Wide angle lens system

Details Wide angle lens system Wide angle lens system

2005-03-22

2005-03-22

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S797000

Reexamination Certificate

active

06870692

ABSTRACT:
A wide angle lens system comprises at least three lens element cemented together as a single lens unit and an object side part of the lens unit has a negative refractive power and a rear part of the lens unit has a positive refractive power.

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patent: 5943172 (1999-08-01), Sasaya et al.
patent: 6130787 (2000-10-01), Tsuchida
patent: 6226132 (2001-05-01), Abe
patent: 6621641 (2003-09-01), Takatsuki
patent: 20010008418 (2001-07-01), Yamanaka et al.
patent: 20030125080 (2003-07-01), Shimamura
patent: 10-115776 (1998-06-01), None

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