Title:
フィルター
Document Type and Number:
Japanese Patent JP6688547
Kind Code:
B2
Abstract:
PURPOSE: To provide a filter which has such an impact absorption function as to prevent an outer frame from damaging a lens even when a filter hits against something, and can cut a female thread for mounting a related component.CONSTITUTION: A filter that is mounted on a front surface of a lens barrel of a digital camera and a digital video camera includes a filter lens, a lens holding frame holding the filter lens and an outer frame positioned on the outer peripheral part of the lens holding frame, in which the outer frame is formed of a synthetic resin having Rockwell hardness (HR) of R40 to R130.SELECTED DRAWING: Figure 1
Inventors:
Yutaka Karasawa
Kaoru Takahashi
Kaoru Takahashi
Application Number:
JP2017212937A
Publication Date:
April 28, 2020
Filing Date:
November 02, 2017
Export Citation:
Assignee:
Marumi Koki Co., Ltd.
International Classes:
G03B11/00
Domestic Patent References:
| JP2016057384A | ||||
| JP8325340A | ||||
| JP2014098831A | ||||
| JP2002354629A | ||||
| JP2011213990A | ||||
| JP2005301173A | ||||
| JP2013156483A | ||||
| JP2013178443A |
Attorney, Agent or Firm:
Takashi Hatakeyama
Yasuo Fukuda
Yasuo Fukuda