Uniform light-emitting optical system and warning lamp

Abstract

The invention discloses a uniform light-emitting optical system and a warning lamp. The optical system sequentially comprises an LED lamp strip, a first inner lens and a second inner lens in the light emitting direction. The LED lamp strip comprises a substrate and a plurality of LED light sources arranged on the LED substrate, and the LED light sources are arranged in the length direction of the LED substrate at equal intervals. The distance between the inner surface of the first inner lens and the center of the LED light source is 3-5 mm, light emitted by the LED light source is converged through the first inner lens to form a light beam, the reverse extension line of the light beam is converged at one point behind the LED light source, a virtual light source focus F is reconstructed, and the virtual focus F serves as the focus of the second inner lens. The base surfaces of the inner surface and the outer surface of the second inner lens are composed of free-form surfaces, and the second inner lens obtains a larger light source focal length through the virtual focus F reconstructed by the first inner lens. The light emitting regulation requirements of the warning lamp are met, the size is small, and light emitting is uniform.

Description

technical field [0001] The invention relates to an optical system, in particular to a uniform light emitting optical system and a warning light. Background technique [0002] Vehicle warning lights are used to remind surrounding pedestrians and vehicles to pay attention to road conditions, and require a wide light distribution angle and strong light intensity, and there is a demand for miniaturized warning lights in the market. Existing LED lights can achieve the above performance by being equipped with different lenses and reflectors, such as a miniaturized LED warning light disclosed in Chinese utility model CN205332081U. Stripes, so that the light output of the LED chip meets the requirements of the warning light. Its technical defect is: still need to be equipped with reflector, and its volume is bigger. In addition, there are ultra-thin warning lights, such as a kind of ultra-thin warning light whose notification number is CN207621935U, including a base, an LED chip i...

AI Technical Summary

Problems solved by technology

Its technical disadvantages are: it still needs to be equipped with a reflector, and its volume is relatively large

In addition, there are ultra-thin warning lights, such as a kind of ultra-thin warning light whose notification number is CN207621935U, including a base, an LED chip installed on the base, a backing plate installed between the base and the LED chip, and a cover for the LED chip. The lens and the cover plate used to fix the lens on the base; the exit surface of the lens is a plane, and the incident surface includes a strip-shaped first incident surface, a second incident surface surrounding the periphery of the first incident surface, and a surrounding On the third incident surface on the periphery of the second incident surface, the section of the first incident surface is arc-shaped, and the combination of the second incident surface and the third incident surface forms a zigzag section. Although the volume of this ultra-thin warning light is reduced, it is It has only one layer of lens, which cannot achieve uniform light output

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