KR101738275B1 - Vehicular Room Mirror, Side Mirror and the Mamufacturing Method thereof which uses holographic Optical element - Google Patents

Vehicular Room Mirror, Side Mirror and the Mamufacturing Method thereof which uses holographic Optical element Download PDF

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Publication number
KR101738275B1
KR101738275B1 KR1020150178296A KR20150178296A KR101738275B1 KR 101738275 B1 KR101738275 B1 KR 101738275B1 KR 1020150178296 A KR1020150178296 A KR 1020150178296A KR 20150178296 A KR20150178296 A KR 20150178296A KR 101738275 B1 KR101738275 B1 KR 101738275B1
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KR
South Korea
Prior art keywords
optical element
hologram optical
interference pattern
vehicle
light
Prior art date
Application number
KR1020150178296A
Other languages
Korean (ko)
Inventor
임영태
김남
권기철
Original Assignee
충북대학교 산학협력단
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Priority to KR1020150178296A priority Critical patent/KR101738275B1/en
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Publication of KR101738275B1 publication Critical patent/KR101738275B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
    • B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/04—Rear-view mirror arrangements mounted inside vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/06—Rear-view mirror arrangements mounted on vehicle exterior
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • B60K2350/2026—

Abstract

According to the present invention, disclosed are a vehicular room mirror using a holographic optical element, a side mirror, and a manufacturing method thereof. According to an aspect of the present invention, a vehicular room mirror module comprises: a holographic optical element in which an interference pattern reflecting light of a wavelength band of light from rear head light incident on a surface thereof in a ceiling direction of a vehicle is recorded; and a room mirror of which the holographic optical element is attached to at least a portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle room mirror, a side mirror, and a manufacturing method thereof using a hologram optical element,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle room mirror or a side mirror, and more particularly, to a vehicle room mirror, a side mirror, and a manufacturing method thereof that can prevent a driver's glare at night.

Generally, it is very important for the driver to ensure the driving visibility because the vehicle runs at a high speed in a closed automobile space. Accordingly, the automobile essentially includes a side mirror and a room mirror as means for widening the view of the driver.

However, such a side mirror and a room mirror sometimes reflect the light of the rear headlight to the driver at night to interfere with the driving view.

To prevent this problem, the car is equipped with an ECM mirror that prevents driver glare by adjusting the reflectivity of the mirror when the rear headlight beam is irradiated onto the mirror.

However, the reflectance of the ECM mirror is lowered in order to prevent glare, so that the shape of the rear vehicle can not be properly illuminated at night.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle room mirror, a side mirror, and a method of manufacturing the same that can reflect light from a rear headlight of a specific wavelength band.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

A vehicle room mirror module according to one aspect of the present invention includes: a hologram optical element in which an interference pattern for reflecting light of one wavelength band from a rear headlight incident on a surface thereof in a vehicle ceiling direction is recorded; And a room mirror having the hologram optical element attached to at least a part thereof.

According to another aspect of the present invention, there is provided a vehicular side mirror module including a hologram optical element having an interference pattern for reflecting light of one wavelength band in a direction away from a vehicle, ; And a side mirror to which the hologram optical element is attached at least in part.

According to another aspect of the present invention, a method for manufacturing a vehicle mirror includes the steps of: fabricating a hologram optical element having a size to be attached to a side mirror or a room mirror to be applied; Forming a reflection type interference pattern on both surfaces of the hologram optical element, the reflection type interference pattern reflecting light of one wavelength band out of the light from the rear headlights at a predetermined angle in a direction deviating from the driver's eyes; And attaching the hologram optical element having the reflective interference pattern formed thereon to the side mirror or the room mirror to be applied.

According to the present invention, the intensity of light incident on a driver's eye can be reduced from a rear headlight through a side mirror or a room mirror, thereby preventing driver's glare.

FIGS. 1 to 3 illustrate a process of recording and reproducing information on a hologram film using a coherent or coherent light source. FIG.
4A is a view showing a vehicle room mirror module according to an embodiment of the present invention.
Fig. 4B is a view for explaining a phenomenon in which light from a rear headlight is obstructed by the driver's field of view; Fig.
4C and 4D are views for explaining reflection angles of a vehicle room mirror module according to an embodiment of the present invention.
5A is a configuration diagram showing a vehicle side mirror module according to an embodiment of the present invention.
5B is a view showing a reflection angle of the vehicle side mirror module according to the embodiment of the present invention.
6 is a flowchart illustrating a method of manufacturing a side mirror or a room mirror module for a vehicle according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, advantages and features of the present invention and methods of achieving them will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms " comprises, " and / or "comprising" refer to the presence or absence of one or more other components, steps, operations, and / Or additions.

Hereinafter, a hologram optical element will be described before a specific embodiment of the present invention is described.

A hologram is a three-dimensional image produced by a photo projection technique. Unlike a general 3D image reproduction method, the hologram is an image directly displayed on a plane or a space of a hologram optical element, and can be reproduced without using a separate device in a light environment.

To explain the principle, when a hologram film is exposed to a laser beam, the light energy is converted into chemical energy, and the chemical reaction generates silver-halide particles in the film emulsion.

In this process, the hologram interference pattern is recorded in the hologram film, and when the reproduction beam is reflected on the hologram interference pattern, the hologram image can be reproduced by the diffraction phenomenon of the light passing through the interference pattern.

Hereinafter, an off-axis hologram recording and reproducing process having the features described above with reference to FIGS. 1 to 3 will be described.

1 to 3 are views showing a process of recording and reproducing information on a holographic film using a coherent or coherent light source.

1, an object beam and a reference beam are projected onto a holographic film in an off-axis manner (S110), a grating is recorded (S120), and then a reproduction beam is incident on the holographic film The hologram image can be reproduced (S130). At this time, the same hologram image can be recorded even if the reference light is incident with different incident angles instead of the object light.

First, a holographic recording and reproducing method using a transmission type system will be described.

As shown in FIG. 2, when two recording beams (incident beams 1 and 2; incident beams 1 and 2) are incident on the same surface of the holographic film, a transmissive interference pattern of a lattice pattern is recorded (S210).

Thereafter, when light is incident on the holographic film on which the interference pattern is recorded at an angle of incidence beam 2, the incident angle of the incident light changes in the traveling direction of the incident light 1 (Diffracted beam 1) (S220) .

Similarly, when the interference pattern is incident on the recorded holographic film at the angle of the incident light 1, the incident angle of the incident light changes in the traveling direction of the incident light 2 (Diffracted beam 2) (S230).

Next, the hologram recording and reproduction of the reflection type system will be described.

As shown in FIG. 3, when incident light 1 and 2 are incident on both surfaces of the holographic film, a reflective interference pattern of a lattice pattern is recorded (S310).

Then, when the hologram film on which the reflection interference pattern is recorded is irradiated with light in the same direction as the incident light 1, the irradiated light is deflected in the direction of the incident light 2 (reflected light 1) (S320).

Similarly, when the light in the same direction as the incident light 2 is irradiated, the irradiated light is deflected in the same direction as the incident light 1 (reflected light 2) (S330).

As described above, the hologram film has a feature of diffracting or reflecting incident light at a specific angle according to the interference pattern recorded by a plurality of laser beams.

Hereinafter, a vehicle room mirror module according to an embodiment of the present invention using the hologram optical element having the above-described characteristics will be described with reference to Figs. 4A to 4C.

4B is a view for explaining a phenomenon in which light from a rear headlight is obstructed by the driver's field of view, and FIGS. 4C and 4D are views 1 is a view for explaining reflection angles of a vehicle room mirror module according to an embodiment of the present invention.

4A, the vehicle room mirror module 40 according to the embodiment of the present invention includes a hologram optical element 41, a room mirror 42, and a housing 43. [

The hologram optical element 41 is recorded with a reflection type interference pattern for reflecting the light W1 of one wavelength band in the direction of the vehicle ceiling from the light from the rear headlights incident on the surface thereof. Here, the hologram optical element 41 may be a photopolymer type or a photoresist type hologram film.

Here, one wavelength band may be a blue wavelength band that has a relatively large influence on human eyes among RGB wavelengths. Specifically, it may be at least a part of 470 to 480 nm. Alternatively, one wavelength band may be at least a part of a red wavelength band.

At this time, the reflection type interference pattern corresponds to the front surface direction of the room mirror 42 when the hologram optical element 41 is attached to the room mirror 42 while the two beams having one wavelength band are simultaneously incident on both surfaces of the hologram optical element (180-reflection angle) between the first beam irradiated on the first surface of the room mirror (42) and the second beam irradiated on the second surface corresponding to the back surface direction of the room mirror (42) is less than 135 degrees, Lt; / RTI >

Referring to FIG. 4B, among the white source of the rear headlights of the vehicle, light (sight blocking light) that is reflected by the conventional room mirror 42 and influences the eyes of the driver is reflected by the angle of the room mirror 42 It may be somewhat different depending on the driver's key. However, the angle of incidence of the visual disturbance light may be within a predetermined range.

4C, the first angle? Between the first beam, which is one recording beam, and the first surface 41a of the hologram optical element 41, is such that the light of the vehicle headlight is incident on the room mirror 42 May be one of the angles within a predetermined range of light affecting the eyes of the driver, which may be determined experimentally.

The second angle? Formed by the second beam, which is another recording beam, and the second surface 41b of the hologram optical element 41 may vary according to the first angle?, But only the light from the rear headlight The sum of the first angle [alpha] and the second angle [beta] may be set to be less than 135 degrees in order to prevent the driving field from being disturbed.

4D, the room mirror 42 to which the hologram optical element 41 is applied can reflect light of one wavelength band from the light from the vehicle rear headlight toward the vehicle ceiling by at least 45 degrees (R_W1; Reflected Specific Wavelength).

On the other hand, the hologram optical element 41 reflects the incident light having an angle (for example, an incident angle of the first beam of +/- 3 to 6 degrees) with a predetermined error at the angle of the first beam used at the time of forming the reflection- . Accordingly, in the present invention, it is possible to adjust the angle of reflection ([theta]) of the light so that the light, which may affect the eyes of the driver, out of the driver's vision in the light of the vehicle rear headlight.

The hologram optical element 41 is attached to at least a part of the front surface of the room mirror 42. Here, the hologram optical element 41 may be attached to the entire area of the front surface of the room mirror 42 or may be attached to at least a part of the front surface of the room mirror 42 where the rear headlight is most shaded.

When the hologram optical element 41 is attached to at least a partial area of the front surface of the room mirror 42, the attachment area thereof may be a part of the center of the front surface of the room mirror 42 or a part of the front surface of the room mirror 42 Lt; / RTI >

The housing 43 is configured to surround at least a part of the front surface, the side surface, the flat surface, and the back surface of the room mirror 42 to which the hologram optical element 41 is attached so that the room mirror 42 is placed on the ceiling of the vehicle and on the windshield Secure it to the nearest vehicle ceiling.

As described above, according to the embodiment of the present invention, the light from the rear headlights of the vehicle can be reflected in a direction deviating from the driver's vision by the hologram film, and the driver's glare can be prevented can do.

Further, since the present invention prevents the driver's glare by adjusting the reflection angle (?) Of the blue wavelength band (or red wavelength band) light that gives the greatest glare to the driver's eyes, the mirror performance It is possible to improve the problem that it is difficult to identify the shape of the automobile projected on the room mirror at night.

Hereinafter, a vehicle side mirror module according to an embodiment of the present invention will be described with reference to FIGS. 5A and 5B. FIG. FIG. 5A is a view illustrating a structure of a side mirror module for a vehicle according to an embodiment of the present invention, and FIG. 5B is a diagram illustrating a reflection angle of a side mirror module for a vehicle according to an embodiment of the present invention.

5A, a vehicle side mirror module 50 according to an embodiment of the present invention may include a hologram optical element 51, a side mirror 52, and a housing 53.

The hologram optical element 51 is recorded with a reflection type interference pattern that reflects light of one wavelength band from a light from a rear headlight incident on the surface thereof in a direction away from the vehicle.

In this case, one wavelength band may be a band of 470 ~ 480 nm which is a blue wavelength band which gives relatively energy to human eyes among RGB wavelengths. Alternatively, one wavelength band may be at least a part of a red wavelength band.

Here, the reflection type interference pattern may be formed by incidence of two reference beams of one wavelength band on both surfaces of the hologram optical element 51, with the angle formed by the two beams being less than 150.

When the hologram optical element 51 is applied to the side mirror 52, the reflection type interference pattern is formed by two beams of one wavelength band incident on both sides of the hologram optical element at the same time, (180-reflection angle) formed by the third beam irradiated on the three surfaces and the fourth beam irradiated on the fourth surface corresponding to the back surface of the side mirror 52 may be less than 150 degrees .

At this time, the hologram optical element 51 is configured to have the same reflection angle as that of the hologram optical element 41 of the vehicle room mirror module, and the vehicle room mirror module 40 and the vehicle side mirror module 50 ). ≪ / RTI >

For example, after cutting the hologram optical element having the same interference pattern recorded thereon so as to be applied to the vehicle room mirror module 40 and the vehicle side mirror module 50, the reflected hologram optical element is reflected by the vehicle ceiling And the hologram optical element is attached to the vehicle room mirror module 40 and the vehicle side mirror module 50 so as to face the outside of the vehicle so as not to affect the eyes of the driver.

A hologram optical element 51 is attached to at least a part of the front surface of the side mirror 52. At this time, the hologram optical element 51 may be attached to the entire area of the front surface of the side mirror 52, or may be attached to at least a part of the area of the front surface where the rear head light is most emitted.

For example, when the hologram optical element 51 is attached to at least a part of the front surface of the side mirror 52, the area is formed in a part of the front center of the side mirror 52 or on the side surface of the side mirror 52 It may be a partial region close thereto.

Here, the vehicle side mirror module is provided on both sides of the vehicle, but the side mirror that obstructs the driving view is one side mirror close to the driver's seat. Therefore, the vehicle side mirror module 50 according to the embodiment of the present invention may be provided only on one side close to the driver's seat of the vehicle.

As described above, according to the embodiment of the present invention, the hologram optical element can reflect the light incident on the side mirror from the rear headlight of the vehicle in a direction not obstructing the driving visual field, It is possible to prevent the driver from glare.

In addition, since the present invention prevents the driver's glare by adjusting the angle of reflection of the blue wavelength band light that causes the largest glare on the driver's eyes, it does not affect the performance of the mirror such as the reflectance, It is difficult to identify the shape of the vehicle projected on the vehicle.

Hereinafter, a manufacturing method of at least one of the vehicle side mirror and the room mirror module according to the embodiment of the present invention will be described with reference to FIG. 6 is a flowchart illustrating a method of manufacturing a vehicle side mirror or a room mirror module according to an embodiment of the present invention.

Referring to FIG. 6, hologram optical elements 41 and 51 are manufactured to have a size to be attached to a side mirror or a room mirror to be applied (S610).

Subsequently, two beams of one wavelength band are irradiated to both surfaces of the manufactured hologram optical element 41 and 51 so as to correspond to the angle at which the rear headlights are to be reflected, and a reflection corresponding to the reflection angle [theta] Type interference pattern is recorded (S620). At this time, the hologram optical elements 41 and 51 can record the reflection type interference pattern in a state where the incidence angles of the two beams are fixed to the fixing jig.

The hologram optical elements 41 and 51 are attached to predetermined positions of the side mirrors or the room mirrors to be applied, and then mounted on the housings 43 and 53 to manufacture a side mirror or a room mirror module for a vehicle (S630).

On the other hand, in the above-described embodiment, the case where the hologram optical elements 41 and 51 are manufactured to a predetermined size and then the reflection interference pattern is recorded has been described as an example. Alternatively, the hologram optical element may be formed by a process of recording a reflective interference pattern on a hologram film capable of producing a plurality of hologram optical elements, and then cutting the hologram optical element to a predetermined size.

While the present invention has been described in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the above-described embodiments. Those skilled in the art will appreciate that various modifications, Of course, this is possible.

In the above description, the case where the hologram optical element is applied to a vehicle room mirror and a side mirror has been described as an example. Alternatively, however, the hologram optical element may be applied to a vehicle windshield or window, or it may be comprised of a transparent sun visor, and may be used as a means to prevent disturbing the driver's view during the day.

Accordingly, the scope of protection of the present invention should not be limited to the above-described embodiments, but should be determined by the description of the following claims.

40: vehicle room mirror module, 50: vehicle side mirror module
41, 51: hologram optical element, 43, 53: housing
42: Room mirror, 52: Side mirror

Claims (11)

A hologram optical element in which an interference pattern for reflecting light of one wavelength band in the direction of the vehicle ceiling from light from a rear headlight incident on the surface of the hologram optical element is recorded; And
And a room mirror having the hologram optical element attached to at least a part thereof,
Wherein the interference pattern reflects light of one wavelength band at a reflection angle of at least 45 degrees in a vehicle ceiling direction,
Wherein an angle formed between a first beam incident on a front surface of the hologram optical element and a second beam incident on a rear surface of the hologram optical element is 135 degrees And the interference pattern is formed so that the interference pattern is smaller than the interference pattern. 4. The method of claim 1,
A room mirror module for a car that is a red-based waveband or a blue-based waveband. The apparatus of claim 2, wherein the blue-
A vehicle room mirror module that is at least part of a band from 470 to 480 nm. delete delete A hologram optical element on which an interference pattern is recorded, the hologram optical element reflecting light of one wavelength band out of light from a rear headlight incident on the surface thereof in a direction away from the vehicle; And
And a side mirror to which the hologram optical element is attached at least in part,
Wherein the hologram optical element is a hologram optical element having a hologram optical element and a hologram optical element, the hologram optical element having a hologram optical element and a hologram optical element, And the interference pattern is formed so that the interference pattern is smaller than the interference pattern. delete The method of claim 6, wherein the one-
A side mirror module for a vehicle that is a red-colored waveband or a blue-based waveband. 9. The apparatus of claim 8, wherein the blue-
A side mirror module for a vehicle that is at least part of a band from 470 to 480 nm. Fabricating a hologram optical element of a size to be attached to a side mirror or a room mirror to be applied;
Forming a reflection type interference pattern on both surfaces of the hologram optical element, the reflection type interference pattern reflecting light of one wavelength band of light from the rear headlights at a predetermined angle (?) In a direction deviating from the driver's eyes; And
And attaching the hologram optical element in which the reflective interference pattern is formed to the side mirror or the room mirror to be applied,
In the case of a room mirror, two beams of one wavelength band are simultaneously incident on both surfaces of the hologram optical element, and a first beam incident on the front surface of the hologram optical element and a second beam incident on the rear surface of the hologram optical element The interference pattern is formed such that the angle formed is less than 135 degrees,
In the case of the side mirror, a third beam incident on the front surface of the hologram optical element and a fourth beam incident on the rear surface of the hologram optical element are simultaneously incident on both surfaces of the hologram optical element, Wherein the interference pattern is formed so that the angle formed by the interference pattern is less than 150 degrees. 11. The method of claim 10,
Wherein at least one of the red wavelength band or the blue wavelength band is at least part of the wavelength band.
KR1020150178296A 2015-12-14 2015-12-14 Vehicular Room Mirror, Side Mirror and the Mamufacturing Method thereof which uses holographic Optical element KR101738275B1 (en)

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KR1020150178296A KR101738275B1 (en) 2015-12-14 2015-12-14 Vehicular Room Mirror, Side Mirror and the Mamufacturing Method thereof which uses holographic Optical element

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Application Number Priority Date Filing Date Title
KR1020150178296A KR101738275B1 (en) 2015-12-14 2015-12-14 Vehicular Room Mirror, Side Mirror and the Mamufacturing Method thereof which uses holographic Optical element

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2701186C1 (en) * 2018-01-09 2019-09-25 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" Selective mirror

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003002116A (en) * 2001-06-19 2003-01-08 Dainippon Printing Co Ltd Mirror with hologram for vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003002116A (en) * 2001-06-19 2003-01-08 Dainippon Printing Co Ltd Mirror with hologram for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2701186C1 (en) * 2018-01-09 2019-09-25 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" Selective mirror

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