Fast multi-channel spectrometer for LED full spectrum detection

Abstract

The invention provides a fast multi-channel spectrometer for LED full spectrum detection. The fast multi-channel spectrometer comprises an optical system, a detector, a signal processing circuit, a single chip microcomputer main control system and a control signal generating circuit. The optical system uniformly irradiates light emitted by an LED to the detector, the structure of the optical system is a crossed Czerny-Turner system; the detector is an MOS linear array image detector S3901-256LVF, which is composed of a self-scanned photodiode array provided with a linearly variable filters; the signal processing circuit is used for driving the detector and amplifying a signal output by the detector; and the single chip microcomputer main control system controls the control signal generating circuit to generate two paths of input signals required by the signal processing circuit including a main clock signal and a main initiating signal. The fast multi-channel spectrometer can realize the diversification of test parameters, can detect a plurality of signals in parallel at the same time, has very short measurement time, is high in signal-to-noise ratio, has low requirement on stability of a light source, and can obtain spatial resolution and time-resolved spectrum without adopting mechanical scanning.

Description

technical field [0001] The invention belongs to the technical field of testing instruments, and in particular relates to a fast multi-channel spectrometer for full-spectrum detection of LEDs. Background technique [0002] Due to the rapid development of the LED industry and the intensifying competition, the quality of LEDs has received unprecedented attention, especially in large-screen displays, LED lighting sources, communications and other occasions that require high accuracy of color and wavelength. The importance of parameter quality control is becoming more and more prominent. Therefore, it is becoming more and more important to accurately and quantitatively measure various characteristic parameters of LEDs and their application products. A light-emitting diode is both a semiconductor diode and a light source. Therefore, we need to measure its electrical parameters as a semiconductor device. The electrical parameters are the most basic criteria to measure whether a lig...

AI Technical Summary

Problems solved by technology

The mechanical scanning spectrometer has a relatively long history. Due to the optical structure design, detector response and other reasons, the measurement takes a long time, especially the mechanical scanning double monochromator spectrometer, which has high precision but a long measurement time, which is only suitable for experiments. laboratory or scientific research institution

With the development of detector technology and the maturity and application of new detection devices, multi-channel spectrometers have appeared, and the test speed has been greatly improved; but the accuracy of such spectrometers is relatively low

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