ANTI-REFLECTION FILM, OPTICAL LENS AND OPTICAL LENS UNIT

Title:

ANTI-REFLECTION FILM, OPTICAL LENS AND OPTICAL LENS UNIT

Document Type and Number:

Japanese Patent JP2003248103

Kind Code:

A

Abstract:

To provide an anti-reflection film having anti-reflection performance over a wide band from the ultraviolet region to the visible region, further to the infrared region.

Counted from the substrate side, a film with an intermediate refractive index material is formed on a first layer, a film with a high refractive index material is formed on a second and a fourth layers, a film with a low or intermediate refractive index material is formed on a third layer, and a film with a low refractive index material is formed on a fifth layer, respectively. The film thickness and of each optical layer, in terms of the design wavelength λ, is (0.08 to 1.31)×λ/4 in the first layer, is (0.17 to 0.36)×λ/4 in the second layer, is (0.45 to 0.91)×λ/4 in the third layer, is (0.15 to 0.33) × λ/4 in the fourth layer, and is (1.13 to 1.17)×λ/4 in the fifth layer.

Inventors:

UZAWA KUNIHIKO
KAWAMATA TAKESHI
WADA YORIO
DEGUCHI TAKESHI
TOYOHARA NOBUYOSHI

Application Number:

JP2002049608A

Publication Date:

September 05, 2003

Filing Date:

February 26, 2002

Export Citation:

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Assignee:

OLYMPUS OPTICAL CO

International Classes:

G02B1/11; B32B7/02; G02B1/115; (IPC1-7): G02B1/11; B32B7/02

Domestic Patent References:

JPH1039105A	1998-02-13
JPH1123837A	1999-01-29
JP2000356704A	2000-12-26
JP2001013305A	2001-01-19
JPH11264902A	1999-09-28
JP2000111703A	2000-04-21
JPH07244202A	1995-09-19
JP2001330705A	2001-11-30
JPH0756004A	1995-03-03

Foreign References:

WO2001023914A1

2001-04-05

Attorney, Agent or Firm:

Takeshi Nara

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