Projection lens and display device for multimedia and other...

Details Projection lens and display device for multimedia and other... Projection lens and display device for multimedia and other...

2007-02-06

2007-02-06

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S754000, C359S642000

Reexamination Certificate

active

11276106

ABSTRACT:
A wide angle projection lens includes, in sequential order from an image side, a first lens group of negative refractive power, the first lens group having at least one aspheric surface, a second lens group, and a third lens group of positive refractive power. For the wide angle projection lens, the following Conditions (1) to (4) are satisfied: |F1/F|≧4.5 (Condition (1)); 2.5≦|F2/F|≦6.0 (Condition (2)); 3.8≦|F3/F|≦5.0 (Condition (3)); and 0.8≦BFL/F≦1.4 (Condition (4)). An optical engine, including the wide angle projection lens, can be implemented in a projection display device.

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Product Brochure, “Display Technologies by Carl Zeiss”, Carl Zeiss Jena GmbH, Jena, Germany, date unknown.

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