Broad-spectrum light source based on LED

Abstract

The invention relates to a broad-spectrum light source based on an LED. The light source comprises a light source shell, an LED constant-current driving circuit, an LED array, a gathering light path and an optical fiber coupler. The light source shell is connected with the LED constant-current driving circuit, the LED array, the gathering light path and the optical fiber coupler; the LED constant-current driving circuit is connected with the LED array and provides stable current driving for the LED array, and the LED constant-current driving circuit is located behind the LED array; the LED array is composed of multiple single-color LEDs and a white-light LED, the white-light LED is placed in the center of the LED array, and the single-color LEDs are symmetrically placed at an outer circle;the gathering light path is placed in the light source shell and placed in front of the LED array; the output end of the gathering light path is connected with the optical fiber coupler. The broad-spectrum light source is low in power consumption, wide in spectrum range, long in service life, simple in driving circuit and small in size.

Description

technical field [0001] The invention belongs to the field of wide-spectrum light sources, and is especially applied to spectral analysis and spectrometer light sources. Background technique [0002] With the continuous development of spectral technology, spectral analysis is widely used in biology, chemistry, water quality and other fields, and a stable and reliable light source is an indispensable component in the spectral acquisition system. The light sources used with spectrometers usually include tungsten lamps, deuterium lamps, xenon lamps, high-pressure mercury lamps, light-emitting diodes, etc. These light sources usually face various problems, such as short life, small spectral range, large volume, and complex drive circuits. The LED light source has high stability and a life span of tens of thousands of hours, but the bandwidth of the LED light source is narrow, and the wavelength bandwidth of a monochromatic LED is usually lower than 50nm, so the scope of applicati...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of existing spectrometer light source such as short life, small spectral range, large volume, and complex driving circuit, the present invention provides a wide-spectrum LED light source based on the combination of monochrome LED and white light LED through the optical path. Low power consumption, wide spectral range, long life, simple drive circuit, small size, etc.

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