Bildgebungslinse und Bildgebungsvorrichtung

Details

Veröffentlichungs-Nr.

EP3647849

Aktenzeichen

EP19197383

Anmeldetag

13. September 2019

Veröffentlichung

4. August 2021

Erteilung

4. August 2021

Rechtsraum

EP

IPC

G02B9/64G02B13/04

Abstract

An imaging lens (21) includes a first lens group (G1), a second lens group (G2) having positive refractive power, an aperture (S), and a third lens group (G3) having positive refractive power, sequentially disposed in that order from an object side to an image side. During a focusing from infinity to a short length, a combination of the second lens group (G2), the aperture (S), and the third lens group (G3) as a single unit move to the object side so as to reduce a distance to the first lens group (G1). The second lens group (G2) includes four lenses of a second-first negative lens (L<21>), a second-second positive lens (L<22>), a second-third negative lens (L<23>), and a second-fourth positive lens (L<24>) sequentially disposed in that order from the object side to the image side.

Anmelder

Firma

Ricoh Company, Ltd.

Land

🇯🇵 Japan

Fachgebiete