IMAGING OPTICAL SYSTEM, AND PROJECTION-TYPE IMAGE DISPLAY APPARATUS AND IMAGE PICKUP APPARATUS USING THE SAME

IMAGING OPTICAL SYSTEM, AND PROJECTION-TYPE IMAGE DISPLAY APPARATUS AND IMAGE PICKUP APPARATUS USING THE SAME

Imaging optical system including a first optical unit (1) having positive refractive power for making an image at the enlargement-side of the imaging optical system and an intermediate image (3) conjugate to each other, and a second optical unit (2) having positive refractive power for making the in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: INOKO, Kazuhiro
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SEALS
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Beschreibung
Zusammenfassung:Imaging optical system including a first optical unit (1) having positive refractive power for making an image at the enlargement-side of the imaging optical system and an intermediate image (3) conjugate to each other, and a second optical unit (2) having positive refractive power for making the intermediate image (3) and the image plane (5) at the reduction-side of the imaging optical system conjugate to each other, wherein when the focal length of the first optical unit (1) is denoted fF and the focal length of the second optical unit (2) is denoted fR, the inequalities 0 < fF/fR < 0.8 are satisfied, and wherein the second optical unit (2) includes a negative lens (L11) disposed closest to the enlargement side.