Technology
Enhancing the contrast ratio based upon the structure of the technology is a problem for current schlieren optics projectors. In this new patent, the contract ratio is dramatically improved by simply using a different optical system which is transmissive rather than reflective. This patent employs color selection by diffraction.
Prior approaches in constructing projectors describe a solid state light modulator (a spot light source), which employs a reflective patterned alignment modulator in a projector having a schlieren optical system. There is a serious drawback to producing a high contrast ratio. To produce a very high contrast ratio with a schlieren lens it needs to have an extremely good non-reflective coating, which is hard to achieve.
The novel method being used in this new approach uses transmissive schlieren optics. The contrast ratio can only be slightly reduced since it takes two reflections in sequence from lens surfaces to reduce contrast. In accordance with one more aspect of the present invention, instead of employing the usual schlieren lens in a projector, there is a reflective modulator (a focusing reflector), such as a parabolic reflector. In this approach, there is a dramatic improvement in contrast since the focusing is produced by reflection.
Applications
The ability to produce an improved line of projectors that can be used for applications such as:
- Education
- Corporate offices and presentations
- Personal usage and home theaters
- Digital theatre projectors
- Other commercial usages
Advantages
A simple and cost efficient solution to developing a new line of high contrast projectors. The development is cost efficient because new technology does not need to be created for this invention to function.
