Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
New lens material undergoes tests
Tests to compare impact resistance of new lenses with hardened safety glass and acetate were conducted; polycarbonate lenses used in testing were .065 and acetate were standard .50; temperature of materials and environment during testing was stabilized at approximately 70F; lenses were supported on metal ring eliminating possibility of cushioning effect.
New lens material undergoes tests
Tests to compare impact resistance of new lenses with hardened safety glass and acetate were conducted; polycarbonate lenses used in testing were .065 and acetate were standard .50; temperature of materials and environment during testing was stabilized at approximately 70F; lenses were supported on metal ring eliminating possibility of cushioning effect.
New lens material undergoes tests
Safety Maintenance
Safety Maintenance ; 128
1964
4 pages
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
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