Title:
広角レンズ
Document Type and Number:
Japanese Patent JP6983203
Kind Code:
B2
Abstract:
The present invention discloses a wide angle lens. The wide angle lens comprises, from an object side in sequence: a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a positive refractive power, a fourth lens with a negative refractive power, a fifth lens with a positive refractive power, and a sixth lens with a negative refractive power. The wide angel lens further satisfies specific conditions: 0.80f1/f1.50, −0.50f2/f3−0.05, 1.15d1/d91.40 and T56min/d110.50. The wide angle lens can achieve a high performance while obtaining a low TTL.
Inventors:
Kenji Ikunuma
Zhang Lei
Zhang Lei
Application Number:
JP2019152937A
Publication Date:
December 17, 2021
Filing Date:
August 23, 2019
Export Citation:
Assignee:
AC Optics Solutions PTT Limited
International Classes:
G02B13/00; G02B13/18
Domestic Patent References:
| JP2014232147A | ||||
| JP2015169888A | ||||
| JP2015225102A |
Foreign References:
| US20190113719 | ||||
| US20180172955 | ||||
| US20170090156 |
Attorney, Agent or Firm:
Seiji Nishiuchi
Previous Patent: IgG4 Fc fragment containing mutated hinge region
Next Patent: Systems and methods for intramedullary nail implantation
Next Patent: Systems and methods for intramedullary nail implantation