Title: An optical filter arrangement
Application Number: 95103352 Application Date: 1995.04.12
Publication Number: 1120170 Publication Date: 1996.04.10
Approval Pub. Date: 2001.11.21 Granted Pub. Date: 2001.11.21
International Classifi-cation: G02B5/20
Applicant(s) Name: Domenico Orzi Address:
Inventor(s) Name: Domenico Orzi;Ettienne Theron
Attorney & Agent: WU ZENGYONG MA TIELIANG
Abstract:
    An optical filter arrangement comprises at least two optical filter elements including a transparent substrate and an optical coating typically comprising at least two overlying optical thin films. The coating defines a first patterned area and a second surround area bordering the first area. The first area has substantially the same optical transmittance characteristics as the second area and different optical reflectance characteristics over at least a portion of the visible spectrum. The distinction between the first area and the second area is visually perceptible when viewed from one side of the optical filter arrangement and is substantially visually imperceptible when viewed from the opposite side of the optical filter arrangement. As a result, a coloured pattern or logo is only visible when viewed from one side of the filter arrangement.
Time: 11
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