Zweiquellenbeleuchtungssystem

摘要

The DMD (deformable micromirror device) has a planar array reflective deflection elements, and an axis normal to the plane of the array. The elements are deflectable to a first position in response to a first drive voltage, being deflectable to a second position in response to a second drive voltage. A voltage drive causes the elements to cycle periodically between the two positions. A first illumination source in a first off-axis position illuminator the DMD when the elements are in the first position. A second illumination source in a second off-axis position illuminates the DMD when the elements are in the second position. Alternately the sources are illuminated synchronously with the drive so that the first source is on when the elements are in the first position and the second source is on when the elements are in the second position. Illumination reflected from the DMD is a combination of illumination from both sources.