CN2543777Y

CN2543777Y - All carve surface large view field rear-view mirror

Info

Publication number: CN2543777Y
Application number: CN 02238147
Authority: CN
Inventors: 李鸿卿; 索沂生
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-18
Filing date: 2002-06-18
Publication date: 2003-04-09
Anticipated expiration: 2012-06-18

Abstract

The utility model relates to an all carve surface large view field rear-view mirror relating to a vehicle optical observation device, which is characterized in that: the mirror surface is formed by the regular ball surface or on part of carve surface of the ellipsoid. The mirror surface is formed by the regular ball surface or on part of carve surface of the ellipsoid, so the design is very convenient, and the carve surface is the regular changing, namely the radius of curvature for the carve surface is in continuous changing, so the distorting of the image is regular, thereby having no big influence for the driver to exactly judge the distance of the object. In addition, when the vehicle type changes or the size of the mirror changes, the utility model can conveniently choose different part of the regular carve surface, which can not bring the trouble about the design.

Description

The big visual field of a kind of regular complementary surface back mirror

Technical field

The utility model relates to a kind of vehicle optical finder, particularly a kind of external back mirror that is made of complementary surface.

Background technology

Existing vehicle mirrors mainly adopts two kinds of plane mirror and curved mirrors.Plane mirror has tunnel vision, but image is indeformable, and is undistorted.Curved mirror has enlarged the visual field, can eliminate or the part dead zone-eliminating, but inevitably can cause the distortion and the distortion of image.So long as no matter curved mirror is many curved surfaces or single curved surface, all inevitably cause metamorphopsic distortion, this is that principle by geometric optics is determined.But aspect the shaping of minute surface, can broaden one's vision, under the prerequisite of elimination or part dead zone-eliminating, reasonably organize curved surface, reduce the distortion of image as far as possible, and take into account the requirement of design and processes aspect satisfied.

Existing complementary surface back mirror, the moulding rule of its curved surface is more complicated all, and it is regular that curved surface changes shortage, causes the difficulty of design and processing; Lack regularity because curved surface changes, thereby cause the distortion shortage of image regular, this further causes difficulty can for the distance of driver's right judgement object.In addition, for different vehicles, (for example size of minute surface, crooked angle etc.) cause bigger trouble also can for design and processing when back mirror being had different the requirement.

The utility model content

The purpose of this utility model is the design processing difficulties that exists at complementary surface mirror in the prior art, the distortion of image lacks regular defective, the big visual field of a kind of regular complementary surface back mirror is provided, this back mirror can not only be eliminated or part is eliminated auto body both sides and the preceding blind area of headstock, and has design processing simply, the advantage that deformation of image is more regular.

The purpose of this utility model is achieved by the following technical solution: the big visual field of a kind of regular complementary surface back mirror is characterized in that its minute surface is made of the ball face of rule or a part of curved surface of ellipsoid surface.

The utility model compared with prior art, have the following advantages and beneficial effect: because minute surface adopts the sphere of rule or certain part of ellipsoid surface to constitute, therefore not only design very convenient, and its curved surface is well-regulated variation, the radius of curvature that is curved surface changes continuously, therefore the distortion of its image also is clocklike, and this distance to driver's right judgement object can not cause great influence; Change or the size of minute surface when changing when vehicle in addition, the different parts of selection rule curved surface can not bring the trouble in the design easily.

Description of drawings

Fig. 1 represents the situation that minute surface of the present utility model is chosen on ellipsoid surface, promptly minute surface is to choose at the major axis of ellipsoid and the position of minor axis symmetry, is the minute surface design of symmetry.

Fig. 2 has expressed the another kind of situation that the utility model is chosen on ellipsoid surface, this minute surface is an asymmetric design.

The specific embodiment

The big visual field of complementary surface provided by the utility model back mirror can be according to the needs of different vehicle, and the ball face of selection rule or certain part of ellipsoid surface are as the minute surface of back mirror.The advantage of sphere is that its radius of curvature equates everywhere, as long as change the radius of curvature that the radius of ball just can be adjusted the minute surface each point, in the part over against sphere, anamorphose is less.The advantage of ellipsoid surface is the radius of curvature difference of its each point, needs only the different length of three axles suitably choosing ellipsoid or choose different positions on ellipsoid surface, just can adjust the radius of curvature of each point, makes it to satisfy the specific requirement of back mirror.Because sphere and ellipsoid surface all are ruled surfaces, this has brought very big convenience for the design and the processing of back mirror.For example can adopt the big and less design of lateral curvature radius of centre portion radius of curvature, perhaps conversely, adopt less and the design that the lateral curvature radius is bigger of centre portion radius of curvature.Before a kind of main vision area distortion that focuses in the middle of guaranteeing that designs consideration less, then a kind of design is to make overall deformation rate more even.Simultaneously, the total angle of bend (laterally reaching vertically) of minute surface also can design according to concrete requirement.

Fig. 1 shows the situation of choosing the minute surface part on ellipsoid surface, and this is illustrated as the minute surface design of symmetry.The situation of employing sphere similarly.Notice that when adopting sphere if minute surface is a rectangle, then minute surface is always symmetrical.

Fig. 2 shows the another kind of situation of choosing minute surface on ellipsoid surface, and this minute surface is an asymmetric design, and the situation representative type shown in the figure can be used for the left mirror of dolly mirror, and the right mirror of dolly mirror can be chosen with left mirror symmetry.

Claims

1. the big visual field of a regular complementary surface back mirror is characterized in that its minute surface is made of the ball face of rule or a part of curved surface of ellipsoid surface.