MULTIPURPOSE COLLAPSIBLE OPERA GLASSES

PURPOSE: To safely make an opera glasses available by cutting off sunlight and to utilize it for multi-purpose use under various circumstances by providing a roof part over an objective lens and making the roof part foldable using one sheet of cardboard. CONSTITUTION: The main body is made of a base...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	NISHII TAKAYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
Online-Zugang:	Volltext bestellen
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