Fixed-focus lens

The fixed-focus lens includes a yellow-brown first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence in one direction. And the aperture is arranged between the first lens to the fourth lens. The ratio of the maximum diameter of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WANG, KUOUAN, LIU, PEIING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	The fixed-focus lens includes a yellow-brown first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence in one direction. And the aperture is arranged between the first lens to the fourth lens. The ratio of the maximum diameter of the first lens and the axial distance from the outer surface of the first lens to the outer surface of the seventh lens is between 0.4 and 0.5. And the first lens to the seventh lens are all glass spherical lenses.