Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1999-02-27
2000-10-24
Mack, Ricky
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, G02B 2714
Patent
active
061376361
ABSTRACT:
The invention improves on an ocular having at least one spatially modulating, reflective device at one of the possible locations of an intermediate image plane. Emphasis is on the ocular containing the reflective device, rather than that device's function. A list of device functions include nonlinear image light modulation; optical power limiting; planar image processing; reticle, grid or text superposition. All such functions require sharp image focus on the device surface plane. A polarizing beamsplitter, quarter-wave plate means, field lens and roof prism are combined to simultaneously improve optical energy efficiency, sharpen focus and reduce keystoning at the reflective device while increasing the field-of-view for the virtual image of observed scenery. The basic design is complementary to economy of space: Unity-magnification and undeviated line-of-sight use is facilitated for applications such as driving or sighting; its design is also adaptable to binoculars and applications in microscopy and telescopy.
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