CN103790117A - Road wide-angle lens - Google Patents

Abstract

The invention relates to a road wide-angle lens and belongs to traffic sign warning equipment. The road wide-angle lens comprises a lens plate A, a lens frame B for fixing the lens plate and a support C for supporting the lens plate and the lens frame. The road wide-angle lenses are mounted on two sides of a road, a driver can observe the road conditions of a sight blind area caused by road bending or protrusion through the concave lens imaging of each lens plate A. The road wide-angle lens is simple in structure and convenient to mount and manufacture, and traffic accidents caused by road conditions can be reduced effectively.

Description

Highway wide-angle lens

Technical field

The present invention relates to a kind of wide-angle lens, belong to traffic sign warning equipment class, refer in particular to and be applicable to that road turns round or high spot makees the wide-angle lens that security warning is used.

Background technology

Wideangle reflection mirror is widely used in turning round of road for many years as a kind of road sign warning equipment always, the use as safety indication is located on T-shaped road etc., as shown in Figure 1, the wideangle reflection mirror of D point position can allow A car find early the existence of opposite B car, avoids accident.But less or protruding in the situation that, wideangle reflection mirror cannot be eliminated the blind area on Driver Vision, as shown in Fig. 2 Fig. 3 at section degree of crook.In Fig. 2, bend of road is little, and A car is because the stopping of front C car and massif, A car driver cannot observe the existence of B car, because road flexibility is less, this cannot allow vehicle A see the opposite B that sends a car at D point position installation wideangle reflection mirror.In Fig. 2, vehicle A, as now overtaken other vehicles to A ' position from outer course, very easily bumps against with B car.In Fig. 3, A car cannot be observed opposite because of road projection and sail the B car coming, and easy and B car bumps against.

Summary of the invention

Object of the present invention, is intended to a kind of novel road wide-angle lens, eliminates the vision dead zone of driver in little detour and male-type slope road situation.

As shown in Figure 6, this highway wide-angle lens is by lens board A, and picture frame B and support C form, and lens board A is embedded in picture frame B, and picture frame B is fixed on support C.As shown in Figure 7, Fig. 7 a is lens board schematic diagram to described lens board, the A-A face sectional view that Fig. 7 b is lens board.The parabola on described lens board A surface also can be made and be equivalent to paraboloidal plane according to Fresnel Lenses principle, as shown in Figure 7 c.

The installation site of this highway wide-angle lens as shown in Figure 4 and Figure 5.In Fig. 4, by being installed on the highway wide-angle lens of D point position, the driver of A car can observe the situation of B car in the sight line blind area that is subject to C car or massif to stop formation.In Fig. 5, A car driver, by the highway wide-angle lens of D point position, can observe the B car of convex road opposite side.By concave mirror image-forming principle, can eliminate driver's vision dead zone, avoid collision accident to occur.

Claims (3)

1.Yi Zhong highway wide-angle lens, by lens board, picture frame, support composition, is characterised in that its lens board is concave lens or the flat board that is equivalent to concave lens according to Fresnel Lenses principle.

2. a kind of highway wide-angle lens according to claim 1, is characterised in that its lens board minute surface is parabola or is equivalent to paraboloidal plane according to Fresnel Lenses principle.

3. according to a kind of highway wide-angle lens described in claim 1,2, be characterised in that its lens board cross section is " A " type or the rectangle that is equivalent to " A type " according to Fresnel Lenses principle.

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