Broad band objective having improved lateral color performance

Details Broad band objective having improved lateral color performance Broad band objective having improved lateral color performance

2007-07-17

2007-07-17

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

C359S362000, C359S896000

Reexamination Certificate

active

11245591

ABSTRACT:
A system and method for inspection is disclosed. The design generally employs as many as four design principles, including employing at least one lens from a relatively low dispersion glass, at least one additional lens from an additional material different from the relatively low dispersion glass, generally matching the relatively low dispersion properties of the relatively low dispersion glass. The design also may include at least one further lens from a further material different from and exhibiting a significantly different dispersion power from the relatively low dispersion glass and the additional material. Finally, the design may include lenses positioned to insert a significant amount of color within the objective, a gap, and additional lenses, the gap and additional lenses serving to cancel the color inserted.

REFERENCES:
patent: 5888193 (1999-03-01), Breidenthal et al.
patent: 5933275 (1999-08-01), Igarashi
patent: 6545802 (2003-04-01), Hoogland
patent: 2004/0125446 (2004-07-01), Lei

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