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GB2271139A - Vehicle window with insert of high infra-red transmittance - Google Patents

Vehicle window with insert of high infra-red transmittance Download PDF

Info

Publication number
GB2271139A
GB2271139A GB9220861A GB9220861A GB2271139A GB 2271139 A GB2271139 A GB 2271139A GB 9220861 A GB9220861 A GB 9220861A GB 9220861 A GB9220861 A GB 9220861A GB 2271139 A GB2271139 A GB 2271139A
Authority
GB
United Kingdom
Prior art keywords
insert
sheet
window according
infra
windscreen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9220861A
Other versions
GB9220861D0 (en
Inventor
John Norman Bearon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilkington Group Ltd
Original Assignee
Pilkington PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilkington PLC filed Critical Pilkington PLC
Priority to GB9220861A priority Critical patent/GB2271139A/en
Publication of GB9220861D0 publication Critical patent/GB9220861D0/en
Publication of GB2271139A publication Critical patent/GB2271139A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10293—Edge features, e.g. inserts or holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/002—Windows; Windscreens; Accessories therefor with means for clear vision, e.g. anti-frost or defog panes, rain shields

Landscapes

  • Laminated Bodies (AREA)

Abstract

A motor vehicle window (W) and a method of making the same is disclosed. The window (W) comprises a sheet (1) and an insert (2). The insert (2) fits into a recess in the sheet (1) and is comprised of a material which has a higher infra-red light transmittance than the sheet (1). An infra-red camera (3) is aligned with the insert (2) in such a way that the camera (3) receives infra-red light from the scene in front of the vehicle through the insert (2). The infra-red camera (3) is operatively connected with a visual display unit (4) whose output may be projected by suitable optics towards the windscreen (W) and reflected therefrom to a driver (D) of the vehicle in the manner of a head up display. <IMAGE>

Description

Motor Vehicle Windows This invention concerns improvements in or relating to motor vehicle windows and especially automotive windscreens.
Automotive windscreens are generally made from glass and are usually of laminated form having two glass plies sandwiching an interlayer of plastics material. Automotive windscreens necessarily have to give a high visible light transmission to enable the vehicle drivers to see safely through them. In some driving conditions, particularly fog, the visible light received by the driver cannot provide a clear picture of the view ahead and it has been proposed to augment his vision by means of an infra-red camera and a visible display derived from the camera's view (see for example DE 4032927A).However, automotive windscreens, and motor vehicle windows generally, are usually opaque to infra-red radiation beyond about 2.5 microns whereas infra-red light particularly useful for vision enhancement purposes falls within the 5 to 15' microns range, and especially the 8 to 14 micron band sometimes referred to as the thermal infra-red.
It is to be understood that in the present description and claims the term 'infra-red light' is used for convenience (as is commonly done in the optical art) to refer to electromagnetic radiation beyond the red end of the visible spectrum.
According to the present invention there is provided a motor vehicle window comprising a sheet and an insert in the sheet of higher infra-red light transmittance than the sheet Usually the sheet will have high visible but low infra-red light transmittance and the insert will have high infra-red light transmittance.
The insert may be mounted in a peripheral recess but is preferably mounted in a hole in the sheet. The hole and the insert are preferably of substantially circular shape.
The insert is preferably of substantially the same thickness as the sheet and its outer face is preferably flush with the outer (in use) face of the sheet. Where the sheet comprises two plies laminated together with an interlayer, the insert may be stepped to fit different sized holes or peripheral recesses in the respective plies.
For example, the outer (in use) ply may have a larger hole or peripheral recess than the inner ply.
The sheet may be basically of glass and the insert may be of zinc sulphide.
The window may in particular be an automotive windscreen in which case the insert is preferably within the wiped area, i.e. the area traversed in use by windscreen wipers.
The invention further provides a method of making a laminated windscreen or other vehicle window as set forth above comprising the steps of forming the holes in the plies separately, and thereafter bending the plies together under heat to a required curvature.
In order that the invention may be better understood, embodiments thereof will now be described, by way of example, with reference to the accompanying drawings, in which:- Figure 1 is a schematic representation of a car windscreen in section with an associated infra-red viewing system, Figure 2 is a schematic perspective view of a car windscreen in a car body, Figures 3 and 4 are sections through car windscreens, Figure 5 is a schematic section through a windscreen with an associated vacuum cup used in its manufacture, and Figure 6 is a schematic perspective view of a car windscreen in a car body.
Figure 1 shows a car windscreen W comprising a sheet 1 having an insert 2 which forms a segment of the windscreen.
The sheet 1 is basically of glass and has a high visible light transmittance, i.e. a transmission of at least 50% and usually more than 70%, but a low transmittance of infra-red light in the 5 to 15 microns waveband, i.e. less than 50% and probably less than 30% transmission in many cases tending virtually to zero. The insert 2 is of zinc sulphide and has a high infra-red light transmittance, i.e.
a transmission of at least 50% and preferably more than 60% in the 5 to 15 micron waveband. Behind the windscreen and aligned with the insert 2 is an infra-red camera 3 operatively connected with a visible display unit 4. In use the car driver D views the forward scene through the windscreen by means of visible light from that scene transmitted through the sheet 1. In adverse conditions, such as fog, the driver's view of the scene can be augmented by the infra-red system producing a visible display of the forward scene on the unit 4. Specifically the camera 3 receives infra-red light from the scene transmitted through the insert 2. The received infra-red light may be emitted by objects forming the scene, i.e. a passive system, or may be emitted from one or more headlamps (which may be supplementary headlamps) on the car and reflected from the scene objects.The output from the visible display unit may be projected by suitable optics towards the windscreen and reflected therefrom to the driver D in the manner of a head-up display so as to superimpose the display on the driver's forward view of the actual scene. The infra-red system comprising camera, display unit and possibly special headlamps may be switched on and off under driver control or automatically responsively to detection of appropriate adverse viewing conditions.
The location of the insert 2 in the car windscreen is preferably as shown in Figure 2, i.e. substantially centrally across its width and towards, but not at, the top of its height. This provides a good view of the forward scene compatible with the driver's normal view. Further, the insert 2 is located within the range of action R of a windscreen wiper 5 which, as it wipes, cleans the insert 2 as well as the wiped area of the sheet 1. If desired a special washer may be arranged to direct a jet of cleaning liquid, such as water, onto the insert's outer surface.
Such location of the insert 2 is conveniently achieved by mounting it in a hole in the sheet 1 as shown in Figure 3 which illustrates the windscreen W mounted in a car body B. The hole is preferably circular and the insert 2 is of essentially disc-like form to fit in the hole, a layer of suitable adhesive 6 being applied to secure and seal the insert in the sheet. The seal should be watertight and weatherproof and the adhesive should be sufficiently stable to ultra-violet radiation not to deteriorate or discolour and is preferably clear and transparent. The thickness of the insert 2 is the same as that of the sheet 1 so that their inner and outer surfaces lie flush. It will be understood that flush outer surfaces in particular are important to facilitate effective wiping as mentioned above.In Figure 3 the hole wall and the peripheral wall of the insert are shown as normal to the sheet surfaces, i.e. cylindrical. The disc insert may in practice be of frusto-conical form with the hole correspondingly tapered.
Alternatively, with a laminated sheet as shown in Figure 4 having inner and outer glass plies 7 and 8 with a plastics interlayer 9 sandwiched between them, the disc insert 2 may have a peripheral step 10 to provide a head 11 of greater diameter than its inner part 12. The outer ply 8 has a hole of larger diameter, corresponding to that of the head 11, than the hole in the inner glass ply 7 whose diameter corresponds to that of the part 12. Again the insert 2 is mounted in the laminated sheet by the application of suitable a adhesive 6. In a laminated windscreen it is common for the outer glass ply to be thicker than the inner one and with this arrangement the insert head 11 can be correspondingly thicker than its inner part 12 to give greater mechanical strength to the projecting rim of the head. The arrangement could, however, be reversed so as to have the larger diameter hole in the inner ply.
The windscreen may be made by a method comprising the following steps: (a) The glass plies are separately cut to shape from rectangular flat glass sheets in well known manner.
(b) The holes are cut, of the required sizes and at the required location, separately in the two plies.
(c) The plies are bent in a furnace to the required curvature in a well known manner.
(d) The curved plies have a sheet of interlayer material interposed between them, the excess projecting interlayer is trimmed and a hole is cut in the interlayer where the ply holes are located.
(e) Air is drawn out and the interlayer softened sufficiently to bond the plies lightly together in a basically well known manner (sometimes referred to as 'pre-nipping') by using a peripheral vacuum ring while passing the assembly through an oven. However, as shown in Figure 5, a special vacuum cup 13 having two flexible rubber parts 14 and 15 and a central air duct 16 is fitted over the holes and connected to the same vacuum source as the peripheral ring.
(f) The assembly is then autoclaved in well known manner under the correct conditions of temperature, pressure and time to bond the two plies, with interposed interlayer, firmly together.
(g) After removal from the autoclave remaining excess interlayer material may be trimmed from the periphery and in the hole.
By cutting the holes in the glass plies before furnacing, compressive stresses can form around the holes during and after furnacing which help to strengthen the holes for subsequent handling.
If desired, an insert 17 could be mounted in a peripheral recess in a sheet 18 of a windscreen, as shown in Figure 5, instead of in a hole as shown in Figure 2.
Such insert 17 may be wholly of highly infra-red transmitting material or may be a composite insert partly of such infra-red transmitting material and partly of some other material. The shape of the recess and insert may be chosen to be suitable and convenient for effecting insertion in the peripheral recess. Such arrangement may be simpler to manufacture, with addition of the insert constituting a separate stage, but generally provides a less advantageous insert location.
It will be appreciated that the hole (or peripheral recess) shape and size can be selected to suit requirements. It should be noted, however, that allowance needs to be made for the angle of rake of the windscreen so that the hole and insert diameter need to be greater than the effective aperture required for the camera. Typically an insert diameter of the order of 10 cm may be appropriate. The rake angle of the windscreen can in practice be advantageous in that, with the windscreen and infra-red camera relatively angled, infra-red light emitted by the camera is not reflected back to it by the windscreen surface.
It will further be appreciated that the specific material of zinc sulphide mentioned above is given by way of example and other materials with high infra-red transmission could be employed. Some infra-red transmitting materials or forms of material also have high visible light transmission and could be used for the insert. However, these tend to be expensive (and may have other disadvantages such as low mechanical strength) so less expensive materials which are highly transmissive to the infra-red, but substantially opaque to the visible, may be used, particularly since the insert need occupy only a small area of the windscreen.
It will yet further be appreciated that the specifically described locations for the insert in the windscreen are given by way of example and other locations are feasible. Also, with a laminated window such as a windscreen, the segment may also be formed in two parts, with an interposed adhesive or interlayer, corresponding to the plies of the laminate. Further, the vehicle window could be other than a windscreen, for example a rearlight, and need not be laminated but could be a monolith (as schematically shown in Figure 3).

Claims (14)

1. A motor vehicle window comprising a sheet and an insert in the sheet of higher infra-red transmittance than the sheet.
2. A window according to Claim 1 in which the sheet is of high visible but low infra-red light transmittance, and the insert is of high infra-red light transmittance.
3. A window according to Claim 1 or Claim 2 in which the insert is mounted in a peripheral recess in the sheet.
4. A window according to Claim 1 or Claim 2 in which the insert is mounted in a hole in the sheet.
5. A window according to Claim 4 in which the hole and insert are of substantially circular shape.
6. A window according to any of Claims 1 to 5 in which the insert is of substantially the same thickness as the sheet.
7. A window according to any of Claims 1 to 6 in which the outer face of the insert is flush with the (in use) outer face of the sheet.
8. A window according to any of Claims 1 to 7 in which the sheet comprises two plies laminated together with an interlayer.
9. A window according to Claim 8 in which the insert is stepped to fit different sized holes or peripheral recesses in respective said plies.
10. A window according to Claim 9 in which the outer (in use) ply has a larger hole or peripheral recess than the inner ply.
11. A window according to any of Claims 1 to 10 in which the sheet is basically of glass and the insert is of zinc sulphide.
12. A window according to any preceding claim in the form of an automotive windscreen.
13. A windscreen according to Claim 12 in which the insert lies within the wiped area.
14. A method of making a laminated windscreen or other window according to any of Claims 8 to 10 comprising the steps of forming holes in the plies separately, and thereafter bending the plies together under heat to a required curvature.
GB9220861A 1992-10-03 1992-10-03 Vehicle window with insert of high infra-red transmittance Withdrawn GB2271139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9220861A GB2271139A (en) 1992-10-03 1992-10-03 Vehicle window with insert of high infra-red transmittance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9220861A GB2271139A (en) 1992-10-03 1992-10-03 Vehicle window with insert of high infra-red transmittance

Publications (2)

Publication Number Publication Date
GB9220861D0 GB9220861D0 (en) 1992-11-18
GB2271139A true GB2271139A (en) 1994-04-06

Family

ID=10722944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220861A Withdrawn GB2271139A (en) 1992-10-03 1992-10-03 Vehicle window with insert of high infra-red transmittance

Country Status (1)

Country Link
GB (1) GB2271139A (en)

Cited By (46)

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Publication number Priority date Publication date Assignee Title
EP0686865A1 (en) * 1994-06-09 1995-12-13 Delco Electronics Corporation Night vision system for motor vehicles
DE10126492A1 (en) * 2001-05-31 2002-12-19 Daimler Chrysler Ag Methods for improving visibility in vehicles
EP1282097A2 (en) 2001-08-04 2003-02-05 DaimlerChrysler AG Method for improving visibility, in particular in vehicles
EP1275981A3 (en) * 2001-06-30 2004-01-02 DaimlerChrysler AG Device for improving visibility in vehicles
DE10010599B4 (en) * 2000-03-03 2005-12-15 Daimlerchrysler Ag vehicle window
EP1464632A4 (en) * 2002-01-11 2006-04-19 Nippon Sheet Glass Co Ltd Vehicle-use shatter-proof glass and production method therefor
DE102004054161A1 (en) * 2004-11-10 2006-08-03 Daimlerchrysler Ag Infrared light detection area for windshield of motor vehicle has pane of vehicle connected to heat conducting heating element which encloses the area, at least partly
WO2009030476A1 (en) * 2007-09-05 2009-03-12 Saint-Gobain Glass France Glass pane having a detector for electromagnetic radiation
WO2010146318A1 (en) * 2009-06-19 2010-12-23 Saint-Gobain Glass France Method for making laminated glazing and laminated glazing including at least one hole
DE102012101042A1 (en) * 2012-02-09 2013-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Insert element for rear window of motor vehicle, has hole near window lower edge for incorporating wiper shaft of windscreen wiper, where hole is inserted into notch of rear window of laminated glass
EP2660045A1 (en) * 2012-05-04 2013-11-06 Pilkington Group Limited A laminated glazing with a member bonded thereto
DE102007012993B4 (en) * 2006-03-14 2014-04-10 Ford Global Technologies, Llc Device for outward-facing IR cameras mounted in the interior of a vehicle
US8818042B2 (en) 2004-04-15 2014-08-26 Magna Electronics Inc. Driver assistance system for vehicle
EP1193048B2 (en) † 2000-09-29 2014-09-03 Asahi Glass Company, Limited Laminated glass and automobile employing it
US8917169B2 (en) 1993-02-26 2014-12-23 Magna Electronics Inc. Vehicular vision system
DE102013017873A1 (en) * 2013-10-26 2015-04-30 Daimler Ag Windshield and motor vehicle
US9171217B2 (en) 2002-05-03 2015-10-27 Magna Electronics Inc. Vision system for vehicle
DE102005062272B4 (en) * 2005-12-24 2016-03-10 Volkswagen Ag Windshield and lane detection system for a motor vehicle
US9436880B2 (en) 1999-08-12 2016-09-06 Magna Electronics Inc. Vehicle vision system
WO2017188415A1 (en) * 2016-04-27 2017-11-02 旭硝子株式会社 Window member and vehicle window glass
WO2018151235A1 (en) * 2017-02-20 2018-08-23 Ａｇｃ株式会社 Window glass
US10071676B2 (en) 2006-08-11 2018-09-11 Magna Electronics Inc. Vision system for vehicle
WO2019012962A1 (en) * 2017-07-13 2019-01-17 Ａｇｃ株式会社 Window glass for automobiles
DE102019207011A1 (en) * 2019-05-15 2020-11-19 Zf Friedrichshafen Ag Optical sensor on a motor vehicle
WO2021006004A1 (en) 2019-07-08 2021-01-14 Ａｇｃ株式会社 Vehicle body resin member, window member with vehicle body resin member, and vehicle
WO2021014857A1 (en) 2019-07-24 2021-01-28 Ａｇｃ株式会社 Vehicular exterior member and exterior member for far-infrared camera-equipped vehicle
WO2021043838A1 (en) 2019-09-06 2021-03-11 Saint-Gobain Glass France Vehicle glass panel with insert and associated thermal camera device
JP2021088365A (en) * 2016-04-27 2021-06-10 Ａｇｃ株式会社 Glass plate product
WO2021112144A1 (en) 2019-12-06 2021-06-10 Ａｇｃ株式会社 Glass for vehicles, and camera unit
WO2021136909A1 (en) 2020-01-03 2021-07-08 Saint-Gobain Glass France Device with glazing and associated thermal camera, and optimization methods
WO2021182290A1 (en) 2020-03-11 2021-09-16 Ａｇｃ株式会社 Vehicle glass, frame member, and method for manufacturing vehicle glass
WO2021240112A1 (en) 2020-05-28 2021-12-02 Saint-Gobain Glass France Glazed element, device with glazed element and associated thermal imaging camera
WO2022023650A1 (en) 2020-07-30 2022-02-03 Saint-Gobain Glass France Vehicle glazing element with insert and associated device with thermal imaging camera
DE102020212155A1 (en) 2020-09-28 2022-03-31 Continental Automotive Gmbh laminated safety glass
WO2022149583A1 (en) 2021-01-07 2022-07-14 Ａｇｃ株式会社 Glass for vehicle
WO2022149374A1 (en) 2021-01-08 2022-07-14 Ａｇｃ株式会社 Vehicle glass and method for manufacturing vehicle glass
WO2022219273A1 (en) * 2021-04-14 2022-10-20 Saint-Gobain Glass France Laminated vehicle glazing and device comprising an associated near-infrared detection system
CN115226396A (en) * 2021-02-19 2022-10-21 法国圣戈班玻璃厂 Laminated glazing, related equipment with near-infrared vision systems
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WO2023062169A1 (en) * 2021-10-14 2023-04-20 Agc Glass Europe Glazing with insert
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DE10010599B4 (en) * 2000-03-03 2005-12-15 Daimlerchrysler Ag vehicle window
EP1193048B2 (en) † 2000-09-29 2014-09-03 Asahi Glass Company, Limited Laminated glass and automobile employing it
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EP1262795A3 (en) * 2001-05-31 2004-04-14 DaimlerChrysler AG Method and apparatus for improving visibility in a vehicle
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US7015944B2 (en) 2001-06-30 2006-03-21 Daimlerchrysler Ag Device for improving visibility in vehicles
EP1282097A3 (en) * 2001-08-04 2004-01-07 DaimlerChrysler AG Method for improving visibility, in particular in vehicles
EP1282097A2 (en) 2001-08-04 2003-02-05 DaimlerChrysler AG Method for improving visibility, in particular in vehicles
EP1464632A4 (en) * 2002-01-11 2006-04-19 Nippon Sheet Glass Co Ltd Vehicle-use shatter-proof glass and production method therefor
US7175290B2 (en) 2002-01-11 2007-02-13 Nippon Sheet Glass Company, Limited Laminated glass for vehicles and method for manufacturing the same
US7258454B2 (en) 2002-01-11 2007-08-21 Nippon Sheet Glass Company, Limited Laminated glass for vehicles and method for manufacturing the same
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US10735695B2 (en) 2004-04-15 2020-08-04 Magna Electronics Inc. Vehicular control system with traffic lane detection
US11503253B2 (en) 2004-04-15 2022-11-15 Magna Electronics Inc. Vehicular control system with traffic lane detection
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US9948904B2 (en) 2004-04-15 2018-04-17 Magna Electronics Inc. Vision system for vehicle
US9428192B2 (en) 2004-04-15 2016-08-30 Magna Electronics Inc. Vision system for vehicle
US11847836B2 (en) 2004-04-15 2023-12-19 Magna Electronics Inc. Vehicular control system with road curvature determination
US10015452B1 (en) 2004-04-15 2018-07-03 Magna Electronics Inc. Vehicular control system
US9736435B2 (en) 2004-04-15 2017-08-15 Magna Electronics Inc. Vision system for vehicle
US10110860B1 (en) 2004-04-15 2018-10-23 Magna Electronics Inc. Vehicular control system
DE102004054161A1 (en) * 2004-11-10 2006-08-03 Daimlerchrysler Ag Infrared light detection area for windshield of motor vehicle has pane of vehicle connected to heat conducting heating element which encloses the area, at least partly
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