US3767288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for illuminating the traveling path of a vehicle and protecting the driver from dazzling
Assignee: Battelle Memorial Institute Inc
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Filing: 1971-12-01
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Granted: 1973-10-23
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Expires: 1991-12-01
Abstract
Abstract A device for illuminating the travelling path of a vehicle and protecting the driver thereof from dazzling by opposed source of light, comprising at least one headlight with a source of light formed by a linear light radiator whose light emission is limited mainly to certain spectral lines distributed over the visible range, and an optical filter adapted to the light emission of the linear radiator and arranged between the travelling path of the vehicle and the driver thereof, the optical filter being penetrable by the light coming from said headlight and being impenetrable by light of other wave-lengths.
Inventors
- 👤 D Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:49
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283; G02B27/285; F; F21; F21S; F21S41/00; F21S41/10; F21S41/12; F21S41/125; F21S41/135; G02B5/00; G02B5/30; G02B5/3025; G02B5/3066
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
135 words
A device for illuminating the travelling path of a vehicle and protecting the driver from dazzling by opposed sources of light, comprising at least one headlight having a source of light in the form of a linear irradiator whose light emission is mainly limited to certain spectral lines distributed over the visible range, and an optical filter adapted to the light emission of the linear irradiator and arranged between the travelling path of the vehicle and the driver thereof, said optical filter being penetrable by the light coming from said headlight and being impenetrable by the light of other wavelength, said optical filter being an interference filter having a maximum transmission in the order 9 at a wavelength of about 592 nm., and in the order 12 at a wave length of about 450 nm.
Claim 2
Independent Claim
135 words
A device for illuminating the travelling path of a vehicle and protecting the driver from dazzling by opposed sources of light, comprising at least one headlight having a source of light in the form of a linear irradiator whose light emission is mainly limited to certain spectral lines distributed over the visible range, and an optical filter adapted to the light emission of the linear irradiator and arranged between the travelling path of the vehicle and the driver thereof, said optical filter being penetrable by the light coming from said headlight and being impenetrable by the light of other wavelength, said optical filter being an interference filter having a maximum transmission in the order 9 at a wavelength of about 592 nm., and in the order 12 at a wave length of about 450 nm.
Claim 3
Dependent Claim
20 words
A device as defined in claim 1, wherein said source of light of the headlight is a gas discharge lamp.
Claim 4
Dependent Claim
20 words
A device as defined in claim 1, wherein said source of light of the headlight is a Hg vapor lamp.
Claim 5
Dependent Claim
41 words
A device as defined in claim 1, wherein said source of light of the headlight is a Hg vapor lamp containing an admixture of at least two metal halides irradiating light in at least two spectral lines in the visible range.
Claim 6
Dependent Claim
39 words
A device as defined in claim 1, wherein said source of light of the headlight is a Hg vapor lamp containing an admixture of at least two metal halides selected from the group consisting of InI, T1I and NaI.
Claim 7
Dependent Claim
24 words
A device as defined in claim 1, wherein said optical filter is in the form of spectacles adapted to be worn by the driver.
Claim 8
Dependent Claim
33 words
A device as defined in claim 1, wherein said optical filter is arranged in a position in front of the driver of the vehicle so as to be tilted out of the way.
Claim 9
Dependent Claim
61 words
A device as defined in claim 1, wherein said headlight has a polarizer for irradiating light with a certain condition of polarization and said optical filter is a polarization filter arranged in front of the position of the driver on the vehicle and penetrable by incident light having a polarization condition opposed to that of the light irradiated by the headlight.
Claim 10
Dependent Claim
22 words
A device as defined in claim 1, wherein said optical filter includes a polarization filter secured to a wind-screen of the vehicle.
Claim 11
Dependent Claim
21 words
A device as defined in claim 1, wherein said optical filter is an interference filter having two dielectric reflection layer systems.
Claim 12
Dependent Claim
34 words
A device as defined in claim 1, wherein said optical filter is an interference filter having two dielectric reflection layer systems each having a plurality of individual layers of different refractive indices and thicknesses.
Claim 13
Dependent Claim
56 words
A device as defined in claim 1, wherein said headlight is provided with means for forming bundles of light and said gas discharge lamp is arranged for vertically shifting movement relative to said light bundle forming means to permit said headlight to be switched over from a country beam to a traffic beam and vice versa.
Claim 14
Dependent Claim
44 words
A device as defined in claim 1, wherein said optical filter is an interference filter having an interference layer of a thickness proportional to cos phi /n with different angles of vision n representing the refractive index of the material of said interference layer.
Claim 15
Independent Claim
121 words
A system for illuminating the path of a vehicle, comprising: light-projecting means on said vehicle including a linear radiator for training a beam of light having three discrete spectral lines corresponding to different distinct colors spaced apart in the visible spectrum and providing a polychromatic illumination of said path similar to the effect of white light; and viewing filter means interposable between the eyes of the vehicle operator and said path and including a polychromatic line filter passing substantially Only said spectral lines while screening at least a major part of intercepted light elsewhere along the visible light spectrum whereby the vehicle operator is afforded correct recognition of objects along said path illuminated by said beam without substantial loss of contrast.
Claim 16
Independent Claim
121 words
A system for illuminating the path of a vehicle, comprising: light-projecting means on said vehicle including a linear radiator for training a beam of light having three discrete spectral lines corresponding to different distinct colors spaced apart in the visible spectrum and providing a polychromatic illumination of said path similar to the effect of white light; and viewing filter means interposable between the eyes of the vehicle operator and said path and including a polychromatic line filter passing substantially Only said spectral lines while screening at least a major part of intercepted light elsewhere along the visible light spectrum whereby the vehicle operator is afforded correct recognition of objects along said path illuminated by said beam without substantial loss of contrast.
Claim 17
Dependent Claim
28 words
The system defined in claim 14 wherein said linear radiator is a mercury vapor lamp containing at least three metal halides generating light of said three spectral lines.
Claim 18
Dependent Claim
19 words
The system defined in claim 15 wherein said mercury vapor lamp contains InI, T1I and NaI as said halides.
Claim 19
Dependent Claim
45 words
The system defined in claim 14 wherein said polychromatic line filter is an interference filter comprising two dielectric reflection layer systems each having a plurality of individual layers of different refractive indices and thicknesses, said interference filter having transmission wavelengths corresponding to said spectral lines.
Claim 20
Dependent Claim
56 words
The system defined in claim 14 wherein said polychromatic line filter is an interference filter having a maximum transmittance of the order of 9 at a wavelength of about 592 nm, of the order of 10 at a wavelength of about 535 nm and of the order of 12 at a wavelength of about 450 nm.
Claim 21
Dependent Claim
70 words
The system defined in claim 14 wherein said light-projecting means further includes polarizing means for imparting to said polychromatic illumination a given selected state of polarization; and said viewing filter means includes a polarization filter disposed to pass light substantially only of said given selected state of polarization from objects reflecting same and to reject substantially all light from oncoming vehicles provided with similar projecting means and with tungsten headlamps.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |