Multilayered filter films

• US 6,088,162 A
• Filed: 07/11/1997
• Issued: 07/11/2000
• Est. Priority Date: 08/28/1995
• Status: Expired due to Fees

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Someno, Yoshihiro
• Primary Examiner(s): HENRY, JON W
• Application Number:
  US08/893,411
• Time in Patent Office: 1,096 Days
• Field of Search: 359/580, 359/587, 359/588, 359/589, 359/890, 359/891, 359/892, 359/513
• US Class Current: 359/580
• CPC Class Codes: G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements G02B1/08 takes precedence
• CPC Class Codes: G02B 2006/12109 Filter
• CPC Class Codes: G02B 5/285 comprising deposited thin solid films G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361
• CPC Class Codes: G02B 6/12007 forming wavelength selective elements, e.g. multiplexer, demultiplexer
• CPC Class Codes: G02B 6/132 by deposition of thin films
• CPC Class Codes: G02B 6/29361 Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters

Abstract

The present invention relates to multilayered filter films, and in particular, a multilayered filter film not having a substrate and a method for making the same. The method for making the multilayered filter film not having a substrate includes a step for forming a filter frame layer having a window on the substrate, a step for forming a multilayered film on the substrate inside the window and on the filter frame layer, and a step for removing the substrate from the filter frame layer and the multilayered film.

Claims

1. A multilayered optical filter film having wavelength selectivity comprising a multilayered film and a filter frame layer;

the multilayered film having lower, upper and side surfaces;

the filter frame layer having a window and upper and lower surfaces;

the multilayered film being disposed in and held inside the window by the filter frame layer so that the lower surfaces of the multilayered film and the filter frame layer are formed on the same plane.

2. A multilayered filter film in accordance with claim 1, further comprising a groove along a frame on said filter frame layer, and said multilayered film being disposed on the groove.

3. A multilayered filter film in accordance with claim 1, further comprising a protective layer so as to cover the upper, lower and side surfaces of said multilayered film.

4. A multilayered optical filter film having wavelength selectivity comprising a multilayered film and a filter frame layer;

the multilayered film having upper, lower and side surfaces and a periphery;

the filter frame layer having a window and upper and lower surfaces;

the multilayered film being disposed in the window of the filter frame layer, wherein the lower surface of the multilayered film and the lower surface of the filter frame layer are formed on the same plane and the periphery of the multilayered film extends beyond the window of the filter frame layer.

5. A multilayered filter film in accordance with claim 4 wherein the periphery of the multilayer film is supported by the upper surface of the filter frame layer.

6. A multilayered filter film in accordance with claim 4, further comprising a groove along a frame on said filter frame layer, and said multilayered film being disposed on the groove.

7. A multilayered filter film in accordance with claim 4, further comprising a protective layer so as to cover the upper, lower and side surfaces of said multilayered film.