EYEPIECE LENS, OPTICAL DEVICE INCLUDING EYEPIECE AND EYEPIECE LENS MANUFACTURING METHOD

To solve the problem in which obtaining of a high magnification ratio makes conventional eyepiece lenses difficult to obtain excellent optical performance.SOLUTION: An eyepiece lens includes, in order from an observation object side,: a first lens that has positive refractive power; a second lens th...

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Bibliographische Detailangaben
1. Verfasser:	KURASHIGE TAKAMICHI
Format:	Patent
Sprache:	eng ; jpn
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:	To solve the problem in which obtaining of a high magnification ratio makes conventional eyepiece lenses difficult to obtain excellent optical performance.SOLUTION: An eyepiece lens includes, in order from an observation object side,: a first lens that has positive refractive power; a second lens that has negative refractive power; a third lens that has the positive refractive power; and a fourth lens that has the positive refractive power, and satisfies a following conditional expression. 0.8