US Patent Application 18232936. OPTICAL SYSTEM, IMAGE PROJECTION APPARATUS, AND IMAGING APPARATUS simplified abstract

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OPTICAL SYSTEM, IMAGE PROJECTION APPARATUS, AND IMAGING APPARATUS

Organization Name

Panasonic Intellectual Property Management Co., Ltd.

Inventor(s)

Qinghua Zhao of Miyagi (JP)

Katsu Yamada of Osaka (JP)

Takuya Imaoka of Kanagawa (JP)

OPTICAL SYSTEM, IMAGE PROJECTION APPARATUS, AND IMAGING APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18232936 titled 'OPTICAL SYSTEM, IMAGE PROJECTION APPARATUS, AND IMAGING APPARATUS

Simplified Explanation

The patent application describes an optical system with an intermediate imaging position that is conjugate with both a magnification conjugate point and a reduction conjugate point.

  • The system includes a magnification optical system and a relay optical system.
  • The magnification optical system is positioned on the magnification side with respect to the intermediate imaging position.
  • The relay optical system is positioned on the reduction side with respect to the intermediate imaging position.
  • The relay optical system includes multiple moving lens groups that can independently move in the optical axis direction during zooming.
  • The moving lens group closest to the reduction side has a negative refractive power.


Original Abstract Submitted

The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugate with both of a magnification conjugate point on a magnification side and a reduction conjugate point on reduction side, including: a magnification optical system including a plurality of lens elements and positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system including a plurality of lens elements and positioned on the reduction side with respect to the intermediate imaging position, wherein the relay optical system includes a plurality of moving lens groups which are independently movable in an optical axis direction during zooming, and wherein the reduction side-closest moving lens group that is positioned closest to the reduction side among the plurality of moving lens groups has a negative refractive power.

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