Light emitting diode four-channel multiband light source

Abstract

The invention discloses a light emitting diode (LED) four-channel multiband light source which comprises four LED light source modules and a co-focus lens. Each light source module comprises an LED light source, a condenser and an optical filter; the included angle of the optical axes of the optical filter and the light source module is 72 degrees, the included angle of the optical axes of a second light source module and a first light source module is 36 degrees; the included angle of the optical axes of a third light source module and the second light source module is 36 degrees; the included angle of the optical axes of a fourth light source module and the third light source module is 36 degrees; the optical filters of the second light source module, the fourth light source module, thefirst light source module and the third light source module are arranged into four sides of a regular pentagon in turn; and the optical axis of the first light source module is superposed with the optical axis of the co-focus lens. The LED four-channel multiband light source has the advantages of freely combined multi-wave light, capability of realizing quick switching test, high luminous efficiency, long service life, high brightness and low power consumption, is especially suitable for the bio-medical field in rapid diagnosis of cell detection, photographic recording, pathological section, and is also suitable for the investigation and the inspection of physical evidence at the scene.

Description

technical field [0001] The invention relates to an LED four-channel multi-band light source, which belongs to the technical field of photoelectric lighting. Background technique [0002] Existing multi-band light sources usually consist of three parts: a light source component, a filter component and an output component. See figure 1 . The light source assembly includes light source 01 (tungsten halogen lamp or xenon lamp) and condenser lens 02. The filter assembly is a turntable 03 on which four groups of filters 0301, 0302, 0303 and 0304 are installed. The output assembly includes a focusable lens 04 and a light guide rod 05. The light emitted by the light source 01 passes through one of the four groups of filters on the turntable 03, and then exits through the focusable lens 04 and the light guide rod 05 of the output assembly. In this way, the device can emit illumination light of four wavelength bands. By changing the filters of different wavelength bands, the devi...

AI Technical Summary

Problems solved by technology

[0004] 1. The excitation light intensity of light source 01 (generally tungsten halogen lamp or xenon lamp) attenuates more after passing through the filter

[0005] 2. The light source 01 (usually halogen tungsten lamp or xenon lamp) has a short life span (1000h-3000h)

After being filtered by the filter, the ultraviolet light and short-wave visible light in the range of 400nm-550nm are weak, so the function of this light source to excite fluorescence is very limited

[0007] 4. Only a single channel can be used, and several bands cannot be mixed with light at the same time. It is necessary to make narrow-band filters for more bands for replacement, and the cost is high.

[0008] 5. It is not convenient enough to change the filter and adjust the lens focus during use, which is not conducive to rapid analysis

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