EP0216692B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Windscreen having a particular reflection direction to reflect optical signals into the field of vision of the driver
Assignee: Vegla Vereinigte Glaswerke GmbH
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Filing: 1986-09-10
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Granted: 1991-05-08
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Expires: 2006-09-10
Abstract
No abstract record available.
Inventors
- 👤 Armin Felske
- 👤 Bernd Stoffregen
- 👤 Manfred-Andreas Beeck
- 👤 Gerd Sauer
- 👤 Michael Hassiepen
- 👤 Detlev Rebenstorff
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:24
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B27/0103; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B60; B60K; B60K35/00; B60K35/20; B60K35/21; B60K35/23; B60K35/231; B60K35/28; B60K35/285; B60K35/50; B60K35/60; B60K2360/00; B60K2360/77; B60K2360/785; G02B2027/0105; G02B2027/0107; G02B2027/0109; G02B2027/0118; G02B2027/012; G02B5/00; G02B5/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
57 words
Viewing system of the "head up" type, intended to be fitted to an automobile curved windscreen, comprising a holographic mirror which allows the appearance, within the field of view of the driver, of signals carrying visual information, characterized in that it is the windscreen (1) itself which is the support for the holographic mirror (6, 24, 28).
Claim 2
Dependent Claim
57 words
Viewing system of the "head up" type, intended to be fitted to an automobile curved windscreen, comprising a holographic mirror which allows the appearance, within the field of view of the driver, of signals carrying visual information, characterized in that it is the windscreen (1) itself which is the support for the holographic mirror (6, 24, 28).
Claim 3
Dependent Claim
33 words
Viewing system according to Claim 1, characterized in that the holographic mirror produces the effect of a plane mirror and that the inclination of this plane is different from that of the windscreen.
Claim 4
Dependent Claim
31 words
Viewing system according to Claim 2, characterized in that the angle which the reflected light rays make with the perpendicular to the mirror may differ from that of the incident rays.
Claim 5
Dependent Claim
25 words
Viewing system according to one of the preceding Claims, characterized in that the light illuminating the signals which carry the visual information is substantially monochromatic.
Claim 6
Dependent Claim
27 words
Viewing system according to one of the preceding Claims, characterized in that the visual information comprises one or more images inscribed in the hologram (6, 24, 28).
Claim 7
Dependent Claim
32 words
Viewing system according to Claim 5, characterized in that the hologram (28) is a volumetric hologram, in which several images are inscribed, appearing when they are illuminated, each by a different wavelength.
Claim 8
Dependent Claim
32 words
Viewing system according to Claim 4, characterized in that the holographic mirror is made of a volumetric hologram, in which the signals coming from different directions also have different, substantially monochromatic colours.
Claim 9
Dependent Claim
46 words
Viewing system according to Claim 5 and Claim 7, characterized in that the hologram (24) is a volumetric hologram, in which there are inscribed several images appearing when they are illuminated, each at a different angle of incidence (-y i , y 2 , 'Y s).
Claim 10
Dependent Claim
33 words
Viewing system according to any one of Claims 1 to 8, characterized in that the holographic mirror (6, 24, 28) reflects rays forming an image focussed by means of a projection optic (11).
Claim 11
Dependent Claim
27 words
Viewing system according to Claim 1, characterized in that the holographic mirror (6, 24, 28) produces the effect of a curved mirror which directly supplies focussed images.
Claim 12
Dependent Claim
25 words
Viewing system according to Claim 9 or Claim 10, characterized in that the focussing is effected at a great distance in front of the windscreen.
Claim 13
Dependent Claim
33 words
Windscreen realizing a viewing system according to one of the preceding Claims, characterized in that the hologram (6, 24, 28) is disposed between the two glass sheets (16, 17) of a laminated windscreen.
Claim 14
Dependent Claim
42 words
Windscreen realizing a viewing system according to one of Claims 1 to 11, characterized in that the hologram (6) is disposed on the surface of the windscreen nearest the passenger compartment and is covered by a protective film (20) of plastics material.
Claim 15
Dependent Claim
23 words
Windscreen according to Claim 12 or 13, characterized in that the hologram (6) is disposed below the main viewing field of the windscreen.
Claim 16
Dependent Claim
58 words
A method of making a hologram for a windscreen according to Claim 1, characterized in that, before the hologram is recorded, the supporting film comprising the sensitized layer is placed between two sheets of glass having the curvature of the curved windscreen, the glass sheets are pressed together and the hologram is developped on the curved sensitized layer.
References Cited (Backward Citations)
No citation records indexed.
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