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Off-axis three-mirror optical system with freeform surfaces
Off-axis three-mirror optical system with freeform surfaces
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机译:具有自由曲面的离轴三镜光学系统
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摘要
An off-axis three-mirror optical system with freeform surfaces includes a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. The primary mirror receives light rays first and the secondary mirror is located on a path of light reflected from the primary mirror. The tertiary mirror receives light reflected from the secondary mirror. The image sensor is located on a path of light reflected from the tertiary mirror. Each reflecting surface of the primary and tertiary mirrors is a sixth order xy polynomial freeform surface. The secondary mirror reflecting surface is a spherical surface. A field of view of the off-axis three-mirror optical system with freeform surfaces in Y-axis direction is greater or equal to 65°. A field of view of the off-axis three-mirror optical system with freeform surfaces in X-axis direction is greater or equal to 0.8°.
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