Title:
偏波分離素子、光学系及び光学機器
Document Type and Number:
Japanese Patent JP6767792
Kind Code:
B2
Abstract:
A polarized wave separation element includes a multilayer film between a first substrate and a second substrate, the multilayer film being formed by alternately stacking a relatively low refractive index substance and a relatively high refractive index. Define a pair of a low refractive index substance layer and a high refractive index substance layer as a stack, half or more than half of stacks in the multilayer film satisfy following conditional expression (1), where an nth stack from the first substrate is named as an nth stack, Ln is an optical film thickness of the low refractive index substance of the nth stack, and Hn is an optical film thickness of the high refractive index substance of the nth stack, H1:L1=Hn:Ln (1), the polarized wave separation element further comprises a plurality of stacks in the multilayer film satisfying following conditional expressions (2a) and (2b): Hn=H1×(a+(n−2)×b) (2a), Ln=L1×(a+(n−2)×b) (2b), where a constant a is 1.1 to 1.3, and a constant b is 0.3 to 0.6.
Inventors:
Koichi Ogawa
Application Number:
JP2016131344A
Publication Date:
October 14, 2020
Filing Date:
July 01, 2016
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G02B5/30; A61B1/00; G02B23/26
Domestic Patent References:
| JP2009540364A | ||||
| JP11167026A | ||||
| JP2001051121A |
Attorney, Agent or Firm:
Keisuke Saito