Reflection mirror and optical equipment using the same
AssigneeCanon Kabushiki Kaisha
InventorsMitsuharu Sawamura, Shumpei Tatsumi
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AssigneeCanon Kabushiki Kaisha
InventorsMitsuharu Sawamura, Shumpei Tatsumi
Estimating the term…
A reflection mirror includes an underlaying layer, a reflection layer, and a protective layer on a resin substrate in the order from the resin substrate, in which the reflection layer is composed of an Ag film, each of the underlaying layer and the protective layer includes at least one TiO2 film and at least one Al2O3 film, and a film of the underlaying layer contacting the resin substrate is a TiO2 film.
A reflection mirror comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
At least one of the reflecting layers comprising metal: the reflecting layers comprising a single metallic layer with one or more dielectric layers
Optical elements, systems or apparatus
Term ended 27 Feb 2024 (estimated)
1. Field of the Invention
The present invention relates to a reflection mirror and optical equipment using the reflection mirror, which is stable, has satisfactory durability, and provides a high reflectance, for example, in a predetermined wavelength band in a visible range (wavelength: 400 to 700 nm), and is suitable when applied to an optical member used in an optical system such as a TV camera, a video camera, a digital camera, or the like.
2. Related Background Art
FIG. 1 is a schematic view of an embodiment according to the present invention.
FIG. 2 is a schematic view of another embodiment according to the present invention.
FIG. 3 is a schematic view of yet another embodiment according to the present invention.
Hereinafter, the present invention will be described in detail by way of an embodiment with reference to the drawing.
FIG. 1 is a schematic cross-sectional view showing the main portion of an embodiment of a reflection mirror (silver reflection mirror) according to the present invention. In the reflection mirror of the present example, an underlaying layer 20, a silver layer 30, and a protective layer 40 are provided successively on a resin substrate 10.
More specifically, the underlaying layer 20 including three layers 21, 22 and 23 is provided on the resin substrate 10. Then, a reflection layer (silver layer) 30, and a protective layer 40 including two layers 41 and 42 are further provided thereon.