JPH07159718A - Headup display - Google Patents

Abstract

PURPOSE:To make the length of an optical path longer in the size of a miniaturized optical unit and to prevent the effect of a sun beam from being exerted on a headup display for a vehicle. CONSTITUTION:This display is provided with a display means 5 and adopts the arrangement 10 of a reflection means consisting of at least three reflection means and a combiner; three optional reflection means 11, 12 and 13 in the arrangement 10 of the reflection means reflect display light 6 generated from the display means 5 in the order of the reflection means 11, 12 and 13; and further the respective reflection means are arranged so that the display light 6 reflected by the means 12 and arriving at the means 13 is crossed with the display light 6 made incident on the means 11, and further the display light 6 reflected by the means 13 is crossed with the display light 6 made incident on the means 11, and then the display light 6 reflected by the means 13 is crossed with the display light 6 reflected by the means 11 and arriving at the means 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle head-up display. The head-up display has a semi-transparent reflective film such as a hologram or a multi-layered thin film formed on the front window of the vehicle to reflect the image displayed on a display such as a vehicle speedometer with a combiner, and the front view seen by the driver through the combiner. The display image on the display is superposed on the display. By using the head-up display, the driver can see the display of the speedometer etc. from the scene in front without moving the line of sight.

Since such a head-up display is mounted on an automobile or the like, it needs to be small.

[0003]

2. Description of the Related Art FIG. 8 is an explanatory view of a vehicle head-up display. In FIG. 8, reference numeral 200 is a front window of an automobile or the like.

Reference numeral 201 denotes a combiner, which is a semitransparent film such as a hologram or a multilayer reflection film, and is used as the optical unit 20.
The display light of the display 210 emitted from the driver 2
Is reflected in the direction of.

Reference numeral 202 denotes an optical unit, which is an indicator 2
10 and a plurality of reflecting mirrors 211, 212, and 213.
It is reflected by 12, 213 and guided to the combiner 201.

Reference numeral 210 is a display, which is a measuring instrument such as a speedometer. Reference numerals 211, 212, and 213 are reflecting mirrors that reflect the display light of the display 210 and guide it to the combiner 201.

Reference numeral 215 denotes a display image, which is a combiner 20.
It is a display image (virtual image) of the display light reflected by 1. The operation of the configuration of FIG. 8 will be described.

In the optical unit 202, the display 21
The display light of 0 is reflected by the plurality of reflecting mirrors 211, 212, and 213, the optical path is extended, and the combined light is incident on the combiner 201. The driver 220 recognizes the display image 215 of the display device 210 by superimposing the display image 215 of the display device 210 on the front view seen through the translucent combiner 201 by the display light reflected by the combiner 201. In this way, the driver 220 can check the display on the display 210 without dropping his or her eyes on the dashboard.

FIG. 9 shows an optical unit of a conventional head-up display. FIG. 9A shows a conventional optical unit. In FIG. 9A, 202 is an optical unit.

Reference numeral 203 denotes an opening, which is an opening for emitting display light to the outside. 210 is a display. Reference numeral 231 is the reflecting mirror 1.

Reference numeral 232 is the reflecting mirror 2. Reference numeral 233 is the reflecting mirror 3. 235 is sunlight, which is incident on the reflecting mirror 3 (233) through the opening 203 and is reflected by the reflecting mirror 2 (232),
The light is reflected by the reflecting mirror 3 (233) and re-emitted from the opening 203.

The vertical dimension (65 mm) and the horizontal dimension (110 mm) of the optical unit 202 in FIG. 9A are such that the optical path length (the distance from the display 210 to the reflecting mirror 3 (233)) is 250 mm. belongs to.

In the structure of FIG. 9A, the display light of the display 210 is sequentially reflected by the reflecting mirror 1 (231), the reflecting mirror 2 (232), and the reflecting mirror 3 (233), and emitted from the opening 203. To be done. The display light whose optical path length is extended in this way is incident on a combiner (not shown).

In the configuration of FIG. 9A, the sunlight 235 may enter through the opening 203, be reflected by the internal reflecting mirror, and be re-emitted from the opening 203. For example, the sunlight 235 incident from the opening 203 is reflected by the reflecting mirror 3 (23
3), the reflected light is reflected by the reflecting mirror 2 (232) and returns to the reflecting mirror 3 (233), and the reflecting mirror 3 (2
33) and is emitted again from the opening 203.

FIG. 9B shows the structure of a conventional optical unit in the case of eliminating the above-mentioned re-emission of sunlight. The optical unit 202 shown in FIG. 9B is composed of three reflecting mirrors.
Similar to that of (a). Vertical of optical unit 202 (8
5 mm) and lateral (110 mm) dimensions are the optical unit 20.
This is the case where the optical path length of 2 is 250 mm.

In the configuration of FIG. 9B, the reflecting mirror 3 (233)
Since the positional relationship between the reflection mirror 2 (232) and the reflection mirror 2 (232) is vertically separated, the sunlight incident on the reflection mirror 3 (233) is
It is not reflected at (232), or even if it is reflected, it is reflected by the reflecting mirror 3 (233) again and is not emitted again from the opening 203.

In the conventional optical unit, the size of the optical unit must be increased in order to increase the optical path length, and the positional relationship of the reflecting mirrors must be large vertically in order to eliminate the influence of sunlight. I had to enlarge the optical unit.

[0018]

Since the vehicle head-up display is housed under the dashboard, it must be small. Further, in order to make the display image easy for the driver to see, it is necessary to enlarge the display image and display it at a position far from the driver. To reduce the size of the optical unit, it is sufficient to shorten the optical path length, but if the magnification of the displayed image is increased with a short optical path length, the optical aberration also increases, causing distortion or blurring of the displayed image. It becomes difficult to see.

The re-emission of the sunlight incident from the opening not only makes it difficult to see the display image, but also the sunlight incident by the element (concave mirror or the like) having the image forming characteristic in the optical unit. There is a risk of condensing and causing a fire. Therefore, it is necessary to eliminate the effect of sunlight on the head-up display, but as described above, the conventional optical unit had to be upsized in order to prevent the sunlight from being re-emitted.

The present invention provides a small head-up display that can obtain a display image without distortion at a larger magnification by allowing the optical path length to be long even with a small optical unit and is not affected by sunlight. The purpose is to do.

[0021]

The present invention comprises an arrangement of reflecting means consisting of at least three reflecting means for reflecting the display light emitted from the display means and guiding it to the combiner, and any arrangement in the arrangement of the reflecting means is provided. Three reflecting means 11, 12,
Reference numeral 13 is for sequentially reflecting the display light, and intersects the display light 6 from the reflection means 12 to the reflection means 13 with the display light 6 incident on the reflection means 11, and further, the reflection means 1
3 intersects the display light 6 reflected by 3 and the display light 6 incident on the reflecting means 11, and further intersects the display light 6 reflected by the reflecting means 13 and the display light 6 reaching from the reflecting means 11 to the reflecting means 12. Arranged to do so. By arranging such reflecting means, the optical path is formed so as to be folded, and the optical path length can be made long with a small optical unit size. Also,
We determined the placement conditions that are less susceptible to the effects of sunlight and arranged each reflection means according to the placement conditions.

FIG. 1 shows the basic configuration of the present invention. In FIG. 1, 1 is an optical unit.

Reference numeral 5 is a display means, which is a display device such as a speedometer. Reference numeral 10 denotes an arrangement of reflecting means including at least three reflecting means. Reference numeral 11 is a reflection means for entering and reflecting the display light of the display means 5.

Reference numeral 12 is a reflecting means, which is adapted to receive the reflected light from the reflecting means 11 and reflect it. Reference numeral 13 is a reflection means, which is adapted to receive and reflect the reflected light from the reflection means 12.

Reference numeral 16 is a reflecting means, which is arranged at the final stage of the optical path in the optical unit and reflects the display light toward the combiner.

[0026]

The operation of the basic configuration of the present invention shown in FIG. 1 will be described. The display light 6 output from the display means 5 is reflected by the plurality of reflection means 1.
The light is sequentially reflected at 1, 12, and 13, the optical path length is extended, and the light is emitted from the optical unit 1. And it is incident on the combiner.

In the basic configuration of FIG. 1, any three reflecting means 11, 12 and 13 in the arrangement 10 of reflecting means are provided.
Displays the display light 6 generated by the display means 5 to the reflection means 11,
Reflecting in the order of the reflecting means 12 and the reflecting means 13,
The display light reflected by the reflection means 12 and reaching the reflection means 13 and the display light incident on the reflection means 11 are crossed, and the display light reflected by the reflection means 13 and the display light incident on the reflection means 11 are crossed. Then, the respective reflecting means 11, 12, 13 are arranged so that the display light reflected by the reflecting means 13 and the display light reflected by the reflecting means 11 and reaching the reflecting means 12 intersect.

In this way, a large optical path length can be obtained with a smaller optical unit size by folding and reflecting the optical path by the plurality of reflecting means. It should be noted that the display image can be enlarged by configuring one of the optical paths, for example, the final reflecting means 16 with a concave mirror-like means for converging light (the optical path from the display means to the concave mirror is Since it is better to make the length as long as possible, it is preferable that the final reflecting means 16 is a concave mirror). Further, in a head-up display, since the angle of the display light incident on the concave mirror is not necessarily parallel to the optical axis of the concave mirror, the use of the concave mirror tends to cause aberration. Therefore, by constructing the two reflecting means in the optical path, for example, the reflecting means 12 and the reflecting means 13 such as a concave mirror for converging light, the display image can be greatly enlarged compared with the case of one concave mirror, and both of them can be enlarged. The display image can be obtained without aberration and distortion by arranging so as to correct aberration.

A method for preventing the influence of sunlight in the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 is an explanatory diagram (1) of the structure for preventing the influence of sunlight according to the present invention.

FIG. 2A shows the optical paths of the sunlight and the display light when the sunlight is incident on the optical unit. Figure 2 (a)
, M and Mi are reflecting means in the optical unit, for example, M is the last reflecting means, Mi is the i-th reflecting means counted from the display, and the reflecting means immediately before the last reflecting means M. Means (reflecting means one front in the optical path).

The sunlight incident on the optical unit is reflected by the reflecting means M and then by the reflecting means Mi, and the sunlight reflected by Mi returns to the reflecting means M and is reflected by the reflecting means M again to be reflected by the optical unit. Re-emitted from.

Conditions for preventing the sunlight incident on the optical unit from being re-emitted will be described. Sunlight is incident from the opening of the optical unit toward the reflecting means M at various angles. In order to prevent such sunlight from being re-emitted, the reflecting means M and Mi may be arranged so that the perpendicular line extending from the reflecting area of the reflecting means Mi does not overlap the reflecting area of the reflecting means M. There are two types of such arrangement conditions that the sunlight is not re-emitted, and Fig. 2 (b) and Fig. 3 (a) are the limit conditions.

FIG. 2B shows the positional relationship between the reflecting means M and the reflecting means Mi at the limit of re-emission of sunlight. In FIG. 2 (b), the reflection means Mi (both ends are G and H, respectively)
The end point F of the reflection means M (both ends are E and F, respectively) is located on a straight line from the end point G to the line GH. E '
F is a projection of the line segment EF on a straight line passing through F and perpendicular to the line segment FG.

The width of the reflecting means M is L, and the width of the reflecting means Mi is Li. In the relationship between the combiner and the display light outlet of the optical unit, the position of the reflecting means M, the direction of the surface, and the incident angle φ of the display light are determined. Further, the position of the reflecting means Mi can be determined from the condition. Under this condition, the direction of the reflecting means Mi that is not affected by sunlight is obtained.

The incident angle of the display light of the reflecting means Mi is φi. The distance between the center A of the reflecting means M and B of the reflecting means Mi is Si. At this time, since E′F = Lcos (φ−φi) and Sisinφi = (1/2) Lcos (φ−φi) + (1/2) Li, 2Sisinφi−Lcos (φ−φi) = Li. .

[0036] Solving the above equation for sinφi, sinφi = {(2Si- Lsinφ) Li + L (cosφ) × (4Si 2 + L 2 -Li 2 -4SiLsinφ) 1/2} / (L 2 + 4Si 2 -4SiLsinφ) Solar Is not re-emitted, the incident angle φi of the reflecting means Mi is larger than the value of the limit condition of FIG. 2 (b). Therefore, conditions for obtaining is a .phi.i> sin ^-1 [{(2Si-Lsinφ) Li + L (cosφ) × (4Si 2 + L 2 -Li 2 -4SiLsinφ) 1/2} / (L 2 + 4Si 2 -4SiLsinφ) ] .

Similarly, when the limiting condition is given in FIG. 3 (a), 2Sisin φi-Licos (φ + φi) = Li.

Solving the above equation for sinφi, sinφi = {(2Si + Lsinφ) Li + L (cosφ) × (4Si ² + L ² -Li ² + 4SiLsinφ) ^1/2 } / (L ² + 4Si ² + 4SiL sinφ) Therefore, the limiting condition is shown in FIG. In the case of 3 (a), the conditions for preventing the re-emission of sunlight are as follows.

Φi> sin ⁻¹ [{(2Si + Lsinφ) Li + L (cosφ) × (4Si ² + L ² −Li ² + 4SiLsinφ) ^1/2 } / (L ² + 4Si ² + 4SiL sinφ)]

Since it is possible that the sunlight reflected by the final reflection means M enters the reflection means other than Mi, the relationship with the final reflection means for each reflection means satisfies the above conditions. Need to be

For example, consider an optical unit as shown in FIG. In FIG. 3B, 5 is a display means.
_{M 1, M 2, M 3} , M 4 are each reflecting means, those each having a height _{(width) L 1, L 2, L} 3, L 4.

M ₁ 'is an image of M ₁ by M ₂ ,
₁ ″ is an image of M ₃ ′ of M ₁ ′. M ₂ ′ is M ₂
It is an image by M ₃ of.

S ₁ is the optical path length between M ₄ and M ₁ .
S ₂ is the optical path length between M ₄ and M ₂ . S ₃ is the optical path length between M ₄ and M ₃ .

Φ _1, φ _2, φ ₃ , and φ ₄ are the incident angles of the display light of the reflecting means M _1, M _2, M _{3, and} M ₄ , respectively.
In the optical unit shown in Fig. 3 (b), the conditions under which sunlight is not re-emitted can be written as follows.

Φi> sin ⁻¹ [{(2Si + (− 1) ^−k L ₄ sin φ ₄ ) Li + L ₄ × (cos φ ₄ ) (4Si ² + L ₄ ² −Li ² + (− 1) ^k 4SiL ₄ × sin φ ₄ ) ^−1/2 } / (L ₄ ² + 4Si ² + (− 1) ^k 4SiL ₄ × sin φ ₄ )], where i = 1, 2, 3. However, k is one when the direction of the image plane of the corresponding reflecting means is in the direction facing the final reflecting means by the reflecting means which is one forward on the optical path from the final reflecting means M ₄ on the optical path (FIG. 3). (See (a)) is an even number, and when the directions of the faces are not in opposite directions (Fig. 2).
(See (b)) is an odd number.

Generally, φi> sin ^-1 [{(2Si + ( ^-1 ) ^-k Lsinφ) Li + L (cosφ) × (4Si ² + L ² −) for the final reflection means and the i-th reflection means. ^{li 2 + (- 1) k} 4SiLsinφ) 1/2} / (L 2 + 4Si 2 + (- 1) is ^{i 4SiLsinφ)].}

However, L is the height (width) of the reflecting means of the final means, and Li is i counted from the reflecting means of the final means.
The height (width) of the second reflecting means. Further, φ is the incident angle of the final reflecting means, and φi is the i-th reflecting means Mi.
Is the incident angle of. Si is the optical path length between the reflecting means of the final means and the i-th reflecting means. k is the direction of the surface of the image of the corresponding reflecting means by the reflecting means one optical path ahead of the final reflecting means M on the optical path in the same direction as the final reflecting means (the reflecting means Mi or the final reflecting means M). It is even if the direction of the surface of Mi in the case of the reflecting means one ahead in the optical path is in the direction facing the final reflecting means M, and is odd if it is in the direction not facing.

Further, at least one of the reflecting means 11, 12, 13 in the arrangement 10 of the above-mentioned reflecting means may have a wavelength selecting function such as a dielectric multilayer thin film mirror or a hologram mirror. By providing a wavelength selection function, it is possible to prevent external light (sunlight or the like) incident on the display means 5 by tracing the optical path of the display light in the opposite direction to irradiate and heat the display means 5. When the reflecting means having a wavelength selection function is made of a material that reflects only green light and transmits light of other wavelengths, the back surface thereof absorbs transmitted light (for example, , Black light absorbing material).

[0049]

EXAMPLE FIG. 4 shows Example 1 of the present invention. FIG. 4 shows a case where an optical unit is composed of four reflecting mirrors (reflecting means).

In FIG. 4, reference numeral 21 is an optical unit. Reference numeral 25 is a display device (display means).

Reference numeral 25 'is a display image, which is the display image of the display 25. 26 is a combiner. 27 is a front window.

M₁, M₂, M₃, M_FourEach is a reflector
(1), reflector (2), reflector (3), and reflector (4). Anti
Mirror (4) M_FourIs a concave mirror. In the configuration of FIG. 4, the table
The display light output from the indicator 25 is reflected by each reflecting mirror M.₁, M₂，
M₃, M_FourIt is reflected by and is incident on the combiner 26. So
Then, the display light is reflected by the combiner 26 and displayed to the driver.
The image 25 'is visually recognized. Reflector (4) M_FourWith a concave mirror
It is possible to obtain a magnified display image because
It In addition, the reflector M₁, M₂, M₃, M_FourBy the optical path
Since it is taken long enough, the reflector (4) M _FourIs long-focused
Can be used, and a display image 25 'without distortion can be obtained.
it can.

FIG. 5 shows an embodiment of the optical unit of the present invention. FIG. 5 shows an example in which an optical unit is composed of three plane mirrors, one concave mirror and a display. In FIG. 5, reference numeral 21 is an optical unit.

Reference numeral 25 denotes a display, which is a fluorescent display device (V
FD), which is connected to a display control unit (not shown). 26 'is a cover glass.

27 'is the front window of the automobile. M ₁ is a reflecting mirror (1), which is a plane mirror. M ₂ is a reflecting mirror (2), which is a plane mirror.

M ₃ is a reflecting mirror (3), which is a plane mirror. M ₄ is a reflecting mirror (4), which is a concave mirror. S ₀ is an optical path between the display 25 and the reflecting mirror (1) M ₁ .

S ₁ is an optical path between the reflecting mirror (1) M ₁ and the reflecting mirror (2) M ₂ . S ₂ is a reflector (2) M ₂ and a reflector (3) M
The optical path between the _three . S ₃ is a reflector (3) M ₃ and a reflector
(4) It is an optical path between M ₄ .

The optical path length from the display 25 to the reflecting mirror (4) M ₄ is the sum of S ₀ , S ₁ , S ₂ and S ₃ , and a long optical path length can be secured in a narrow space. FIG. 6 is a second embodiment of the present invention.

FIG. 6A shows an example in which an optical unit is composed of four plane mirrors and one concave mirror. In FIG. 6A, reference numeral 21 is an optical unit.

Reference numeral 25 is a display. M ₁ is a reflecting mirror (1), which is a plane mirror. M ₂ is a reflecting mirror (2), which is a plane mirror.

M ₃ is a reflecting mirror (3), which is a plane mirror. M ₄ is a reflecting mirror (4), which is a plane mirror. M ₅ is a reflecting mirror (5), which is a concave mirror.

In FIG. 6A, the number of reflecting mirrors is one more than that in the embodiment of FIG. Therefore, the optical path length is increased and the degree of freedom in design is increased. FIG. 6B shows a case where the optical unit is composed of two plane mirrors and two concave mirrors.

In FIG. 6B, reference numeral 21 is an optical unit. 25 is an indicator.

M ₁ is a reflecting mirror (1), which is a plane mirror. M ₂ is a reflecting mirror (2), which is a concave mirror. M ₃ is a reflecting mirror (3), which is a plane mirror.

M ₄ is a reflecting mirror (4), which is a concave mirror. When a concave mirror is used as the reflecting mirror in the combiner, the display light is incident obliquely to the optical axis of the concave mirror, so that aberrations such as astigmatism and coma are likely to occur. Therefore, in the embodiment of FIG. 6 (b), concave mirrors (M ₂ , M _2
4 ) is used and the positional relationship between the two is arranged so as to cancel astigmatism and coma, so that a display image with less distortion can be obtained. In addition, by using two concave mirrors, the enlargement ratio can be increased as compared with the case of one concave mirror.

FIG. 7 shows a third embodiment of the present invention. Figure 7 (a)
Shows dimensions when an optical unit having an optical path length of 250 mm is constructed by using four reflecting mirrors.

In FIG. 7A, 21 is an optical unit,
25 is an indicator. M ₁ , M ₂ , M ₃ and M ₄ are a reflecting mirror (1), a reflecting mirror (2), a reflecting mirror (3) and a reflecting mirror (4), respectively, which are plane mirrors.

In the structure shown in FIG. 7A, the display 25 is connected to the reflecting mirror.
(4) When the optical path length up to M ₄ is 250 mm, the dimensions of the optical unit are 122 mm × 57 mm. The size of the conventional optical unit with an optical path length of 250 mm is 110 mm × 67.
mm, 110m when the influence of sunlight is eliminated
Since the size is m × 85 mm (see FIGS. 9 (a) and 9 (b)), the optical unit can be downsized in the present invention.

FIG. 7B shows an example in which the optical path is in a three-dimensional space. In Fig. 7 (b), the light rays bent by the reflecting mirrors do not travel on a plane but spirally in a three-dimensional space.

In FIG. 7B, 21 is an optical unit,
25 is an indicator. M ₁ , M ₂ , M ₃ and M ₄ are a reflecting mirror (1), a reflecting mirror (2), a reflecting mirror (3) and a reflecting mirror (4), respectively, which are plane mirrors. M ₅ is a reflecting mirror (5), which is a concave mirror.

In the case where the normal direction of the combiner and the traveling direction of the display light reflected by the combiner are not in the same vertical plane (usually this is the case for passengers), FIG.
When the optical unit of (a) is used, the display observed by the driver rotates and tilts to the right or left. The optical unit must be tilted in order to return the display to a horizontal position, and an extra space is required to mount the optical unit. By arranging the mirrors so that the light travels spirally as shown in FIG. 7 (b), it is not necessary to tilt and mount the optical unit to make the display horizontal. Therefore, a head-up display with good mountability can be configured. ].

[0072]

According to the head-up display of the present invention, it is possible to obtain a magnified display image with little distortion of the display image with a small optical unit. In addition, a small optical unit can be used as a head-up display that is not affected by sunlight. Therefore, the head-up display of the present invention can be easily mounted on a vehicle or the like and can display a display image that is easy for the driver to see.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is an explanatory diagram (1) of a configuration for preventing the influence of sunlight in the present invention.

FIG. 3 is an explanatory diagram (2) of the configuration for preventing the influence of sunlight in the present invention.

FIG. 4 is a diagram showing a first embodiment of the present invention.

FIG. 5 is a diagram showing an example of the unit of the present invention.

FIG. 6 is a diagram showing a second embodiment of the present invention.

FIG. 7 is a diagram showing Embodiment 3 of the present invention.

FIG. 8 is a diagram showing a vehicle head-up display.

FIG. 9 is a diagram showing an optical unit of a conventional head-up display.

[Explanation of symbols]

 1: Optical unit 5: Display means 11: Reflecting means 12: Reflecting means 13: Reflecting means 16: Reflecting means

Claims (7)

[Claims] 1. A head-up display in which the display of the display means (5) is projected on a combiner so that a display image of the display can be seen in a forward view visually recognized by an observer through the combiner. 5) is provided with an arrangement (10) of reflecting means consisting of at least three reflecting means for reflecting the display light (6) generated from (5) and guiding it to the combiner, and any three reflections in the arrangement (10) of the reflecting means. Means (1
1), (12) and (13) are for sequentially reflecting the display light (6), and the display light (6) from the reflection means (12) to the reflection means (13) and the reflection means Cross the display light (6) incident on (11), and further cross the display light (6) reflected by the reflection means (13) and the display light (6) incident on the reflection means (11), Furthermore, the display light (6) reflected by the reflection means (13) and the display light (6) reaching the reflection means (12) from the reflection means (11) are arranged so as to intersect with each other. Up display. 2. The arrangement (1) of the reflection means according to claim 1.
A head-up display, characterized in that at least one reflecting means in 0) is the reflecting means (14) for converging reflected light. 3. The arrangement (1) of the reflecting means according to claim 1.
At least two reflecting means in (0) are reflecting means (14), (15) for converging the reflected light, and the reflecting means (14), (15) are arranged so as to cancel optical aberration and image distortion. A head-up display, which is characterized by being 4. The arrangement according to claim 1, 2 or 3, wherein at least one reflecting means in the arrangement (10) of the reflecting means has a wavelength selecting function for selecting a predetermined wavelength. Head-up display. 5. The head-up display according to claim 4, wherein the arrangement (10) of the reflecting means having a wavelength selection function is constituted by a hologram or a multilayer thin film. 6. The reflecting means M and the reflecting means according to claim 1, 2, 3, 4 or 5, wherein M is a final reflecting means (16) in the optical path and Mi is an i-th reflecting means. The widths of the reflection regions of Mi are L and Li, the optical path length between the reflection means M and the reflection means Mi is Si, and the light reflected from the reflection means Mi at an angle φi is reflected by the reflection means M at an angle φ. Then, the reflection means M and the reflection means Mi have a relationship of φi> sin ⁻¹ [{(2Si + (− 1) ^k Lsinφ) Li + L (cosφ) × (4Si ² + L ² −Li ² + (− 1) ^k · 4SiLsinφ) ^1/2 } / (L ² + 4Si ² + (− 1) ^k · 4SiLsinφ)] (where k is the reflection on the optical path one reflection element before the final reflection means M on the optical path) The orientation of the surface in the image of the means Mi (reflecting means i is an even number if i is the reflecting means one position forward of the reflecting means M in the optical path, and is even if the direction is the direction facing the final reflecting means M; A head-up display characterized by eliminating the effect of sunlight by having a relationship of (odd number). 7. The head-up display according to claim 1, wherein the reflecting means is arranged so that the optical path of the display light (6) is spirally formed in the three-dimensional space. 2.) A head-up display, characterized in that a plurality of reflecting means in (1) are arranged.