Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A method for producing a coupler for use with a multi-mode glass fiber to couple-out and couple-in a light signal to the glass fiber, said coupler comprising a substrate, a main line having a square cross section disposed on said substrate, said main line having at least one branch line extending on said substrate therefrom, said branch line having a rectangular cross section smaller than the square cross section of the main line and having one surface coplanar with the surface of the main line, said method including providing a sheet of thermoplastic material of the thickness equal to the thickness of the main line, stamping the coupler from the sheet with a stamp having a shape corresponding to the configuration of the coupler.
Claim 2
Independent Claim
124 words
A method for producing a coupler for use with a multi-mode glass fiber to couple-out and couple-in a light signal to the glass fiber, said coupler comprising a substrate, a main line having a square cross section disposed on said substrate, said main line having at least one branch line extending on said substrate therefrom, said branch line having a rectangular cross section smaller than the square cross section of the main line and having one surface coplanar with the surface of the main line, said method including providing a sheet of thermoplastic material of the thickness equal to the thickness of the main line, stamping the coupler from the sheet with a stamp having a shape corresponding to the configuration of the coupler.
Claim 3
Dependent Claim
42 words
A method according to claim 1, wherein said branch line has a thickness less than the thickness of the main line and wherein the step of stamping includes simultaneously embossing a portion of the sheet forming the branch line to said thickness.
Claim 4
Independent Claim
153 words
A method for producing a coupler for use with a multi-mode glass fiber to couple-out and couple-in a light signal to the glass fiber, said coupler comprising a substrate, a main line having a square cross section disposed on said substrate, said main line having at least one branch line extending on said substrate therefrom, said branch line having a rectangular cross section smaller than the square cross section of the main line and said branch having one surface coplanar with the surface of the main line, said method comprising the steps of providing a substrate having a refraction of index lower than the refraction of index of a light sensitive material, applying a layer of said light sensitive material on said substrate, providing a mask corresponding to the configuration of the main line and branch line, exposing the layer of synthetic material, developing the material to leave the coupler on this substrate.
Claim 5
Independent Claim
153 words
A method for producing a coupler for use with a multi-mode glass fiber to couple-out and couple-in a light signal to the glass fiber, said coupler comprising a substrate, a main line having a square cross section disposed on said substrate, said main line having at least one branch line extending on said substrate therefrom, said branch line having a rectangular cross section smaller than the square cross section of the main line and said branch having one surface coplanar with the surface of the main line, said method comprising the steps of providing a substrate having a refraction of index lower than the refraction of index of a light sensitive material, applying a layer of said light sensitive material on said substrate, providing a mask corresponding to the configuration of the main line and branch line, exposing the layer of synthetic material, developing the material to leave the coupler on this substrate.
Claim 6
Dependent Claim
84 words
A method according to claim 3, wherein said branch line has a thickness less than the thickness of the main line and which method includes after the step of developing the layer of photosensitive material, applying a second layer of photosensitive material, exposing the second layer with a mask having the configuration of the main line and developing the second layer to complete formation of the main line so that the branch line has a thickness less than the thickness of the main line.