System and method for telecentric projection lenses

Details System and method for telecentric projection lenses System and method for telecentric projection lenses

2006-04-25

2006-04-25

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Telecentric system

Reexamination Certificate

active

07035017

ABSTRACT:
A projection lens system which includes a telecentric lens assembly. The lens may be used to form an image from a light source, including for example a resonant microcavity phosphororcathode ray tube, onto a screen or display, such as in a television or a projection device. In accordance with one embodiment, a planar cooling gap or cavity (which may or may not contain a cooling liquid) is included between the imaging surface and the matching planar surface of the field lens. The use of a planar gap alleviates any temperature differentials across the cooling liquid and the lens surfaces, as compared with alternate designs that may have a non-planar gap between the faceplate and the field lens, or that use liquid lenses.

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patent: 2004/0090600 (2004-05-01), Blei et al.
patent: WO 2080577 (2002-10-01), None

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