Film-attached transparent substrate, top plate for cooker, window glass for heat cooker, and cover glass

2:

• The film-attached transparent substrate according to claim 1, wherein a refractive index of the light-absorbing film at a wavelength of 550 nm is not less than 1.0 and not more than 2.2.

3:

• The film-attached transparent substrate according to claim 1, wherein at least one of the one or more high-refractive index films is at least one selected from the group consisting of niobium oxide, silicon nitride, tantalum oxide, titanium oxide, zirconium oxide, hafnium oxide, and aluminum oxide.

4:

• The film-attached transparent substrate according to claim 1, wherein, in the multi-layer film, the one or more high-refractive index films and the one or more low-refractive index films are alternately layered.

5:

• The film-attached transparent substrate according to claim 1, wherein an outermost layer of the multi-layer film located on a side thereof opposite to the transparent substrate is a film containing silicon oxide or silicon nitride.

6:

• The film-attached transparent substrate according to claim 1, wherein the material having a band gap of not less than 2.0 eV and not more than 2.7 eV is a metal oxide.

7:

• The film-attached transparent substrate according to claim 1, wherein the antireflection film has an electric resistance value of 106Ω or more.

8:

• The film-attached transparent substrate according to claim 1, wherein when light is allowed to enter the film-attached transparent substrate through the antireflection film, the film-attached transparent substrate exhibits a luminous reflectance of 2% or less.

9:

• The film-attached transparent substrate according to claim 1, wherein when light is allowed to enter the film-attached transparent substrate through the transparent substrate, the film-attached transparent substrate exhibits a luminous reflectance of 6% or less.

10:

• The film-attached transparent substrate according to claim 1, having a luminous transmittance of 75% or less.

11:

• The film-attached transparent substrate according to claim 1, wherein, regarding at least one of a luminous reflectance and a luminous transmittance of the film-attached transparent substrate, an absolute a* value in a L*a*b* color system at an angle of light incidence of 0° is 5 or less and an absolute b* value in the L*a*b* color system at an angle of light incidence of 0° is 5 or less.

12:

• The film-attached transparent substrate according to claim 1, wherein, regarding at least one of a luminous reflectance and a luminous transmittance of the film-attached transparent substrate, an absolute value of a difference between an a* value at an angle of light incidence of 0° and an a* value at an angle of light incidence of 45° in a L*a*b* color system is 5 or less and an absolute value of a difference between a b* value at an angle of light incidence of 0° and a b* value at an angle of light incidence of 45° in the L*a*b* color system is 5 or less.

13:

• A top plate for a cooker, the top plate comprising the film-attached transparent substrate according to claim 1, wherein
• the transparent substrate has a cooking surface on which a cooking utensil is to be placed and an underside surface opposite to the cooking surface, and
• the antireflection film is disposed on the underside surface of the transparent substrate.

14:

• A window glass for use in a heat cooker, the window glass comprising the film-attached transparent substrate according to claim 1, wherein the light-absorbing film is disposed on a principal surface of the transparent substrate located toward a heating device of the heat cooker.

15:

• A cover glass for use with a display, the cover glass comprising the film-attached transparent substrate according to claim 1, wherein
• the transparent substrate is a front substrate, and
• the antireflection film is disposed on a principal surface of the transparent substrate located on an opposite side of the transparent substrate relative to a principal surface of the transparent substrate where the display is provided.