Title:
投影レンズおよびプロジェクター
Document Type and Number:
Japanese Patent JP6582465
Kind Code:
B2
Abstract:
A projection lens included in a projector using laser beams as a light source is provided, the laser beams including as the light source, first blue laser light beams, second blue laser beams, first green laser beams, second green laser beams, first red laser beams, and second red laser beams, which are different in wavelength range. The projection lens has a relative maximum value of a transmittance on an optical axis between a wavelength not shorter than 645 nm and a wavelength not longer than 680 nm.
Inventors:
Miyuki Teramoto
Yasumasa Sawai
Hiroshige Takahara
Yasumasa Sawai
Hiroshige Takahara
Application Number:
JP2015053610A
Publication Date:
October 02, 2019
Filing Date:
March 17, 2015
Export Citation:
Assignee:
Konica Minolta Co., Ltd.
International Classes:
G03B21/14; G02B1/115; G02B13/00; G02B19/00; G03B21/00; H04N9/31; H04N13/363
Domestic Patent References:
| JP2015502558A | ||||
| JP2007213021A | ||||
| JP2001100002A | ||||
| JP2013238709A | ||||
| JP2009134217A | ||||
| JP2000047102A | ||||
| JP2009069369A |
Foreign References:
| WO2014132796A1 |
Attorney, Agent or Firm:
Fukami patent office