Title:
IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2008/075469
Kind Code:
A1
Abstract:
An imaging lens in which optical performance does not deteriorate even in a high
temperature environment, various aberrations are corrected well and sufficient
back focus is ensured while shortening the optical length. The imaging lens consists
of a first diaphragm (S1), a first joint compound lens (14), a second
diaphragm (S2), and a second joint compound lens (16) arranged in this
order from the object side toward the image side.The first joint compound lens
consists of a first lens (L1), a second lens (L2) and a third
lens (L3) arranged in this order from the object side toward the image
side, and the second joint compound lens consists of a fourth lens (L4),
a fifth lens (L5) and a sixth lens (L6) arranged in this order
from the object side toward the image side. The first lens and the third lens,
the fourth lens and the sixth lens are formed of curing resin material. The second
lens and the fifth lens are formed of glass material.
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Inventors:
DO, Satoshi (1-2-56, Miyado Asaka-sh, Saitama 31, 3510031, JP)
Application Number:
JP2007/058042
Publication Date:
June 26, 2008
Filing Date:
April 12, 2007
Export Citation:
Assignee:
MILESTONE CO., LTD. (1-1 Nikko-cho, Fuchuu-shi Tokyo, 44, 1830044, JP)
マイルストーン株式会社 (〒44 東京都府中市日鋼町１番１ Tokyo, 1830044, JP)
マイルストーン株式会社 (〒44 東京都府中市日鋼町１番１ Tokyo, 1830044, JP)
International Classes:
G02B13/00; G02B13/18
Attorney, Agent or Firm:
OHGAKI, Takashi et al. (4F Ikebukuro Center Building, 35-3 Higashi Ikebukuro 1-chome,Toshima-k, Tokyo 13, 1700013, JP)
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