BACKGROUND

Various techniques can be used for obtaining the three dimensional (3D) topography of an object. Information regarding 3D topography of a surface can be used to image a plethora of objects and surfaces. For example, 3D topography data can be used for a host of applications including applications in dental imaging and restoration. In some instances, 3D imaging methodologies can be used for imaging an oral cavity of a patient. With the additional use of computer-assisted design (CAD) or computer-assisted manufacture (CAM) methods, tooth replacements can be designed and manufactured without having to make any cast impressions of a patient's teeth. Imaging systems can, e.g., include an optical probe coupled to a detector and a processor for generating a suitable image to allow for design and fabrication of a desired product (e.g., a physical model and/or prosthesis).

Associating color information with three-dimensional objects is not straightforward, particularly when the position information is obtained by using a three dimensional scanning method and the color information is obtained using a two dimensional scanning method. The problem of conformally mapping the two dimensional color information onto the three dimensional surface model is difficult and it is common for mismatching of the color with three-dimensional points to occur. For example, it can be difficult to accurately associate color information from the detectors with the correct points on the three dimensional surface model, particularly if relative movement between the object and the device occurs between the acquisition of the three-dimensional topological data and acquisition of the two-dimensional image data.

Thus, there is a need for improved methods and systems for generating color images, e.g., focused color images, of an object, such as a patient's dentition.

SUMMARY

Systems, methods, and devices for generating color images of an object are provided. For example, in many embodiments, the systems, methods, and devices generate focused two-dimensional (2D) color images of an object (e.g., a patient's dentition) in combination with three-dimensional (3D) topography data of the object. The multi-focal color image generation disclosed herein provides enhanced color acquisition relative to single focal color image generation. Additionally, the systems, methods, and devices disclosed herein can be used to concurrently acquire in-focus color images and corresponding 3D topography data.

In some aspects, methods are provided for generating a focused color image of an object. The methods can include illuminating the object with a light source, wherein a first wavelength of light and a second wavelength of light from the light source are focused in a first focal plane and a second focal plane. A detector can be used to collect first image data of the illuminated object at a first time point. The first image data can correspond to the first wavelength of light reflected from the object at the first focal plane. The same or a different detector can also be used to collect second image data of the illuminated object at a second time point. The second image data can correspond to the second wavelength of light reflected from the object at the second focal plane. The first and second image data can then be combined to generate the focused color image of the object. Related methods, systems and devices are also provided.

Other objects and features of the present invention will become apparent by a review of the specification, claims and appended figures.

INCORPORATION BY REFERENCE

All publications, patents, and patent applications mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent, or patent application was specifically and individually indicated to be incorporated by reference.

