JPH1178698A - Wide-angle mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide-angle mirror including a doughnut face mirror as an objective mirror and a plane mirror as a watching mirror are located in proximity to each other so that a wide angle of view is obtained, whereby it is possible to certainly perceive from the driver's seat the situation of an acutely crossing road lying on the rear left/right side of the passenger seat at an acute crossing road which has been difficult according to the conventional technique and to be arranged in the car so as to ensure safe use. SOLUTION: A wide-angle mirror of a car is equipped with a mirror box 1 which is arranged in the front-and-rear direction on the inner surface of a window glass G on the passenger seat of the car and where an objective window hole 2 is opened in the front part of the extra-car side wall directed to outside the car and a watching window hole 3 is opened in the rear part of the intra-car side wall directed to inside the car, an objective mirror (mirror body) 10 which has a doughnut mirror face formed by continuously curving with the same radius of curvature in a concave on a horizontal direction section and a convex on a vertical direction section and which is arranged ahead of an objective window hole 2 in the mirror box 1 directed aslant backward of outside the car, and a watching mirror 11 which is arranged behind the watching window hole 3 in the mirror box 1 so that the projected mirror image by the objective mirror 10 is reflected to the intra-car side as directed aslant forward of inside the car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a wide-angle side mirror capable of providing a large rear-side field of view so that a driver's seat can surely recognize a rear view of a side portion of a truck, particularly a road surface condition on an acute intersection at an acute intersection. The present invention relates to a wide-angle mirror that can constitute a device.

[0002]

2. Description of the Related Art When driving a car, a relatively large view is provided by the driver directly looking at the rear side of the driver's seat and through a side mirror composed of a convex mirror disposed in front of the vehicle body in the driver's seat. As a result, the driver can confirm the surrounding conditions on the driver's seat side, and traffic safety is normally secured. However, on the opposite side of the driver's seat, the so-called passenger's seat, when the assistant is in the vehicle, the driver can drive the driver alone, even if the assistant can directly check the rear. In such a case, the confirmation of the rear view on the passenger seat side must be performed by the side mirror device particularly in the case of a truck.

[0003] For this reason, various types of side mirror devices for the passenger side have conventionally been provided, all of which are mainly composed of a convex mirror. (See reference numeral 20 in FIG. 7). However, according to this, only a certain angle range from the side surface along the vehicle body, that is, a view within an acute range (see θ2 in FIG. 7) is ensured. The situation of the sharp intersection road, which intersects from behind at an acute angle at the intersection, was invisible.

In order to solve such a problem, for example,
There is a horizontal mirror according to Japanese Patent Application Laid-Open No. 4-139439. As shown in FIG. 10, a convex mirror 21 is attached to the rear side of the passenger seat side of the side of the automobile C at an angle to the traveling direction, and a projection mirror image projected by the convex mirror 21 is also attached to the front surface of the passenger seat side. The light is reflected by the concave reflecting mirror 22 to secure a field of view behind the automobile C on the passenger seat side.

[0005]

However, the horizontal mirror shown in FIG. 10 requires a convex mirror 21 to increase the rear side field of view.
The width of the vehicle itself must be increased, so that it protrudes greatly to the side of the vehicle C, which is obstructive and dangerous, and increases the air resistance during traveling, which in turn increases the fuel cost. .

On the other hand, when a concave mirror is used, its reflection mirror image is unclear and blurred, and when it has a concave spherical shape, the mirror image is upside down, and when viewed from the driver's seat, the actual situation is displayed. It is well-known that it cannot be used at all because it is different from the one described above.

In view of this situation, the present inventor has proposed a donut mirror which is a concave surface in the horizontal x-axis direction and a convex surface in the vertical y-axis direction, ie, a mirror surface forming a part of a so-called donut surface. It has been found that a small, bright, clear, and large field of view can be obtained by using, and the present invention has been accomplished. That is, in the present invention, even if the donut surface mirror is used as an objective mirror and the plane mirror is arranged as a peeping mirror close to each other, the field of view is narrow and does not become small. A wide-angle side mirror device that can be safely used without being located outside the vehicle, allowing the driver to securely view the condition of the sharp intersection road that is the rear side of the vehicle, without disposing it outside the vehicle. Has been successfully obtained.

[0008]

According to the present invention, there is provided a mirror body (1) having a mirror surface.
In 0), a cross section along one of a vertical line and a horizontal line, which are substantially orthogonal to each other, is formed into a concave surface depressed in a concave shape, and a cross section along the other is formed into a convex surface bulging into a convex shape to be continuously formed. The mirror has a donut mirror surface or an hourglass mirror surface, and the concave surface and the convex surface have substantially the same curvature. And the mirror body (10)
May be arranged such that the concave surface is along a vertical line and the convex surface is along a horizontal line, or conversely, the concave surface is arranged as a horizontal line and the convex surface is along a vertical line. More specifically, the object window 2 is disposed along the front-rear direction on the side portion of the vehicle C, and the object window 2 is provided on the front side of the vehicle exterior wall facing the outside of the vehicle, and the viewing window 3 is provided on the rear side of the vehicle interior side wall facing the vehicle. And a donut which is continuously formed by curving a mirror box 1 having an opening, a concave surface concaved in a horizontal section, and a convex surface bulging in a vertical section. The objective mirror 10 has a mirror surface or a drum-shaped mirror surface and is disposed obliquely rearward outside the vehicle and disposed at the objective window 2 in the mirror box 1, and is directed obliquely forward inside the vehicle and is provided with the objective mirror 10. And a viewing mirror 11 disposed at the viewing window 3 in the mirror box 1 so as to reflect the projection mirror image toward the inside of the vehicle. The curvature of the concave and convex surfaces of the donut mirror surface of the objective mirror 10 is substantially the same, the viewing mirror 11 is a plane mirror, the objective mirror 10 faces the objective window 2 and the viewing mirror 11 faces the viewing window 3. Instead, they are located behind and fixed respectively. And mirror box 1 again
Are disposed on the inner surface of the window glass G on the passenger seat side of the automobile C, or are connected and fixed to the vehicle body support B around the window glass G on the passenger seat side of the automobile C.

[0009]

In the wide-angle mirror according to the present invention, the projected mirror image obtained by the mirror body (10) is an erect normal image in which the right and left are not inverted, and the mirror body (10) itself is directed downward as it is. For example, the reflection of character information or the like on the road surface can be read as it is without being inverted in any of the left, right, up and down directions. That is, a continuously formed donut or drum-shaped mirror surface that is concave on the horizontal line and convex and curved on the vertical line forms an erect mirror image, and is a convex surface on the horizontal line in a state where it is rotated by 90 degrees. A continuously formed mirror surface that is concave and curved in a vertical line forms an inverted mirror image that is upside down. In addition, the objective mirror 10 of the automobile C, which is directed obliquely rearward of the outside of the vehicle, has a curved donut surface or a drum-shaped mirror surface having a concave surface in a horizontal cross section and a convex surface in a vertical cross section. Is formed as a projection mirror image of an erect erect image while maintaining the landscape obliquely behind at a wide viewing angle. When the projection mirror image obtained by the objective mirror 10 is reflected inside the vehicle by the viewing mirror 11, the reflection mirror image seen by the driver has a wide field of view even if the image is inverted left and right. Not only the driver, but also, for example, the situation of the sharp intersection road, which is the rear side of the passenger seat side at the sharp intersection, is surely visually recognized from the driver's seat. The objective mirror 10 is directed obliquely rearward, and the viewing mirror 11 is directed obliquely forward and faces each other.
By being arranged in a close proximity to the inside, the whole is made compact, and by fixing it to the inner surface of the window glass G, a sufficiently wide viewing angle is formed even when it is arranged inside the vehicle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the accompanying drawings. In the case of a left-hand drive vehicle, it is sufficient to simply reverse the left-right or up-down direction. Those skilled in the art can fully understand the description, and thus are omitted. That is, reference numeral 1 shown in the figure denotes a mirror box fixedly disposed on the inner surface of the window glass G on the passenger side of a truck, for example. The mirror box 1 has a substantially rectangular parallelepiped shape elongated in the front-rear direction of the vehicle C used. The objective window 2 is opened on the front side of the vehicle outer side wall facing the outside of the vehicle, and the viewing window 3 is opened on the rear side of the vehicle inner side wall facing the inside of the vehicle. Objective window 2
The object view is oblique because not only the outer side surface of the vehicle but also the curved upper and lower portions of an objective mirror 10 which is a mirror body, which will be described later, and which is disposed in association with the objective window 2 as shown in FIG. Considering that the casing 1
The upper and lower windows 4 connected to the object window 2 are also opened on the upper and lower side walls of the object.

The outside wall of the mirror box 1 is slightly upwardly inclined, and when the wide-angle side mirror device is disposed inside the window glass G, the inside of the downwardly inclined passenger side window glass G is disposed. Care has been taken to ensure that the vehicle outer wall is in contact with the side surface and that the entire vehicle is stably maintained in a substantially horizontal state.

The mirror box 1 itself is fixedly mounted on the inner surface of the window glass G by supporting and fixing means 5.
The supporting and fixing means 5 shown in FIG. 1 is rigid and stretchable to a hook member 8 having an upper mounting piece 6 attached to the upper end of the front and rear side walls of the casing 1 and a lower mounting piece 7 attached to the lower end fixed to the side of the window glass G. And is fixed and fixed via the attachment cord 9 or the like. Of course, the supporting and fixing means 5 is not limited to the illustrated example, and may be made of, for example, a suction cup, a hook-and-loop fastener, an adhesive, or the like. In short, the scene outside the vehicle is transferred from the objective window 2 to the objective mirror 10 via the window glass G. As long as the mirror box 1 is arranged on the inner surface of the window glass G, it is sufficient.

Further, as shown in FIG. 9, the vehicle C can be connected to and fixed to a vehicle body support B around a window glass G on the passenger seat side of the vehicle C. For example, the vehicle C is fixed to the vehicle body support B by screws or the like. The mirror box 1 is supported and fixed to the L-shaped mounting arm 15. As described above, the mirror box 1 itself is not directly supported on the window glass G, but is supported separately from the window glass G, so that the window glass G can be freely opened and closed. Furthermore, by providing the hinge 16 at an appropriate position such as a bent portion of the mounting arm 15, the entire side mirror device of the present invention is retracted to the side, so that it does not become an obstacle when the window is opened. You can also do so.

In the mirror box 1, an opening is formed at the front of the mirror box 1 itself, and a mirror having a donut mirror surface which is positioned forward while facing the object window 2 and is directed obliquely rearward outside the vehicle. Objective mirror 10 as main body
A viewing mirror 11 having a flat mirror surface which is positioned rearward and is directed obliquely forward in the vehicle and faces a projection mirror image of the objective mirror 10 toward the inside of the vehicle, facing the viewing window 3 also formed in the rear part. Is arranged. In the drawing, reference numeral 12 denotes a substantially L-shaped objective mirror fixing piece having a cross section for fixing the objective mirror 10 to the inner surfaces of the upper and lower side walls of the mirror box 1, and similarly, 13 denotes the upper and lower side walls of the mirror box 1. This is a viewing mirror fixing piece having a substantially L-shaped cross section for fixing to an inner surface.

When the objective mirror 10 is fixedly arranged on the inner surface of the window glass G on the passenger seat side, the cross section along the horizontal direction (x-axis direction) has a concave surface depressed in a concave shape (see FIG. 5) and the vertical direction. In a section along the (y-axis direction), a mirror surface a continuously formed by being curved into a convex surface bulging into a convex portion (see FIG. 4).
It has. That is, as shown in FIG. 6, the donut-shaped object has a so-called donut surface, which is a part of the inner side surface forming the inner hollow portion, or a drum-shaped surface (not shown). The curvature along the horizontal direction and the curvature along the vertical direction are almost the same. Therefore, the radius r1 of the internal cavity portion in the donut-shaped object and the radius r2 of the cross-sectional circle in the ring-shaped portion forming the donut are: It is assumed that r1 = r2. When the relationship of r1 = r2 is satisfied and the ring portion of the donut-shaped object is imagined to be hollow, the inner side surface and the outer side surface of a part of the inner side wall portion side on the virtual side wall are The mirror surfaces formed by are approximately superimposed by a rotation of 90 degrees. Incidentally, it is desirable that the curvature in both the horizontal direction and the vertical direction on this donut surface is substantially a perfect circle,
By doing so, a clear projection mirror image without distortion in any direction can be obtained. When r1 ≠ r2, the projection mirror image obtained by the objective mirror 10 is distorted and blurred, and is not practical.

When the projection mirror image obtained by the objective mirror 10 on the donut surface is directly viewed, it is an upright non-reversed image and is directed obliquely outward and rearward on the side of the automobile C. Thus, the projection mirror image obtained by the objective mirror 10 is exactly the same as the landscape obliquely outward and rearward on the side of the automobile C as seen directly with the naked eye. In addition, when the objective mirror 10 is arranged alone so that the road surface is reflected downward as it is, when the projection mirror image is directly viewed, various numbers such as a speed limit display and a regulation display described on the road surface, for example, Character information and the like can be read as they are without being inverted in any of the left, right, up and down directions. That is, the mirror surface of a continuously formed donut or drum-shaped surface which is concave in the horizontal direction and convex and curved in the vertical direction, when viewed directly in relation to this, the right and left by a normal plane mirror An erect mirror image different from that of the inverted mirror image which is reversed is obtained. When the mirror is rotated 90 degrees, that is, it is convex in the horizontal direction and concave and curved in the vertical direction, the continuously formed mirror surface is upside down when viewed directly. An inverted mirror image is obtained.

On the other hand, the viewing mirror 11 is a plane mirror formed on a general flat surface, reflects a projection mirror image obtained by the objective mirror 10, and allows the driver in the driver's seat to view the reflection mirror image. It is like that. In view of the fact that the wide-angle side mirror device is arranged on the inner side of the window glass G on the side of the driver's seat which is almost lateral to the driver as shown in the figure, the viewing mirror 11 is located on the vehicle interior with respect to the front of the mirror box 1. The mirror is set in the mirror box 1 at an inclination angle of approximately 45 degrees. Corresponding to this, the objective mirror 10 is arranged in the mirror box 1 at an inclination angle of approximately 45 degrees on the vehicle outside with respect to the rear of the mirror box 1. When the relative positional relationship between the driver and the wide-angle side mirror device is different, the objective mirror 10 and the sight mirror 11 can be used.
Of course are changed correspondingly.

The reflecting mirror image obtained by the viewing mirror 11 is a mirror image of the erect erect image obtained by the objective mirror 10 which is reversed in the left and right directions. Therefore, as shown in FIG. is there. Further, the reflecting mirror image has a focal length and the like set so that the driver can clearly see the position in the driver's seat at the position where the driver looks through, that is, the position of the eyes. In addition, although this viewing mirror 11 is a plane mirror in the drawing, it can be a convex mirror or a concave mirror having a gentle slight curvature.
In short, it is sufficient that the projection mirror image by the objective mirror 10 is reflected to the driver side so that the driver can see the projection mirror image of the objective mirror 10.

Next, an example of the use of the wide-angle side mirror device will be described. As shown in FIG. 7, for example, the wide-angle side mirror device is fixed to the inside surface of a window glass G on the passenger side, which is the side of the driver, and is disposed in the vehicle. As shown in FIG. 1, the attachment string 9 inserted into each of the upper attachment piece 6 and the lower attachment piece 7 is engaged with the hook member 8 attached to the surface of the window glass G, so that the object window 2 is located outside the vehicle. The mirror box 1 is fixed so that the wall side faces the inner surface of the window glass G. By doing so, the oblique rear side landscape of the passenger seat side of the automobile C is projected from the objective window 2 to the objective mirror 10, and the projected mirror image is reflected by the viewing mirror 11, and is passed through the viewing window 3 to the driver. It can be seen as a mirror image.

The field of view obtained by the wide-angle side mirror device has a viewing angle θ1 as shown in FIG.
The vehicle has a wide range from a position slightly opened laterally to the vehicle body to a position almost laterally on the left and right sides. On the other hand, the field of view obtained by the conventional side mirror device 20 using a convex mirror has a viewing angle θ2 which is an acute angle range from a position substantially along the side of the vehicle body of the automobile C to an oblique rear position. Therefore, in the conventional side mirror device 20, the wide angle side mirror device cannot be seen at all as a blind spot α. For example, the situation of an acute intersection road that intersects a traveling road at an acute angle from the rear side of the passenger seat side can be seen. Can be.

Here, as shown in FIGS. 8A and 8B, a convex mirror 24 for object and a plane mirror 25 for peeping are arranged in one mirror box 23 fixed to the side of the car C. The mirrors 23 are arranged in a diagonally opposed manner, and the window 2 for the object is provided on the outer side wall surface of the mirror box 23.
6 is compared with a box-type side mirror in which each of the windows 27 for peeping is formed on the side wall on the inner side of the vehicle body. The arrangement of the convex mirror 24 and the plane mirror 25 may be such that the convex mirror 24 is arranged at the front part in a state of being inclined rearward as shown in FIG.
As shown in (B), the convex mirror 24 is arranged on the rear side in a state of being obliquely directed to the front side.

However, in the case of the box type side mirror shown in FIGS. 8A and 8B, the convex mirror 24 and the plane mirror 25 are close to each other even if two opposed mirrors are arranged similarly to the wide-angle side mirror device. Even if the openings 26 and 27 for the object or the peeping are formed large, the viewing angle range is not increased due to the limitation of the opening itself, and the rear and side views cannot be sufficiently secured. That is, a wide field of view as in the present invention cannot be obtained.

[0023]

The present invention is configured as described above.
For this reason, the donut surface mirror is replaced with the objective mirror 1 which is a mirror body.
Even if the plane mirror is disposed close to each other in the mirror box 1 as the peeping mirror 11, the field of view is narrow and does not become small. In particular, the rear side of the passenger's seat side at an acute angle intersection which has been difficult in the past. The driver can clearly see the situation of the sharp intersection road from the driver's seat. Moreover, since it is possible to arrange the vehicle inside the vehicle C without disposing the vehicle C outside the vehicle, there is no need to protrude greatly outside the vehicle body. There is no, and it can be used safely.

That is, according to the present invention, in the mirror body (10) having a mirror surface, a cross section along one of a vertical line and a horizontal line that is substantially orthogonal to each other is formed as a concave surface concaved in a concave shape, and a cross section along the other is formed as a concave surface. This is because it has a donut mirror surface or an hourglass mirror surface that is continuously formed by bending each of the convex surfaces bulging into a convex shape, and the concave surface and the convex surface each have substantially the same curvature. The obtained projected mirror image is an erect image, and, for example, the reflection of character information and the like makes it possible to read it as it is.

In an arrangement in which the mirror surface of the mirror body (10) is concave in the direction along the horizontal line, the projected image on the mirror surface forms an upright mirror image which is the same as when the object is directly viewed. Thus, it is possible to see exactly the same field of view as directly viewing the object without going through a mirror surface. Conversely, in an arrangement in which the horizontal line is rotated 90 degrees and the horizontal line is convex and the vertical line is concave, it is possible to obtain an inverted mirror image that is upside down when the mirror surface is directly viewed, For example, if the road surface is reflected and the projected mirror image is directly viewed, various numbers and character information such as a speed limit display and a regulation display described on the road surface are reversed in any of the left, right, up, and down directions. This makes it possible to read the data without any modification.

Further, the objective window 2 is disposed on the front side of the vehicle outer wall which is arranged, for example, along the front-rear direction of the side of the automobile C so that the mirror body (10) is used as an objective mirror. Mirror boxes 1 each having an opening 3 at the rear side of the inner side wall facing the vehicle;
It has a donut mirror surface that is continuously formed by bending a concave surface in a cross section along the horizontal direction and a convex surface in a cross section along the vertical direction, and is disposed at the objective window 2 in the mirror box 1 obliquely rearward outside the vehicle. A wide-angle side mirror device including an objective mirror 10 and a viewing mirror 11 disposed at a viewing window 3 in a mirror box 1 so that a projection mirror image by the objective mirror 10 is reflected toward the inside of the vehicle toward an oblique front in the vehicle. It can be configured.

That is, the objective mirror 10 disposed in the mirror box 1 in the wide-angle side mirror device has a curved donut mirror surface having a concave surface in a horizontal cross section and a convex surface in a vertical cross section. As a result, since the vehicle C is directed obliquely rearward outside the vehicle, the scenery obliquely rearward outside the vehicle C forms a clear and clear upright projection image with a wide range of viewing angles. .

Since the projected mirror image is reflected to the inside of the vehicle by the viewing mirror 11 and can be seen through the viewing window 3, the driver can view the outside of the vehicle on the front passenger seat side with a wide field of view even if the projected mirror image is inverted right and left. Can be confirmed obliquely behind. Therefore, it is possible to see not only the landscape on the side of the car C, that is, the landscape on the passenger seat side, but also the landscape on the diagonal rear side. For example, when the traveling road intersects another road at an acute angle. The driver can easily see the situation of the sharp intersection road, which is the rear side of the passenger seat at the sharp intersection, from the driver's seat, and can grasp the behavior of other passing vehicles, pedestrians, etc. on the sharp intersection, and safely. It can pass through sharp intersections.

In the mirror box 1, the objective mirror 10 is directed obliquely rearward, and the viewing mirror 11 is directed obliquely forward so that they can be arranged in close proximity to each other. Even if it is fixed on the inner surface of the window glass G, it does not get in the way, and even if it is placed inside the car, it can obtain a sufficiently wide viewing angle, and it is safe because there is no need to arrange extra protrusions outside the car. is there.

Although not shown, the wide-angle side mirror device can be used as a curved mirror device. An example of the use as the curved mirror device at this time is, for example, when the vehicle goes out of a garage onto a road or the like. Is placed on the side of the exit. That is, an objective mirror 10 of a donut-shaped mirror that is directed obliquely forward of the garage is provided at the rear part of the mirror box 1 fixed to the side of the exit of the garage, and an objective mirror 10 is provided at the front part of the mirror box 1. The viewing mirrors 11 of the plane mirrors facing each other in the garage are arranged facing each other. By doing so, when going out of the garage, the situation at the side of the exit of the garage can be visually recognized, and the vehicle can safely enter the road or the like.

Also, in the present invention, a donut surface or a drum-shaped surface which is continuously curved and formed in a convex shape in one direction and a concave shape in the other direction orthogonal thereto is a mirror surface, and this is used as a mirror surface. The gist is to make the blind spot range, which cannot be directly seen normally by reflecting the projected mirror image obtained by the mirror surface, within the visual field. Therefore, design changes, structural modifications, and the like that can be made by those skilled in the art within the scope of the present invention are naturally included in the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a use state according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view showing a viewing angle.

FIG. 3 is a perspective view of a mirror body constituting the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG. 3;

FIG. 6 is a perspective view of the donut-shaped object when a mirror body is formed from a part of the donut-shaped object.

FIG. 7 is a schematic cross-sectional view illustrating a difference between a viewing angle according to a conventional side mirror device and a viewing angle according to the present invention.

FIG. 8A is a schematic diagram for explaining a viewing angle in a side mirror device in a case where a convex mirror is arranged in front of one mirror box and a plane mirror is arranged in rear in order to compare with the present invention. FIG. 3B is a cross-sectional view schematically illustrating a viewing angle in a side mirror device in a case where a plane mirror is disposed and combined with a convex mirror at the rear in a single mirror box for comparison with the present invention. It is sectional drawing.

FIG. 9 is a perspective view of an embodiment when using another supporting and fixing means of the present invention.

FIG. 10 is a schematic sectional view illustrating a viewing angle in a conventional side mirror device using a combination of a convex mirror and a plane mirror.

[Explanation of symbols]

B ... Car body support C ... Car G ... Window glass a ... Mirror surface 1 ... Mirror box 2 ... Object window 3 ... Peep window 4 ... Object upper and lower window 5 ... Support fixing means 6 ... Upper mounting piece 7 ... Lower mounting piece 8 ... Hook member 9 mounting string 10 objective mirror (mirror body) 11 viewing mirror 12 objective mirror fixing piece 13 viewing mirror fixing piece 15 mounting arm 16 hinge 20 conventional side mirror device 21 convex mirror 22 reflecting mirror 23 ... Mirror box 24 ... Convex mirror 25 ... Plane mirror 26 ... Objective window 27 ... Peeping window

Claims (3)

[Claims] In a mirror body having a mirror surface, a cross section along one of a vertical line and a horizontal line substantially perpendicular to each other has a concave surface depressed in a concave shape, and a cross section along the other has a convex surface bulging into a convex shape. A wide-angle mirror having a donut mirror surface or an hourglass mirror surface which is continuously formed by being curved, and wherein the curvature of each of the concave surface and the convex surface is substantially the same. 2. The wide-angle mirror according to claim 1, wherein the mirror body is arranged such that its concave surface is along a vertical line and its convex surface is along a horizontal line. 3. The wide-angle mirror according to claim 1, wherein the mirror body is arranged such that its concave surface is along a horizontal line and its convex surface is along a vertical line.