| 摘要 |
A system for projecting 2D images, providing a computerized representation of a first, dense, grid of spatial 3D coordinates which respectively correspond to a set of time-points evenly distributed along a time-dimension with constant time-discretization; deriving a dense 2D representation of an image, whose coordinate pairs respectively correspond to said set of time-points; d. Defining a sparse 2D grid of second coordinate pairs, spaced such that distances between any two adjacent coordinate pairs along a row of said sparse 2D grid are constant; and finding, coordinate pairs closest to the second sparser grid to yield a third grid, and a laser controller to control the laser to project a digitally represented image, from said distance, timed to project pixels whose locations respectively correspond to the subset of uniformly distanced positions forming said third grid, thereby to prevent image distortion despite non-uniformity of micro-mirror's angular velocity. |
| 主权项 |
1. A method for projecting n-dimensional images represented by pixels, where n does not exceed 2, onto an m-dimensional surface, using at least one laser which generates at least one coherent beam and is arranged to impinge upon at least one micro-mirror arranged for pivoting, at non-uniform angular velocity, about no more than two axes, so as to reflect the coherent beam sequentially over the entirety of said m-dimensional surface, the method comprising:
providing a computerized representation of a first, dense, grid of spatial 3D coordinates comprising a multiplicity of angular orientations of the mirror given a specific predefined operating modulating frequency of the laser; where the spatial 3D coordinates in space respectively correspond to a set of time-points that are evenly distributed along a time-dimension with constant time-discretization deltaT; deriving a dense grid representation of an image to be displayed on the m-dimensional surface, from said first, dense, grid of spatial 3D coordinates, where the coordinates respectively correspond to said set of time-points; defining a computerized representation of a sparse m-dimensional grid of second coordinates, which is sparser than said dense m-dimensional representation, wherein said second coordinates are spaced such that distances between any two adjacent coordinate sets along any row of said sparse m-dimensional grid are constant and the rows and the columns are aligned to resemble said image to be displayed on the m-dimensional surface; and finding, in said dense grid of first coordinates, the subset of coordinates that is closest to the said second sparser grid of coordinates, thereby to yield a third grid of m-dimensional spatial coordinates characterized in that if a laser is used to project a digitally represented image onto an m-dimensional surface, from a user-selected distance within the range of distances, and the laser operation is timed to project pixels whose locations respectively correspond to the said third grid, image distortion is prevented despite non-uniformity of said micro-mirror's angular velocity. |
