Performance measurement system with quantum dots for object identification

• US 20050114073A1
• Filed: 12/01/2004
• Published: 05/26/2005
• Est. Priority Date: 12/05/2001
• Status: Active Grant

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Gobush, William
• Granted Patent: US 8,137,210 B2
• Time in Patent Office: Days
• US Class Current: 702/143
• CPC Class Codes: A63B 2024/0031 at the starting point
• CPC Class Codes: A63B 2024/0034 during flight
• CPC Class Codes: A63B 2024/0043 Systems for locating the point of impact on a specific surface
• CPC Class Codes: A63B 2102/32 Golf
• CPC Class Codes: A63B 2220/05 Image processing for measuring physical parameters
• CPC Class Codes: A63B 2220/13 Relative positions
• CPC Class Codes: A63B 2220/16 Angular positions
• CPC Class Codes: A63B 2220/20 Distances or displacements
• CPC Class Codes: A63B 2220/24 Angular displacement
• CPC Class Codes: A63B 2220/30 Speed
• CPC Class Codes: A63B 2220/35 Spin
• CPC Class Codes: A63B 2220/40 Acceleration
• CPC Class Codes: A63B 2220/803 Motion sensors
• CPC Class Codes: A63B 2220/805 Optical or opto-electronic sensors
• CPC Class Codes: A63B 2220/806 Video cameras
• CPC Class Codes: A63B 2220/807 Photo cameras
• CPC Class Codes: A63B 2220/808 Microphones
• CPC Class Codes: A63B 2225/20 with means for remote communication, e.g. internet or the like
• CPC Class Codes: A63B 2225/74 with powered illuminating means, e.g. lights
• CPC Class Codes: A63B 24/0003 Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
• CPC Class Codes: A63B 24/0006 : Computerised comparison for qualitative assessment of motion sequences or the course of a movement
• CPC Class Codes: A63B 24/0021 : Tracking a path or terminating locations
• CPC Class Codes: A63B 43/008 : with means for improving visibility, e.g. special markings or colours illuminating or reflecting means A63B43/06
• CPC Class Codes: A63B 60/42 : Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand
• CPC Class Codes: A63B 60/54 : with means for damping vibrations
• CPC Class Codes: A63B 69/3614 : using electro-magnetic, magnetic or ultrasonic radiation emitted, reflected or interrupted by the golf club
• CPC Class Codes: A63B 69/3623 : for driving A63B69/3608, A63B69/3658, A63B69/3661, A63B69/3667 and A63B69/3691 take precedence
• CPC Class Codes: A63B 69/3658 : Means associated with the ball for indicating or measuring, e.g. speed, direction
• CPC Class Codes: A63B 71/06 : Indicating or scoring devices for games or players , or for other sports activities
• CPC Class Codes: A63B 71/0622 : Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
• CPC Class Codes: G01P 3/38 : using photographic means
• CPC Class Codes: G01P 3/40 : using stroboscopic means

Abstract

The present invention is directed to a monitor system that measures flight characteristics of at least one object moving in a predetermined field-of-view using at least one fluorescent marker. In one embodiment, the emission spectra of the fluorescent marker is preferably narrow and substantially symmetric. It may be desirable for the fluorescent marker to be capable of responding to a broad excitation spectra. Preferably, the fluorescent markers comprise quantum dots. The quantum dots may be manufactured in any desired manner, and may comprise semiconductors, gold atoms, and the like.

Claims

1. A portable monitor system for measuring the kinematics of at least one object, comprising:

an imaging system capable of acquiring images of at least one high speed object; and

at least one fluorescent marker selectively positioned on the surface of the at least one object, wherein the at least one fluorescent marker is capable of emitting a substantially narrow emission spectrum.

2. The monitor system of claim 1, wherein the at least one fluorescent marker comprises quantum dots.

3. The monitor system of claim 1, wherein the fluorescent marker is capable of emitting a substantially symmetric emission spectrum.

4. The monitor system of claim 1, wherein the imaging system comprises a high speed shuttering system.

5. The monitor system of claim 4, wherein the high speed shuttering system is capable of opening and closing in less than about 50 μ

s.

6. The monitor system of claim 4, wherein the high speed shuttering system is capable of opening and closing in less than about 100 μ

s.

7. The monitor system of claim 1, wherein the at least one high speed object moves at between about 50 mph and about 250 mph.

8. The monitor system of claim 1, wherein the at least one high speed object moves at between about 100 mph and 200 mph.

9. The monitor system of claim 1, wherein the at least one high speed object moves at about 50 mph or greater.

10. The monitor system of claim 1, further comprising a light source.

14. The monitor system of claim 10, wherein the energy in a single burst of light is between about 0.25 joules and about 1.5 joules.

15. The monitor system of claim 1, wherein the imaging system comprises a filter.

16. The monitor system of claim 15, wherein the filter comprises a band-pass filter.

17. The monitor system of claim 1, wherein the substantially narrow emission spectrum comprises a Full-Width Half Maximum of less than about 50 nm.

18. The monitor system of claim 1, wherein the substantially narrow emission spectrum comprises a Full-Width Half Maximum of less than about 30 nm.

19. The monitor system of claim 2, wherein the fluorescence time of the quantum dots is about 200 ns or less.

20. The monitor system of claim 2, wherein the fluorescence time of the quantum dots is about 150 ns or less.

21. The monitor system of claim 2, wherein the emission spectrum of the quantum dots is varied based on the diameter of the quantum dots.

22. The monitor system of claim 2, wherein the quantum dots comprise semiconductors.

23. The monitor system of claim 2, wherein the quantum dots comprise gold atoms encapsulated in poly-amid amine dendrimers.

11. The monitor system of claim 11, wherein the distance between the light source and the at least one object is about 100 inches or less.

12. The monitor system of claim 11, wherein the distance between the light source and the at least one object is about 80 inches or less.

13. The monitor system of claim 11, wherein the distance between the light source and the at least one object is between about 20 inches and about 50 inches.

24. A portable monitor system for measuring the kinematics of at least one object, comprising:

a camera; and

at least one fluorescent marker selectively positioned on the surface of the at least one object, wherein the fluorescent marker is capable of emitting a substantially symmetric emission spectrum.

25. The monitor system of claim 24, wherein the camera comprises a camera capable of acquiring images of high speed objects in motion.

26. The monitor system of claim 25, wherein the high speed objects move between about 50 and about 250 mph.

27. The monitor system of claim 24, wherein the camera comprises a high speed shuttering system.

28. The monitor system of claim 24, wherein the at least one fluorescent marker comprises quantum dots.

29. The monitor system of claim 28, wherein the quantum dots comprise semiconductors.

30. The monitor system of claim 28, wherein the quantum dots comprise gold atoms encapsulated in poly-amid amine dendrimers.

31. The monitor system of claim 24, wherein the fluorescent marker emits a substantially narrow emission spectrum.

32. The monitor system of claim 28, wherein a first excitation wavelength is capable of exciting a plurality of quantum dots to emit different emission spectra.

33. The monitor system of claim 28, wherein the emission spectrum of the quantum dots is based on the diameter of the quantum dots.

34. The monitor system of claim 33, wherein the diameter of the quantum dots is between about 0 nm and about 10 nm.

35. The monitor system of claim 33, wherein the diameter of the quantum dots is about 15 nm or less.

36. The monitor system of claim 28, wherein the emission spectra of the quantum dots is within the infrared spectrum.

37. The monitor system of claim 29, wherein the semiconductors comprise one of cadmium selenide, cadmium sulfide, zinc selenide, zinc sulfide, and lead selenide.

38. The monitor system of claim 31, wherein the substantially narrow emission spectrum comprises a Full-Width Half Maximum of less than about 50 nm.

39. The monitor system of claim 31, wherein the substantially narrow emission spectrum comprises a Full-Width Half Maximum of less than about 30 nm.

40. A method of measuring the kinematics of at least one object comprising:

providing at least one object including at least one fluorescent marker thereon; and

acquiring one or more images of the at least one object in motion based on the at least one fluorescent marker;

wherein the acquiring is based on a substantially narrow emission spectra emitted by the at least one fluorescent marker.

41. The method of claim 40, wherein the acquiring is based on a substantially symmetrical emission spectra emitted by the at least one fluorescent marker.

42. The method of claim 40, wherein the acquiring comprises filtering received wavelengths to allow only the substantially narrow emission spectra to pass.

43. The method of claim 42, wherein the filtering comprises band-pass filtering.

44. The method of claim 42, wherein the at least one fluorescent marker comprises a quantum dot.

45. The method of claim 44, wherein the at least one quantum dot comprises a semiconductor.

46. The method of claim 44, wherein the at least one quantum dot comprises gold atoms.

47. The method of claim 46, wherein the gold atoms are encapsulated in poly-amid amine dendrimers.

48. The method of claim 40, wherein the object in motion is moving between about 50 mph and about 250 mph.