-channel device.

The device comprises a polychromator 1, m photodetectors 2 (for example, phototransistors), an analog shift register 3 (for example, a CCD register), an amplifier 4, a control unit 5, and a long-term memory unit 6. Each photodetector is connected to the corresponding input of the analog shift register 3, to the output of which the amplifier 4 and the long-term memory unit 6 are connected in series. The control unit 5 controls the operation of the analog shift register 3 and the long-term memory unit 6.

The device operates as follows.

Spectrum registration with a high-speed multichannel spectrometer is barely possible. At the first stage, the electrical signals coming from the photodetectors 2 are set. of the spectrum of the polychromator 1, located on the plane of the image, are fed to the inputs of the analog shift register 3. The control unit 5 starts working synchronously with the beginning of the process under study and after some time enters the photodetector 2 signal into the cells of the analog shift register 3, each recorded signal is stored in analog form in accordance with - the corresponding cells and is stored for a time determined by the properties of the cells of the analog shift register 3. At this, the first stage - analog storing in the register - end vaets.

At the second stage, the control unit 5 shifts all the signals stored in the analog shift register 37 so that they

ate

WITH

00

oh oh

N about

Yu

sequentially fed to the input of amplifier 4, and from the output of the amplifier fed to the input of unit 6 of long-term memory, where it is stored. The use of an analog shift register, made using integrated technology on a single chip, which has the identity of memory cells, for preliminary storing of photodetector signals ensures that the moments of storing the signal in register cells coincide with high accuracy.

A high-speed multichannel spectrometer is implemented on IP of widespread series. In particular: analog shift register on the 528 Series IC: 544 amplifier; a control unit and long-term memory on the 555 and 565 series ICs.

Compared with the prototype, the proposed high-speed multichannel spectrometer has increased accuracy when registering fast-flowing optical processes. High accuracy is achieved by eliminating the error.

0

associated with a mismatch in the timing of memorization of signals coming from different photodetectors.

A format and high-speed multi-channel spectrometer comprising optically coupled polychromator and photodetectors, a long-term memory unit, an amplifier, a control unit, characterized in that. in order to increase the accuracy of measuring the instantaneous values of the spectrum intensity of the optical signal, an analog shift register is introduced into it, and to 5 each photodetector an analog shift register input is connected, the output of which is connected to the amplifier input, and the amplifier output is connected to a long-term memory unit, the first output of the control unit is connected to an analog shift register, and the input of the shift control and the input of the long-term memory control are connected to the second output of the control unit.

0

tt

J