Optical system, image projection device, and imaging device
The optical system addresses wide-angle projection challenges by employing a specific lens configuration with an intermediate imaging position, achieving reduced distortion and long back focus, enhancing optical performance.
JP7884185B2Inactive Publication Date: 2026-07-03PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Patent Information
- Application Number
- JP2024528286
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2022-06-16
- Filing Date
- 2023-02-24
- Publication Date
- 2026-07-03
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
The present disclosure is an optical system including therein a middle imaging position MI conjugate with each of an enlargement conjugate point on an enlargement side and a reduction conjugate point on a reduction side, the optical system comprising: an enlargement optical system Op having a plurality of lens elements and positioned further on the enlargement side than the middle imaging position MI; and a relay optical system Ol having a plurality of lens elements and positioned further on the reduction side than the middle imaging position MI. A first lens element L1 positioned furthest on the enlargement side of the enlargement optical system Op has positive power. The optical system satisfies 0.9≤f1 / f2≤1.5 (f1: focal length of the enlargement optical system Op, f2: focal length of the relay optical system Ol).
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Citation Information
Patent Citations
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