Miniaturized system and method for measuring optical characteristics

• US 8,373,857 B2
• Filed: 03/21/2012
• Issued: 02/12/2013
• Est. Priority Date: 02/21/2002
• Status: Active Grant

• Current Assignee: Vita Zahnfabrik H. Rauter GMBH & Co.. KG (Rauter Beteiligungsgesellschaft mbH)
• Original Assignee: Vita Zahnfabrik H. Rauter GMBH & Co.. KG (Rauter Beteiligungsgesellschaft mbH)
• Inventors: Jung, Wayne D., Jung, Russell W., Sloan, Walter W., Loudermilk, Alan R.
• Primary Examiner(s): LAUCHMAN, LAYLA G
• Application Number:
  US13/425,852
• Publication Number:
  US 20120179406A1
• Time in Patent Office: 328 Days
• Field of Search: 356/73, 356/326, 356/328, 356402-407, 356/417, 356/419
• US Class Current: 356/326
• CPC Class Codes: A61C 19/04 Measuring instruments specially adapted for dentistry A61C5/44 takes precedence; testing vitality of teeth A61B5/0534; radiation diagnosis specially adapted for dentistry A61B6/51
• CPC Class Codes: G01J 1/0271 Housings; Attachments or accessories for photometers
• CPC Class Codes: G01J 2003/466 Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0256 Compact construction
• CPC Class Codes: G01J 3/0264 Electrical interface; User interface
• CPC Class Codes: G01J 3/0272 Handheld
• CPC Class Codes: G01J 3/0278 Control or determination of height or angle information for sensors or receivers
• CPC Class Codes: G01J 3/0291 Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
• CPC Class Codes: G01J 3/0294 Multi-channel spectroscopy
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors
• CPC Class Codes: G01J 3/46 Measurement of colour; Colour measuring devices, e.g. colorimeters measuring colour temperature G01J5/60
• CPC Class Codes: G01J 3/462 Computing operations in or between colour spaces; Colour management systems
• CPC Class Codes: G01J 3/463 Colour matching
• CPC Class Codes: G01J 3/508 measuring the colour of teeth
• CPC Class Codes: G01J 3/51 using colour filters
• CPC Class Codes: G01J 3/513 having fixed filter-detector pairs
• CPC Class Codes: G01J 3/524 Calibration of colorimeters
• CPC Class Codes: G01N 21/25 Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• CPC Class Codes: G01N 21/57 : Measuring gloss

Abstract

A miniaturized spectrometer/spectrophotometer system and methods are disclosed. A probe tip including one or more light sources and a plurality of light receivers is provided. A first spectrometer system receives light from a first set of the plurality of light receivers. A second spectrometer system receives light from a second set of the plurality of light receivers. A processor, wherein the processor receives data generated by the first spectrometer system and the second spectrometer system, wherein an optical measurement of a sample under test is produced based on the data generated by the first and second spectrometer systems.

Claims

1. A system for determining optical properties of a dental object, comprising;

a calibration block of known optical characteristics;

a probe tip including a barrier applied thereto to capture the optical characteristics of the dental object and the calibration block;

a spectrometer assembly receiving light from the probe tip with the barrier applied thereto, wherein the spectrometer assembly generates data of a first average optical depth based on light received by a first light receiver and generates data of a second average optical depth based on light received by a second light receiver, wherein the second average optical depth is different from the first average optical depth; and

a computer to calibrate the optical characteristics of the dental object measured by the probe having the applied barrier, in the form of a closest match or matches to one or more of stored shade guide values.

2. The system of claim 1, further comprising:

a transmission medium for transmitting the calibrated optical characteristics data to a remote location; and

a second computer at the remote location for receiving the calibrated optical characteristics data to be used for producing a second dental object based on the calibrated optical characteristics data.

3. The system of claim 1, further comprising a database for storing the calibrated optical characteristics data in a data record associated with a particular patient.

4. The system of claim 1, further comprising a cradle for accepting the probe, wherein the first computer is configured to start calibrating the captured optical characteristics of the dental object when the probe is positioned inside the cradle.

5. The system of claim 1, further comprising a guide portion to guide the tip of the probe to land in a center portion of the calibration block to start calibrating.

6. The system of claim 1, wherein the calibration block is made of a translucent or semi-transparent material.

7. The system of claim 1, wherein the optical characteristics include color information comprising value, chroma and hue information.

8. The system of claim 1, further comprising a body integral with the probe tip and encompassing the spectrometer assembly and adapted for positioning in a hand of an operator, wherein the hand of the operator substantially encompasses a bulk portion of the spectrometer assembly.

9. The system of claim 8, wherein the body includes a portion proximate to the probe tip, wherein a measurement of the dental object is initiated by activation of a switch in the portion proximate to the probe tip.

10. The system of claim 9, wherein the body and the switch are adapted for activation by an index finger of the operator.

11. The system of claim 8, wherein the body includes a switch on an underside portion of the body, wherein said capturing of the optical characteristics of the dental object is initiated by activation of the switch via a finger of the operator not including an index finger of the operator.