Combined lens composed of lens and reflecting mirror, and automobile lamp module for combined lens

Abstract

The invention relates to a combined lens composed of a lens and a reflecting mirror. The combined lens composed of the lens and the reflecting mirror at least comprises one lens and one reflecting mirror. From a reverse light path, parallel light is subjected to twice of refraction of an incident face and an exit face of the lens, and converges at one point after being subjected to once of reflecting of the reflecting mirror, and the point is the focal point of the combined lens; the distance between the lens and the reflecting mirror is smaller than the focal distance of the lens; the lens can be a convex lens or a concave lens; the reflecting mirror can be a convex mirror, a plane mirror or a concave mirror; and meanwhile, for the traditional lens, the position of the focal point is controlled through two optical faces including the incident face and the exit face, under the condition with the same focal length, the thickness of the common lens is relatively large, and in addition, the direction of optical axis is generally the center line of the lens. For the combined lens, the focal length of the combined lens is determined at least through the incident face and the exit face of the lens and the reflecting face of the reflecting mirror, so that the thickness of the lens can be reduced, and the position of the focal point and the direction of the optical axis also can be flexibly set.

Description

technical field [0001] The invention relates to a vehicle lamp module, specifically, a combined lens composed of a lens and a reflector and the vehicle lamp module. Background technique [0002] The lens used in the existing car light system is generally a plano-convex lens. The parallel light is refracted twice through the outer surface and the inner surface of the plano-convex lens and converges at one point, that is, the focal point, such as figure 1 shown. [0003] As shown in Figure 2 of the existing car light system, the light source 1 is set at the first focal point of the quasi-ellipsoid reflective surface of the reflector 2, and converges near the second focal point, and the second focal point of the quasi-ellipsoidal surface is set on the plano-convex lens 4 of focus. If it is a car lighting system that needs a cut-off line of light and shade, such as a low-beam lighting system, a light baffle 3 is provided at the focus of the plano-convex lens to form a light-da...

AI Technical Summary

Problems solved by technology

[0005] The defect of the above lamp system is that the first focal point, the second focal point and the lens of the quasi-ellipsoid reflective surface are arranged in a straight line, resulting in long front and rear dimensions, and the spatial structure of the lamp is limited

[0006] In addition, the plano-convex lens is thicker, which is not conducive to product molding, especially more and more lenses are molded by plastic injection molding. The thicker the lens, the longer the molding time and cooling time, and the lens is also easily deformed by cooling, resulting in unstable focal length; However, if the thickness of the lens is reduced, the focal length will become longer, which will also lead to the lengthening of the front and rear length of the lamp, which will limit the space of the lamp

Images