INFRARED-TRANSMITTING COVER

• US 20130063810A1
• Filed: 11/06/2012
• Published: 03/14/2013
• Est. Priority Date: 11/12/2004
• Status: Abandoned Application

• Current Assignee: Tokai Optical Co., Ltd.
• Original Assignee: Tokai Optical Co., Ltd.
• Inventors: MIYAGUCHI, Akira, Sugimoto, Ryo
• Application Number:
  US13/670,127
• Publication Number:
  US 20130063810A1
• Time in Patent Office: Days
• US Class Current: 359/359
• CPC Class Codes: G02B 5/281 designed for the infrared light

Abstract

An infrared transparent cover for an infrared signal port of an electronic device includes a base layer having infrared transparency, an infrared transparent and visible light reflective dielectric multilayer film laminated on the base layer to reflect light having a desired color, and a frosted surface formed on the base layer at a location corresponding to the dielectric multilayer film.

Claims

1. An infrared transparent cover for an infrared signal port of an electronic device, the infrared transparent cover comprising:

a base layer having infrared transparency;

an infrared transparent and visible light reflective dielectric multilayer film laminated on the base layer to reflect light having a desired color; and

a frosted surface formed on the base layer at a location corresponding to the dielectric multilayer film.

2. The infrared transparent cover according to claim 1, wherein the frosted surface is a roughened surface formed on the base layer.

3. The infrared transparent cover according to claim 1, wherein the frosted surface is an inner surface of the base layer and the dielectric multilayer film is laminated directly on the frosted surface of the base layer.

4. The infrared transparent cover according to claim 1, wherein the frosted surface is an outer surface of the base layer opposite to an inner surface of the base layer on which the dielectric multilayer film is laminated.

5. The infrared transparent cover according to claim 1, wherein the frosted surface is arranged such that the reflected light having the desired color from the dielectric multilayer film passes through the frosted surface and then is outwardly emitted from the transparent cover.

6. The infrared transparent cover according to claim 1, wherein the frosted surface is arranged such that the reflected light having the desired color from the dielectric multilayer film and visible light scattered at the frosted surface cooperate to generate a pearl-like luster appearance coloring of the infrared transparent cover.

7. The infrared transparent cover according to claim 1, wherein the cover is transparent to infrared signals for IrDA devices.

8. An electronic device comprising:

an infrared signal port; and

the infrared transparent cover according to claim 1 attached to the infrared signal port.