Superposition method using a pair of stereo-isomeric micro...

Details Superposition method using a pair of stereo-isomeric micro... Superposition method using a pair of stereo-isomeric micro...

2010-08-02

2011-12-27

Mack, Ricky (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S291000, C359S292000

Reexamination Certificate

active

08085462

ABSTRACT:
DMDs (digital mirror devices) as currently produced by Texas Instruments show handedness with regard to mirror deflection axes and image raster. At present only one isomer (one hand-type) is produced, which we call the (L)DMD. For the superposition of (L)DMDs an additional folding is required in all arrangements of the state of the art, which results in sophisticated and expensive designs, e.g. the trichroic prism assembly (TPA) of 3-chip DMD-projectors. We uncover a superposition method using a pair of stereo-isomeric MEMSs (both the right-handed and the left-handed stereo-isomeric topologies are used). This eliminates the necessity of this previously required additional folding. As a consequence simplified and improved superposition systems can be designed. Minimal back focal length and symmetric designs lead to smaller size, lighter weight and reduced cost.

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