Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 22, 2021
Patent Application Number
16231535
Date Filed
December 23, 2018
Patent Primary Examiner
Patent abstract
A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. Each reflective surface of the primary mirror, the secondary mirror, and the tertiary mirror is an xy polynomial freeform surface. A field angle of the freeform surface off-axial three-mirror imaging system is larger than or equal to 60°×1°. An F-number of the freeform surface off-axial three-mirror imaging system is less than or equal to 2.5.
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