Lens unit

Details Lens unit Lens unit

2009-08-17

2010-06-22

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Single component with multiple elements

C359S740000, C359S797000, C359S819000

Reexamination Certificate

active

07742245

ABSTRACT:
A lens unit includes at least three lenses that are laminated and received in a lens barrel. The lenses include a first lens, a second lens, and a third lens that are laminated from the side of an object in this order. The first lens includes a first contact face that is formed at an outer peripheral portion thereof and comes in contact with the second lens, and a first opposite surface that is formed at an inner peripheral portion of the first contact face, is spaced from the second lens, and faces the second lens. The second lens includes a second contact face that is formed at a position closer to the center of the second lens than the first contact face and comes in contact with the third lens, and a second opposite surface that is formed at an outer peripheral portion of the second contact face, is spaced from the third lens, and faces the third lens.

REFERENCES:
patent: 6870693 (2005-03-01), Ito
patent: 6954311 (2005-10-01), Amanai
patent: 7221524 (2007-05-01), Ye et al.
patent: 7230777 (2007-06-01), Ye
patent: 7362519 (2008-04-01), Sakaki
patent: 7639438 (2009-12-01), Chen
patent: 2006/0158750 (2006-07-01), Takahashi
patent: 2007/0268601 (2007-11-01), Yu
patent: 2008/0225414 (2008-09-01), Ozaki et al.
patent: 2008-52196 (2008-03-01), None

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