Curved reflector having a flexible substrate

• US 5,276,600 A
• Filed: 05/27/1992
• Issued: 01/04/1994
• Est. Priority Date: 05/30/1991
• Status: Expired due to Term

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Toatsu Chemicals Incorporated (Mitsui Chemicals)
• Inventors: Fukuda, Nobuhiro, Takase, Mitsuo
• Primary Examiner(s): Lerner, Martin
• Assistant Examiner(s): JUBA JR, JOHN
• Application Number:
  US07/888,611
• Time in Patent Office: 587 Days
• Field of Search: 359/897, 359/883, 359/847, 359/867, 428/912.2, 428/461, 428/458, 362/320, 362/255, 362/256, 362/28, 362/260, 362/31, 362/347, 362/278
• US Class Current: 362/320
• CPC Class Codes: F21V 7/16 with provision for adjusting the curvature
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]

Abstract

A planar reflector is composed of a base and a flexible substrate having a high reflection layer formed thereon and overlayed on the base with an adhesive layer interposed between the high reflection layer and the base. The adhesion strength between the base and the substrate is at least 100 g/cm, and the thickness of the adhesive layer is not smaller than 0.5 μm but not greater than 50 μm. A curved reflector can be obtained by bending the planar reflector so that a curved surface having a radius of curvature not greater than 5 mm is formed presenting a concave surface on a side of the flexible substrate.

Claims

1. A curved reflector obtained by bending a planar reflector composed of a base and a flexible substrate having a high reflection layer formed thereon and overlayed on the base with an adhesive layer interposed between the high reflection layer and the base, the adhesion strength between the base and the substrate being at least 100 g/cm and the thickness of the adhesive layer being not smaller than 0.5 μ

m but not greater than 50 μ

m, whereby a curved surface having a radius of curvature not greater than 5 mm is formed presenting a concave surface on a side of the flexible substrate.

2. The reflector of claim 1, wherein the substrate is a flexible substrate capable of substantially shielding ultraviolet rays, and the high reflection layer contains silver.

3. The reflector of claim 2, wherein the light transmittance of the flexible substrate at wavelengths of 380-300 nm is not greater than 10%.

4. The reflector of claim 1, wherein the visible light reflectance of the flexible substrate with the high-reflection layer formed therein is at least 80%.

5. A planar reflector comprising a base and a flexible substrate having a high reflection layer formed thereon and overlayed on the base with an adhesive layer interposed between the high reflection layer and the base, the adhesion strength between the base and the substrate being at least 100 g/cm and the thickness of the adhesive layer being not smaller than 0.5 μ

m but not greater than 50 μ

m.