Title:
NEAR-INFRARED LASER FOCUSING LENS AND LASER PRINTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/067103
Kind Code:
A1
Abstract:
A near-infrared laser focusing lens and a laser printing device. The lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens (L1, L2, L3, L4, L5) which are coaxially arranged along a transmission direction of incident light rays, wherein the first lens (L1) is a plane-concave negative lens; the second lens and the third lens (L2, L3) are biconvex positive lenses; and the fourth lens and the fifth lens (L4, L5) are meniscus positive lenses; and a concave surface (S2) of the first lens (L1) is opposite to the second lens (L2), and the middle parts of the fourth lens and the fifth lens (L4, L5) both reversely protrude towards the transmission direction of light beams. After the shapes and the relative locations of the lenses are designed, the near infrared light can be clearly imaged, and the geometrical aberration of the lens can be effectively corrected, so as to obtain a clear flat field. In addition, because of having a large relative aperture and visual field and a long working distance, the lens is a microscope objective simultaneously having a large visual field, a large relative aperture, a long working distance and a flat field, and is capable of improving printing finesse and clarity, so that the colour rendition is truer and the operation is more convenient.
Inventors:
LI JIAYING (CN)
ZHOU CHAOMING (CN)
SUN BO (CN)
GAO YUNFENG (CN)
ZHOU CHAOMING (CN)
SUN BO (CN)
GAO YUNFENG (CN)
Application Number:
PCT/CN2012/083858
Publication Date:
May 08, 2014
Filing Date:
October 31, 2012
Export Citation:
Assignee:
HANS LASER TECHNOLOGY CO LTD (CN)
HANS CNC SCIENCE & TECHNOLOGY CO LTD (CN)
HANS CNC SCIENCE & TECHNOLOGY CO LTD (CN)
International Classes:
B41C1/05; G02B13/14; G02B9/60; G02B11/30; G02B13/18
Foreign References:
| CN101093275A | 2007-12-26 | |||
| CN101827707A | 2010-09-08 | |||
| US6072518A | 2000-06-06 | |||
| CN102193170A | 2011-09-21 | |||
| RU2434256C1 | 2011-11-20 | |||
| EP1519210A1 | 2005-03-30 |
Other References:
See also references of EP 2908164A4
None
None
Attorney, Agent or Firm:
SHENZHEN ZHONGYI PATENT AND TRADEMARK OFFICE (CN)
深圳中一专利商标事务所 (CN)
深圳中一专利商标事务所 (CN)
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