Vehicular warning light with two or more dichroic elements

• US 6,582,112 B2
• Filed: 09/05/2002
• Issued: 06/24/2003
• Est. Priority Date: 11/02/1998
• Status: Expired due to Fees

• Current Assignee: Code 3 Incorporated (Halliburton Company)
• Original Assignee: Code 3 Incorporated (Halliburton Company)
• Inventors: Stein, Paul L., Kreutzer, Robert E., Dohogne, Dennis A.
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): WARD, JOHN A
• Application Number:
  US10/235,273
• Publication Number:
  US 20030012032A1
• Time in Patent Office: 292 Days
• Field of Search: 362/293, 362/493, 362/510, 362/540, 362/542, 340/463, 340/468, 340/470, 340/471, 340/472, 359/630, 359/634, 315/77, 116/46, 116/48, 116/49, 116/51, 116/54
• US Class Current: 362/542
• CPC Class Codes: B60Q 1/2611 Indicating devices mounted on the roof of the vehicle
• CPC Class Codes: F21S 43/255 Filters
• CPC Class Codes: F21S 43/27 Attachment thereof
• CPC Class Codes: F21S 43/31 Optical layout thereof
• CPC Class Codes: F21S 43/37 Attachment thereof
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21V 9/20 Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
• CPC Class Codes: F21W 2107/10 for land vehicles
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00

Abstract

A visible light source adapted to be mounted on the vehicle for generating visible light to be used to create warning signals which are viewed by observers remote from the vehicle. A dichroic element adapted to be mounted on the vehicle and adjacent to the visible light source transmits at least some of the visible light generated by the light source and reflects at least some of the visible light generated by the light source. The transmitted and reflected light provides warning light signals within different wavelength ranges when viewed by an observer remote from the vehicle.

Claims

1. A light for a vehicle comprising:

a visible light source adapted to be mounted on the vehicle for generating visible light creating warning signals which are viewed by observers remote from the vehicle;

a first dichroic element adapted to be mounted on the vehicle adjacent to the visible light source, said first dichroic element reflecting at least some of the visible light generated by the light source;

the light reflected by the first element adapted to provide a first warning light signal within a first wavelength range when viewed by an observer remote from the vehicle;

a second dichroic element adapted to be mounted on the vehicle adjacent to the visible light source, said second dichroic element reflecting at least some of the visible light generated by the light source; and

the light reflected by the second element adapted to provide a second warning light signal within a second wavelength range when viewed by an observer remote from the vehicle.

2. The light of claim 1 wherein the dichroic element comprises a reflective filter.

3. The light of claim 1 further comprising a beam forming reflector having a focal point coincident with the visible light source such that the reflector reflects a beam of light, said first and second dichroic elements each positioned to intersect at least a portion of the beam of light.

4. The light of claim 3 further comprising first and second mirrors positioned to reflect the first and second warning light signals, respectively.

5. The light of claim 4 wherein the beam of light is projected in a direction which is substantially vertically upward and wherein the first and second mirrors are positioned to reflect the first and second warning light signals in a direction which is substantially horizontal and away from each other.

6. The light of claim 5 wherein the beam forming reflector comprises a beam forming trough, wherein the light source comprises a linear source and wherein the light bar is located on a light bar mounted on the vehicle.

7. The light of claim 1 further comprising a beam forming reflector having a focal point coincident with the visible light source such that the reflector reflects a beam of light which is at least partially intersected by the first element, and further comprising a sleeve at least partially surrounding the light source, said sleeve having a first portion reflecting light toward the beam forming reflector.

8. The light of claim 7 further comprising a second beam forming reflector having a focal point coincident with the visible light source such that the second reflector reflects a beam of light which is at least partially intersected by the second element, and wherein said sleeve has a second portion reflecting light toward the second beam forming reflector.

9. The light of claim 1 further comprising a beam forming reflector having a focal point coincident with the visible light source such that the reflector reflects a beam of light which is at least partially intersected by the first element, and further comprising a coating on the light source, said coating having a first portion reflecting light toward the beam forming reflector.

10. The light of claim 9 further comprising a second beam forming reflector having a focal point coincident with the visible light source such that the second reflector reflects a beam of light which is at least partially intersected by the second element, and wherein said coating has a second portion reflecting light toward the second beam forming reflector.

11. The light of claim 1 wherein the first dichroic element is a first coating on the light source and wherein the second dichroic element is a second coating on the light source.

12. The light of claim 1 wherein the first dichroic element and the second dichroic element form a sleeve at least partially surrounding the light source.

13. A light for a vehicle comprising:

a visible light source adapted to be mounted on the vehicle for generating visible light creating warning signals which are viewed by observers remote from the vehicle; and

a first dichroic element adapted to be mounted on the vehicle and adjacent to the visible light source to transmit at least some of the visible light generated by the light source and to reflect at least some of the visible light generated by the light source, wherein the reflected light provides a first warning light signal within a first wavelength range when viewed by an observer remote from the vehicle; and

a second dichroic element adapted to be mounted on the vehicle and adjacent to the visible light source to transmit at least some of the visible light transmitted by the first dichroic element to provide a second warning signal within a second wavelength range different than the first wavelength range when viewed by an observer remote from the vehicle, wherein said second dichroic element reflects at least some of the visible light transmitted by the first dichroic element to provide a third warning signal within a third wavelength range different than the first and second wavelength ranges when viewed by an observer remote from the vehicle.

14. The light of claim 13 wherein the first dichroic element comprises a first reflective filter and wherein the second dichroic element comprises a second reflective filter.

15. A light for a vehicle comprising:

a visible light source adapted to be mounted on the vehicle for generating visible light creating warning signals which are viewed by observers remote from the vehicle; and

a first dichroic element adapted to be mounted on the vehicle and adjacent to the visible light source to transmit at least some of the visible light generated by the light source and to reflect at least some of the visible light generated by the light source, wherein the reflected light provides a first warning light signal within a first wavelength range when viewed by an observer remote from the vehicle; and

a second dichroic element adapted to be mounted on the vehicle and adjacent to the visible light source to transmit at least some of the visible light reflected by the first dichroic element to provide a second warning signal within a second wavelength range different than the first wavelength range when viewed by an observer remote from the vehicle, wherein said second dichroic element reflects at least some of the visible light reflected by the first dichroic element to provide a third warning signal within a third wavelength range different than the first and second wavelength ranges when viewed by an observer remote from the vehicle.

16. The light of claim 15 wherein the first dichroic element comprises a first reflective filter and wherein the second dichroic element comprises a second reflective filter.

17. A method of making a warning light having a substrate with a dichroic coating thereon and having a light source, said warning light for generating a visual warning signal including light having a particular wavelength range, said method comprising the steps of:

selecting a light source which emits light within the particular wavelength range;

selecting a dichroic coating which transmits or reflects light within the particular wavelength range;

positioning the substrate to intersect light emitted by the light source such that the intersected light is transmitted or reflected by the dichroic coating; and

forming the warning signal from the intersected light.

18. The method of claim 17 wherein the dichroic coating comprises a reflective, filtering coating.

19. A method of making a warning light having a substrate with a dichroic coating thereon and having a light source, said warning light for generating a visual warning signal including light having a particular wavelength range, said method comprising the steps of:

selecting a dichroic coating which reflects light within the particular wavelength range;

positioning the substrate to intersect light emitted by the light source such that the intersected light is reflected by the dichroic coating; and

forming the warning signal from the reflected light.

20. The method of claim 19 wherein the dichroic coating comprises a reflective, filtering coating.