Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A heat ray screening glass characterized by comprising: a sheet of glass (5), a first layer (1) which overlays the glass sheet (5) and is 55 nm to 70 nm thick and has a refractive index of 1.8 to 2.1 at a wavelength of 550 nm, a second layer (2) which overlays on the first layer (1) and consists of a TiO₂ film which is 30 nm to 55 nm thick and has a refractive index of 2.3 to 2.5 at a wavelength of 550 nm, and a third layer (3) which overlays on the second layer (2) and is 45 nm to 60 nm thick and has a refractive index of 1.8 to 2.1 at a wavelength of 550 nm.
Claim 2
Dependent Claim
121 words
A heat ray screening glass characterized by comprising: a sheet of glass (5), a first layer (1) which overlays the glass sheet (5) and is 55 nm to 70 nm thick and has a refractive index of 1.8 to 2.1 at a wavelength of 550 nm, a second layer (2) which overlays on the first layer (1) and consists of a TiO₂ film which is 30 nm to 55 nm thick and has a refractive index of 2.3 to 2.5 at a wavelength of 550 nm, and a third layer (3) which overlays on the second layer (2) and is 45 nm to 60 nm thick and has a refractive index of 1.8 to 2.1 at a wavelength of 550 nm.
Claim 3
Dependent Claim
46 words
A heat ray screening glass according to claim 1, characterized by further comprising a film (4), interposed between the second layer (2) and the third layer (3), and which consists of nitride of Ti, Zr or Hf and has a thickness not greater than 10 nm.
Claim 4
Dependent Claim
53 words
A heat ray screening glass according to claim 1 or 2, characterized in that an absolute value of each difference in chromaticity coordinates is less than 0.03, the differences being obtained by subtracting the chromaticity coordinates of the sheet of glass (5) from the chromaticity coordinates of the heat ray screening glass, respectively.
Claim 5
Dependent Claim
48 words
A heat ray screening glass according to claim 1 or 2, characterized in that the first layer (1) consists of an oxide film selected from the group SnO₂, ZrO₂, Al₂O₃, Ta₂O₅, ZnO and In₂O₃, and the third layer (3) consists of an oxide film selected from the group.
Claim 6
Dependent Claim
26 words
A heat ray screening glass according to claim 1 or 2, characterized in that the first, second and third layers (1, 2, 3) are substantially transparent.
Claim 7
Dependent Claim
26 words
A heat ray screening glass according to claim 4, characterized in that the first layer (1) and the third layer (3) consist of a SnO₂ film.