Laser car fog lamp optical system formed by combining diffraction optical element and laser device

Abstract

The invention discloses a laser car fog lamp optical system formed by combining a diffraction optical element and a laser device. The laser car fog lamp optical system comprises a laser illuminating light source and the diffraction optical element, wherein the laser illuminating light source is a divergency light source or a collimating parallel light source, and the diffraction optical element is designed according to parameters of the laser illuminating light source and used for achieving optical field distribution required by the optical system. The diffraction optical element has the characteristics of being small in size, easy to mount and low in cost and can greatly reduce the size of the optical system and reduce the cost of an optical product. Meanwhile, according to the diffraction optical element, the optical indicatrix allowance is large, the influence of fine dust and dirt of a light pass area on an abnormal-shaped optical field is quite small, the requirement for the application environments is low, the element can adapt to various complex application environments, an adjusting system with high light utilization efficiency of the optical field, low cost, simple optical structure design, small size and high-accuracy divergence angle is completely achieved, and the functions and applicability of the optical system are improved.

Description

technical field [0001] The invention belongs to the field of optics, and in particular relates to a laser automobile fog light optical system using a combination of diffractive optical elements and lasers. Background technique [0002] In modern technology, with the application and development of the automobile market, auto parts products and corresponding optoelectronic equipment and systems, the application of optoelectronic products in the auto parts application market is becoming more and more extensive, and the requirements for the technical indicators of optoelectronic products are also getting higher and higher. Among them According to specific application requirements, the application market of laser fog lamp lighting field with special pattern is developing rapidly, such as fog lamp products with long-distance oblique irradiation, special pattern car fog lamp products, and fog lamp products with large angle outside the bottom of the car, etc. The development of prod...

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Problems solved by technology

The traditional design method is to modulate the incident light field by means of refraction, occlusion, and imaging. The design method has complex optical elements, a large number, very low light utilization efficiency, and single function, which cannot realize complex lighting light fields. For example, for new application fields such as automobile fog lamps with large inclination angles, asymmetric correction of light intensity distribution, and long-distance fog lamps over 100 meters, traditional design methods cannot be realized.

At the same time, the traditional lighting light field design method has large optical devices, high cost, and high requirements for the application environment. Fine dust on the surface of the optical device will cause serious defects in the special-shaped light field. The above factors have caused many problems for the use of this product. Unfavorable factors seriously limit the market application of the product

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