Title:
PROJECTION LENS AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/235252
Kind Code:
A1
Abstract:
This projection lens is attached to a housing of a projection device having an electro-optical element, and is provided with: a first holding part that holds a first optical system which is disposed along a first optical axis and through which light from the housing passes; a first reflecting part that bends light on the first optical axis so as to become light on a second optical axis; a second reflecting part that bends light on the second optical axis so as to become light on a third optical axis; and a second holding part that holds the first reflecting part and the second reflecting part. The length of the first optical axis between the first reflecting part and a first lens, which uses glass and is the furthest among the first optical system toward the reduction side, is longer than the length of the second optical axis between the first reflecting part and the second reflecting part. The first optical system has an aspherical third lens that uses a resin material and is between the first lens and the first reflecting part.
Inventors:
AMANO MASARU (JP)
KAYANO HIRONOBU (JP)
KAYANO HIRONOBU (JP)
Application Number:
PCT/JP2020/016198
Publication Date:
November 26, 2020
Filing Date:
April 10, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B17/08; G03B21/00; G03B21/14; G03B21/28; H04N5/74
Domestic Patent References:
| WO2017169903A1 | 2017-10-05 | |||
| WO2013171995A1 | 2013-11-21 |
Foreign References:
| JP2018021943A | 2018-02-08 | |||
| JP2013015853A | 2013-01-24 | |||
| JP2005309251A | 2005-11-04 | |||
| US20060028738A1 | 2006-02-09 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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