Customizable spectral profiles for filtering

• US 8,009,278 B2
• Filed: 12/29/2009
• Issued: 08/30/2011
• Est. Priority Date: 10/18/2002
• Status: Active Grant

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Dirk, Carl W.
• Primary Examiner(s): LAUCHMAN, LAYLA G
• Application Number:
  US12/648,714
• Publication Number:
  US 20100165337A1
• Time in Patent Office: 609 Days
• Field of Search: 356/72, 356/73, 356/303, 382/165, 382/164, 382/174, 702/40, 362/231
• US Class Current: 356/72
• CPC Class Codes: G01J 2003/1282 Spectrum tailoring
• CPC Class Codes: G01J 3/12 Generating the spectrum; Monochromators
• CPC Class Codes: G01J 3/14 using refracting elements, e.g. prisms G01J3/18, G01J3/26 take precedence prisms per se G02B5/04
• CPC Class Codes: G01J 3/28 Investigating the spectrum using colour filters G01J3/51
• CPC Class Codes: G01J 3/51 using colour filters
• CPC Class Codes: G01J 3/524 Calibration of colorimeters
• CPC Class Codes: G02B 27/0012 Optical design, e.g. procedures, algorithms, optimisation routines
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

Computer program products comprising tangible computer-readable media having instructions that are executable by a computer to generate a customized spectral profile, which can be used to generate a corresponding filter. The instructions can comprise: generating a trial source spectrum; determining an uncorrected lamp source spectrum; calculating one or more optical indices using the trial source spectrum or the uncorrected lamp source spectrum; and optimizing one or more of the optical indices by varying the trial source spectrum to generate the customized spectral profile.

Claims

1. A computer-program product, comprising:

tangible computer-readable media having instructions that are executable by a computer to generate a customized spectral profile, the instructions comprising;

generating a trial source spectrum;

determining an uncorrected lamp source spectrum;

calculating one or more optical indices using the trial source spectrum or the uncorrected lamp source spectrum; and

optimizing one or more of the optical indices by varying the trial source spectrum to generate the customized spectral profile.

2. The computer-program product of claim 1, where the instructions further comprise:

calculating a corrected lamp source spectrum using the uncorrected lamp source spectrum, and the optical indices being calculated using the trial source spectrum, the uncorrected lamp source spectrum, or the corrected lamp source spectrum.

3. The computer-program product of claim 1, where the optical indices comprise one or more of chromaticity, filter efficiency, lumens per watt efficiency, overall filter efficiency, watt reduction criteria, color rendering index, and modified color rendering index.

4. The computer-program product of claim 3, where one or more of the optical indices correspond to a specific object to be illuminated.

5. The computer-program product of claim 4, where the specific object comprises a work of art.

6. The computer-program product of claim 1, where optimizing comprises:

varying the trial source spectrum by changing one or more parameters of contributing functions of the trial source spectrum or changing individual values of the trial source spectrum at different wavelengths.

7. The computer-program product of claim 1, where the customized spectral profile comprises a spectral profile for protecting an object from photodamage.

8. The computer-program product of claim 7, where the spectral profile is configured to render only photometric light.

9. The computer-program product of claim 7, where the object comprising a work of art.

10. The computer-program product of claim 1, where the customized spectral profile comprises a spectral profile for aesthetically rendering an object.

11. The computer-program product of claim 10, where the spectral profile comprises a candlelight profile for rendering the object as if illuminated by candlelight.

12. The computer-program product of claim 10, where the spectral profile comprises a torchlight profile for rendering the object as if illuminated by torchlight.

13. The computer-program product of claim 10, where the spectral profile comprises a fluorescent profile for rendering the object as if illuminated by fluorescent lighting.

14. The computer-program product of claim 10, where the spectral profile comprises an incandescent profile for rendering the object as if illuminated by an incandescent light.

15. The computer-program product of claim 10, where the spectral profile comprises a halogen profile for rendering the object as if illuminated by halogen-based lighting.

16. The computer-program product of claim 10, where the spectral profile comprises an oil lamp profile for rendering the object as if illuminated by an oil lamp.

17. The computer-program product of claim 10, where the spectral profile comprises a daylight profile for rendering the object as if illuminated by sunlight.

18. The computer-program product of claim 10, where the spectral profile comprises a roomlight profile for rendering the object as if illuminated by sunlight or candlelight scattered in a room.

19. The computer-program product of claim 10, where the spectral profile comprises a gas light profile for rendering the object as if illuminated by a gas light.

20. The computer-program product of claim 10, where the spectral profile comprises a lime light profile for rendering the object as if illuminated by a lime light.

21. The computer-program product of claim 10, where the spectral profile comprises a mantle-light profile for rendering the object as if illuminated by a Welsbach mantle.

22. The computer-program product of claim 10, where the spectral profile comprises an emphasis profile for emphasizing one or more colors of the object.

23. The computer-program product of claim 1, where the customized spectral profile comprises a spectral profile for correcting the rendering an object.

24. The computer-program product of claim 23, where the spectral profile comprises a profile for correcting the rendering of the object for an eye experiencing loss of vision with respect to one or more colors.

25. A method for making an optical filter, comprising:

forming an optical filter having a customized spectral profile, the customized spectral profile generated by optimizing one or more optical indices by varying a trial source spectrum, the optical indices being calculated using a trial source spectrum or an uncorrected lamp source spectrum.

26. An apparatus comprising:

an optical filter having a customized spectral profile, the customized spectral profile being generated by optimizing one or more optical indices by varying a trial source spectrum, the optical indices being calculated using a trial source spectrum or an uncorrected lamp source spectrum.