Apparatus and method for measuring optical characteristics of an object or material

• US 20030038938A1
• Filed: 06/20/2002
• Published: 02/27/2003
• Est. Priority Date: 06/20/2002
• Status: Abandoned Application

• Current Assignee: JJL Technologies, L.L.C.
• Original Assignee: JJL Technologies, L.L.C.
• Inventors: Jung, Russell W., Loudermilk, Alan R., Jung, Wayne D.
• Application Number:
  US10/168,696
• Publication Number:
  US 20030038938A1
• Time in Patent Office: Days
• US Class Current: 356/419
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0251 Colorimeters making use of an integrating sphere
• CPC Class Codes: G01J 3/28 Investigating the spectrum using colour filters G01J3/51
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors
• CPC Class Codes: G01J 3/51 using colour filters
• CPC Class Codes: G01J 3/513 having fixed filter-detector pairs

Abstract

Low cost and form factor spectrometers are disclosed. A spectrometer comprises a substrate, a plurality of optical sensors (979), a plurality of spectral filters (977), an optical manifold (976) and one or more processing elements (980). The plurality of spectral filters (977) and the one or more processing elements (980) are mounted on the substrate. The spectral filters (977) are fixedly positioned over at least a group of the optical sensors (979) and fixedly positioned with respect to the substrate. An optical manifold (976) is fixedly positioned over the spectral filters (977). The optical manifold (976) has a plurality of exit ports and an entrance port, wherein light entering the entrance port is transmitted to an interior portion of the optical manifold (976) and a portion of the light is transmitted from the exit ports through some of the spectral filters (977). The spectrometers are disclosed embedded in printing and scanning devices, computer companion devices, scope-type devices and the like.

Claims

1. A system for applying pigment to a substrate, comprising:

a spectrophotometer integral to the system supplying light to the substrate and receiving light from the substrate, wherein the light received from the substrate is spectrally analyzed by a spectrometer;

one or more pigment dischargers integral to the system, wherein the one or more pigment dischargers apply one or more pigments to the substrate;

wherein, the spectrometer spectrally analyzes the one or more pigments applied to the substrate.

2. The system of claim 1, wherein the spectrometer comprises:

an optical sensing circuit having thereon a plurality of optical sensors and one or more processing elements;

a plurality of filters fixedly positioned over at least a first group of the optical sensors fixedly and fixedly positioned with respect to the substrate, wherein the plurality of filters have spectral transmission characteristics over a predetermined spectrum;

an optical manifold fixedly positioned over at least certain of the plurality of filters and fixedly positioned with respect to the substrate, wherein the optical manifold has a plurality of exit windows and at least one entrance port, wherein light entering the entrance port is transmitted to an interior portion of the optical manifold, wherein at least a portion of the light is transmitted from the exit ports through at least certain of the filters for sensors by at least certain of the optical sensors;

wherein light may be coupled to the entrance port, wherein at least first spectral data corresponding to the light is generated by the one or more processing elements, wherein the spectrometer assembly is fabricate in a unitary manner on the substrate.

3. The system of claim 1, wherein the pigment dischargers operate responsive to data from the spectrometer.

4. The system of claim 3, wherein the pigment discharges are controlled responsive to the spectrum analysis of the one or more pigments applied to the substrate.

5. (amended) An integrated, unitary spectrometer assembly, comprising:

a substrate having thereon a plurality of optical sensors and one or more processing elements;

a plurality of filter[s] elements fixedly positioned over at least a first group of the optical sensors fixedly and fixedly positioned with respect to the substrate, wherein the plurality of filter[s] elements provide filters that have spectral transmission characteristics over a predetermined spectrum;

an optical manifold comprising at least a fiber optic bundle having at least one input and a plurality of outputs fixedly positioned over at least certain of the plurality of filters and fixedly positioned with respect to the substrate, [wherein the optical manifold has a plurality of exit windows and at least one entrance port,] wherein light entering the [entrance port] input is transmitted to an interior portion of the optical manifold, wherein at least a portion of the light is transmitted from the [exit ports] outputs through at least certain of tile filters for sensors by at least certain of the optical sensors;

wherein light may be coupled to the [entrance port] input, wherein at least first spectral data corresponding to the light is generated by the one or more processing elements, wherein the spectrometer assembly is fabricated in a unitary manner on the substrate.

6. The assembly of claim 5, wherein the sensors comprise sensors that generate at least one signal having a frequency proportional to the light intensity received by the one or more sensors.

7. The assembly of claim 6, wherein the at least one signal comprises a digital signal.

8. The assembly of claim 7, wherein the digital signal comprises a TTL or CMOS digital signal.

9. The assembly of claim 6, wherein one or more spectral characteristics are determined based on measuring a period of a plurality of digital signals produced by a plurality of sensors.

10. The assembly of claim 6, wherein the signal comprises an asynchronous signal of a frequency dependent upon the intensity of the received light.

11. The assembly of claim 6, wherein the one or more sensors comprise a plurality of light to frequency converter sensing elements.

12. The assembly of claim 6, wherein the filter elements comprises a plurality of filter portions having a wavelength dependent optical transmission property.

13. The assembly of claim 6, wherein a spectral analysis performed based on light received from an object or material.

14. The assembly of claim 6, wherein the filter elements comprises a plurality of cut-off filter elements.

15. The assembly of claim 6, wherein the filter elements collectively comprise a color gradient filter.

16. The assembly of claim 6, wherein the filter elements collectively comprises a filter grid.

17. The assembly of claim 6, wherein received light is spectrally analyzed without using a diffraction grating.

18. The assembly of claim 6, wherein the light is received by a probe, wherein a plurality of measurements are taken at a plurality of distances of the probe with respect to the object or material.

19. The assembly of claim 6, wherein a probe having one or more light sources provides light to an object or material, wherein light from one or more light sources is received by the one or more light receivers from the object or material.

20. The assembly of claim 19, wherein one or more sensors determine a distance of the probe with respect to the object or material.

21. The assembly of claim 19, wherein one or more sensors determine an angle of the probe with respect to the object or material.

22. The assembly of claim 19, wherein one or more sensors determine a distance and an angle of the probe with respect to the object or material.

23. The assembly of claim 6, wherein the at least one signal having a frequency proportional to the light intensity received by the one or more sensors is generated by an integrator coupled to the one or more sensors.

24. The assembly of claim 6, wherein the sensors comprise a photo diode array.

25. An integrated, unitary spectrometer assembly, comprising:

a substrate having thereon a plurality of optical sensors and one or more processing elements;

a plurality of filter[s] elements fixedly positioned over at least a first group of the optical sensors fixedly and fixedly positioned with respect to the substrate, wherein the plurality of filter[s] elements provide filters that have spectral transmission characteristics over a predetermined spectrum;

an optical manifold fixedly positioned over at least certain of the plurality of filters and fixedly positioned with respect to the substrate wherein the optical manifold has a plurality of exit windows and at least one entrance port, wherein light entering the entrance port is transmitted to an interior portion of the optical manifold, wherein at least a portion of the light is transmitted from the exit ports through at least certain of the filters for sensors by at least certain of the optical sensors;

wherein light may be coupled to the entrance port, wherein at least first spectral data corresponding to the light is generated by the one or more processing elements, wherein the spectrometer assembly is fabricate in a unitary manner on the substrate.

26. The assembly of claim 25, wherein the sensors comprise sensors that generate at least one signal having a frequency proportional to the light intensity received by the one or more sensors.

27. The assembly of claim 26, wherein the at least one signal comprises a digital signal.

28. The assembly of claim 27, wherein the digital signal comprises a TTL or CMOS digital signal.

29. The assembly of claim 26, wherein one or more spectral characteristics are determined based on measuring a period of a plurality of digital signals produced by a plurality of sensors.

30. The assembly of claim 26, wherein the signal comprises an asynchronous signal of a frequency dependent upon the intensity of the received light.

31. The assembly of claim 26, wherein the one or more sensors comprise a plurality of light to frequency converter sensing elements.

32. The assembly of claim 26, wherein the filter elements comprises a plurality of filter portions having a wavelength dependent optical transmission property.

33. The assembly of claim 26, wherein a spectral analysis is performed based on light received from an object or material.

34. The assembly of claim 26, wherein the filter elements comprises a plurality of cut-off filter elements.

35. The assembly of claim 26, wherein the filter elements collectively comprise a color gradient filter.

36. The assembly of claim 26, wherein the filter elements collectively comprises a filter grid.

37. The assembly of claim 26, wherein received light is spectrally analyzed without using a diffraction grating.

38. The assembly of claim 26, wherein the light is received by a probe, wherein a plurality of measurements are taken at a plurality of distances of the probe with respect to the object or material.

39. The assembly of claim 26, wherein a probe having one or more light sources provides light to an object or material, wherein light from one or more light sources is received by the one or more light receivers from the object or material.

40. The assembly of claim 39, wherein one or more sensors determine a distance of the probe with respect to the object or material.

41. The assembly of claim 39, wherein one or more sensors determine an angle of the probe with respect to the object or material.

42. The assembly of claim 39, wherein one or more sensors determine a distance and an angle of the probe with respect to the object or material.

43. The assembly of claim 26, wherein the at least one signal having a frequency proportional to the light intensity received by the one or more sensors is generated by an integrator coupled to the one or more sensors.

44. The assembly of claim 26, wherein the sensors comprise a photo diode array.

45. A method for determining encoded data comprising the steps of:

receiving light with at least one receiver, wherein light from the receiver is coupled to a system for measuring an intensity of the received light in a plurality of spectral bands;

comparing the measured intensities in each of the spectral bands to a reference intensity value;

determining more than one bit of encoded data for each of the spectral bands; and

determining the encoded data based on the more than one bit of encoded data for each of the spectral bands.

46. The method of claim 45, wherein the light is received from an object or material on which pigments have been applied, wherein the data is encoded in the applied pigments.

47. The method of claim 46, wherein the system for measuring an intensity is moved past a plurality of areas, wherein encoded data is determined from the plurality of areas as the system is moved past the areas.

48. The method of claim 47, wherein the system is moved past the areas in a raster scan pattern.

49. The method of claim 45, wherein the light is received from a source of light, wherein the source of light emits light based on the encoded data.

50. The method of claim 49, wherein the light is received from a light transmission element that receives light from the source of light.

51. A computing system, comprising:

a computing system having a display and/or an output device, wherein the display displays color information and the output device produces an output that includes color information;

a miniature spectrometer device coupled to the computing system, wherein the miniature spectrometer receives light from the display or the output from the output device;

a processor and software integral to the computing system, wherein the processor and software operate responsive to data from the miniature spectrometer device, wherein the color information displayed on the display and/or the color information included in, the output from the output device is responsive to the data from the miniature spectrometer device.

52. A scope system for sighting an object, comprising:

a scope, wherein the scope receives light from a field of view, wherein the field of view includes the object;

coupling light from the scope to a miniature spectrometer integral to the scope system, wherein the miniature spectrometer measures spectral properties of light from the scope, wherein spectral properties of the object are measured;

determining a characteristic of the object based on the measured spectral properties.

53. A system for producing one or more objects, comprising:

an output device coupled to a network, wherein the output device produces an object containing color information, wherein the output device includes a miniature spectrometer for measuring color information contained in the object produced by the output device; and

a remote computing system coupled to the network, wherein data are communicated between the remote computing system and the output device;

wherein the output device produces an object containing color information, wherein the color information contained in the object in determined responsive to data from the remote computing system.

54. The system of claim 53, wherein a plurality of output devices are coupled to the network, wherein the remote computing system controls the plurality of output devices.