Invention Application
WO2009139767A1 CATOPTRIC, ZERO-POWER, WIDE-FIELD-OF-VIEW OPTICAL SYSTEM WITH A POSTERIOR APERTURE STOP AND A LONG BACK FOCAL LENGTH
审中-公开
具有光功率，宽视场光学系统，具有前置光圈停止和长后焦距
- Patent Title: CATOPTRIC, ZERO-POWER, WIDE-FIELD-OF-VIEW OPTICAL SYSTEM WITH A POSTERIOR APERTURE STOP AND A LONG BACK FOCAL LENGTH
- Patent Title (中): 具有光功率，宽视场光学系统，具有前置光圈停止和长后焦距
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Application No.: PCT/US2008/063482Application Date: 2008-05-12
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Publication No.: WO2009139767A1Publication Date: 2009-11-19
- Inventor: COOK, Lacy
- Applicant: RAYTHEON COMPANY
- Applicant Address: 870 Winter Street Waltham, MA 02451 US
- Assignee: RAYTHEON COMPANY
- Current Assignee: RAYTHEON COMPANY
- Current Assignee Address: 870 Winter Street Waltham, MA 02451 US
- Agency: GREEN, Robert
- Main IPC: G02B17/06
- IPC: G02B17/06 ; G02B13/22 ; G02B13/14
Abstract:
A catoptric, wide-angle optical system includes at least three mirrors. Only the last mirror on the beam path (22) has a positive optical power and all other mirrors have negative optical power. The sum of the optical powers of the mirrors is zero. An external posterior aperture stop (35) is located on the beam path (22) between the last mirror and the image plane (24). The back focal length of the optical system (20) is equal to or greater than an effective focal length of the optical system (20). The field of view is large, and typically at least 30-40 degrees in one plane.
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