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The Swedish electronic computer BESK, built in 1953, displayed 18 hexadecimal digits using edge-lit acrylic, the grey squares at the center of the green console.. It contains a set of sandwiched acrylic or clear plastic panels, each of which is engraved with a numeral or character to be displayed.
The device controlled the edging of the displayed characters in a manner that took background variables into account. In 1972, the company hired Joseph L. Scheuer as its vice president of operations (he was an engineer at Leonard's Digitronics). From 1971 to 1978, Eugene Leonard was the company's president, and also directed engineering.
LOCA suppliers aim to match the refractive index of glass and clear plastic PMMA (refractive index approximately 1.5) used in displays to minimize loss. LOCA suppliers such as Momentive Materials and Henkel report an increased contrast of 400% in sunlight through the use of LOCA with anti-reflective glass, vastly improving the viewing ...
This material is produced in vacuum sizes and can withstand a full vacuum at room temperature. It is a thermoplastic PVC-based material with plasticizer. [3] Tygon R-1000 Ultra-Soft Tubing is used in general laboratory applications. It is the softest of the Tygon formulations with a durometer hardness of Shore A 40 (ASTM Method D2240-02).
The sleeve is clear and cleans easily; you only have to slip it out of its case, rinse it with warm water or cleaning liquid, and then let it dry out. Price: $34.95 Get the Fleshlight Quickshot ...
A standard channel letter is a three-dimensional graphic sign element. Its channel is fabricated from sheet metal, most often aluminum since it will not rust. A flat sheet of aluminum is typically cut on a table by a computer-controlled router, laser, or water jet, based on a vector-based art file (.cdr, .eps, .ai, .scv, .sci, or .fs).
An optical fiber is a flexible, transparent fiber made by drawing glass or plastic to a diameter slightly thicker than that of a human hair. [5] Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications , where they permit transmission over longer ...
Diffuse reflection - Generally, when light strikes the surface of a (non-metallic and non-glassy) solid material, it bounces off in all directions due to multiple reflections by the microscopic irregularities inside the material (e.g., the grain boundaries of a polycrystalline material or the cell or fiber boundaries of an organic material ...
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