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One-way mirrors for upper-level observation deck viewing down into a classroom (University of Wisconsin-Eau Claire) A one-way mirror, also called two-way mirror [1] (or one-way glass, half-silvered mirror, and semi-transparent mirror), is a reciprocal mirror that appears reflective from one side and transparent from the other. The perception of ...
The optical boxes were produced in three versions for 15 + 1 ⁄ 2, 17 + 3 ⁄ 4 and 19 + 7 ⁄ 8 inch [diagonal] screens. Two further sizes were available for front projection onto 44 or 52 inch screens. [13] The difference was solely the position of the tube's screen relative to the concave mirror and the optical characteristic of the Schmidt ...
High-reflection (HR) coatings work the opposite way to antireflection coatings. The general idea is usually based on the periodic layer system composed from two materials, one with a high index, such as zinc sulfide (n=2.32) or titanium dioxide (n=2.4), and one with a low index, such as magnesium fluoride (n=1.38) or silicon dioxide (n=1.49).
Philips Telecommunicatie en Informatie Systemen (Philips Computers) was a subsidiary of Philips that designed and manufactured personal computers. [1] [2] Philips Computers was active from 1963 through 1992. [3] Before that, Philips produced three computers between 1953 and 1956, all for internal use, PETER, STEVIN, and PASCAL. [4]
The P2000M incorporated two 5¼-inch floppy disk drives, [7] besides a built-in monochrome screen. It could run CP/M or Microsoft BASIC applications, depending on the cartridge used. It was incompatible with the P2000T due to the way it handled display of special characters (color, "graphics mode"), which made most P2000T games unplayable.
The thousands of tiny mirrors are angled to create a surface that curves and bends in different directions. The curves direct rays from an object across the mirror's face before sending them back to the viewer, flipping the conventional mirror image. [1] A patent for a non-reversing mirror was issued to John Joseph Hooker in 1887. [2]
It is present because while these mirrors' convexity gives them a useful field of view, it also makes objects appear smaller. Since smaller-appearing objects seem farther away than they actually are, a driver might make a maneuver such as a lane change assuming an adjacent vehicle is a safe distance behind, when in fact it is quite a bit closer ...
A trumeau mirror is a type of wall mirror originally manufactured in France in the later 18th century. It takes its name from the French word trumeau, which designates the space between windows. Such a mirror, usually rectangular, could also hang above an overmantel. A decorative carved or painted scene was the prominent characteristic, and ...