Method and apparatus for creating images of fibrous structures
View Patent ↗Apparatus and method for rendering an image of a fibrous material. The method includes providing parametric fibrous material optical properties derived from actual material fiber samples via the apparatus; providing a parametric virtual light environment; providing a virtual fibrous material array; and rendering an image of the virtual fibrous material array according to the interaction of the parametric fibrous material properties and the parametric virtual light environment.
1. An apparatus for determining material optical properties, the apparatus comprising:
a. a material holder comprising a curvilinear surface;
b. a collimated light source disposed in alignment with a surface normal of the curvilinear surface, to illuminate the material holder, wherein the collimated light source has an output; and
c. an image capture element aligned with the collimated light source and the surface normal of the curvilinear surface of the material holder;
wherein an angular offset between an axis of the collimated light source and an axis of the image capture element, each in a plane of the surface normal of the curvilinear surface of the material holder, is less than about 5 degrees; and
wherein a surface mirror and a half silvered mirror are disposed to bring the output of the collimated light source into alignment with the axis of the image capture element and to illuminate an image capture surface.
2. The apparatus according to claim 1 wherein the material holder further comprises a fiber separator.
3. The apparatus according to claim 1 wherein the angular offset is less than about 3 degrees.
4. The apparatus according to claim 1 wherein the collimated light source is aligned within about 0.2 degrees of the surface normal of the curvilinear surface of the material holder.
5. The apparatus according to claim 1 wherein the image capture element is aligned within about 0.2 degrees of the surface normal of the curvilinear surface of the material holder.
6. The apparatus according to claim 1 wherein at least one of the axis of the collimated light source and the axis of the image capture element is aligned to within about 2.5 degree to an axis normal to the curvilinear surface of the material holder.