Selective light transmission sheet

• US 4,590,118 A
• Filed: 02/16/1984
• Issued: 05/20/1986
• Est. Priority Date: 02/17/1983
• Status: Expired due to Term

• Current Assignee: Teijin Limited A Japanese Body of Corporate
• Original Assignee: Teijin Limited
• Inventors: Suzuki, Nobuo, Yatabe, Toshiaki, Itakura, Yoshio
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Atkinson, William M.
• Application Number:
  US06/581,001
• Time in Patent Office: 824 Days
• Field of Search: 428/461, 428/425.9, 428/469, 428/336, 428/339, 428/689, 428/696, 428/215
• US Class Current: 428/215
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers

Abstract

A selectively light transmission sheet composed of two selectively light transmitting structures, one comprising a single or separate two metal layers (A) and a single or separate two dielectric layers (B), another comprising an organic polymer layer (C) containing a near infrared ray absorbent.

Claims

1. A selective light transmission sheet having a selective light transmission laminate structure whose laminate structure comprises:

a first selectively light transmitting structure comprising;

(a) at least one metal layer formed of a metal selected from the group consisting of gold, silver, copper and their alloys, having a thickness ranging from 40 Å

to 300 Å

, and

(b) at least one dielectric layer having a refractive index of 1.35 to 2.5 and having a thickness ranging from 30 Å

to 1,500 Å

, and

a second selectively light transmitting structure comprising an organic polymer layer which contains a near infrared ray absorbent whose maximum absorption wave length is in the range of 800 nm to 1,200 nm, wherein said second selectively light transmitting structure has a transmission factor of 30% or less at the maximum absorption wavelength and, a visible light transmission factor of 50% or more, wherein said selective light transmission sheet has a visible light transmission factor of 50 to 80%.

2. A selective light transmission sheet according to claim 1, wherein said metal layer contains at least 30 wt % silver.

3. A selective light transmission sheet according to claim 1, wherein said organic polymer layer contains a near infrared ray absorbent in amounts of 1.0×

10^-10 mol/cm² to 9.0×

10^-4 mol/cm².

4. A selective light transmission sheet according to claim 1, wherein said first selectively light transmitting structure, comprises one metal layer and one dielectric layer formed thereon.

5. A selective light transmission sheet according to claim 1, wherein said first selectively light transmitting structure, comprises two separate metal layers and one dielectric layer which is sandwiched between said two metal layers

6. A selective light transmission sheet according to claim 1, wherein said metal layer has a metal or metal oxide precoat layer having a thickness of 5 to 100 Å

.

7. A selective light transmission sheet according to claim 1, wherein said metal layer has a metal or metal oxide postcoat layer having a thickness of 5 to 100 Å

.

8. A selective light transmission sheet according to claim 1, wherein said metal layer has both a metal or metal oxide precoat layer having a thickness of 5 to 100 Å

and a metal or metal oxide postcoat layer having a thickness of 5 to 100 Å

.

9. The selective light transmission sheet according to claim 1, wherein said first selectively light transmitting structure comprises two separate metal layers and two separate dielectric layers.

10. A selective light transmission sheet according to claim 1, wherein said near infrared ray absorbent is a compound expressed by formula (I):

##STR3## wherein M indicates a nickel (Ni) atom or a platinum (Pt) atom;

X indicates an oxygen (O) atom or a sulfur (S) atom;

R₁, R₂, R₃, and R₄ each represent an unsubstituted hydrocarbon group or a hydrocarbon group substituted by a halogen atom.

11. The selective light transmission sheet according to claim 10, wherein R₁ and R₂ combine with each other and R₃ and R₄ combine with each other to form unsubstituted aromatic hydrocarbon groups or substituted aromatic hydrocarbon groups substituted by a halogen atom.