公开(公告)号：EP1417525A2

公开(公告)日：2004-05-12

申请号：EP02794710.0

申请日：2002-08-16

申请人： Carl Zeiss SMT AG

发明人： MANN, Hans-Jürgen ,  ULRICH, Wilhelm

IPC分类号： G02B17/08 ,  G02B17/06

CPC分类号： G03F7/70291 ,  G02B17/0652 ,  G03F7/70225 ,  G03F7/70233

摘要： Objective (1) having a first partial objective (3) which projects a first field plane (7) onto an intermediate image (11) and comprises a first convex mirror (13) with a first central mirror aperture (15) and a second concave mirror (17) with a second central mirror aperture (19), the first mirror (13) having a first axial spacing from the second mirror (17 )', and the second mirror (17) having a second axial spacing from the intermediate image (11), and the ratio of the first axial spacing to the second axial spacing having a value of between 0.95 and 1.05, in particular between 0.98 and 1.02, and a second partial objective (5), which projects the intermediate image (11) onto a second field plane (9) and comprises a third concave mirror (21) with a third central mirror aperture (23) and a fourth concave mirror (25) with a fourth central mirror aperture (27) 1 the third mirror (21) having from the second field plane (9) a third axial spacing ZM3-IM which has the following relationship with a numerical aperture NA in the second field plane (9) and with a diameter DUM3 of the third mirror (21) : (I), the objective (1) having a Petzval radius whose absolute value is greater than the axial spacing of the first field plane (7) from the second field plane (9) .

公开(公告)号：EP0801758B1

公开(公告)日：1999-03-17

申请号：EP94918736.3

申请日：1994-06-15

申请人： Gallert, Frank

发明人： Gallert, Frank

IPC分类号： G02B17/06 ,  G02B23/06

CPC分类号： G02B17/0652 ,  G02B17/0626 ,  G02B23/06

公开(公告)号：EP0801758A1

公开(公告)日：1997-10-22

申请号：EP94918736

申请日：1994-06-15

申请人： GALLERT FRANK

发明人： GALLERT FRANK

IPC分类号： G02B17/06 ,  G02B23/06

CPC分类号： G02B17/0652 ,  G02B17/0626 ,  G02B23/06

摘要： A mirror system has four mirrors with a common optical axis, i.e. a first collecting mirror (1), a second smaller dispersing mirror (2), a third collecting mirror (3) and a fourth collecting mirror (4), seen in the direction of light incidence. Mirror (1) reflects incident light on mirror (2) that forms an intermediate image (5) of the light. The dispersed light then reaches mirror (3) that acts as a collimator and reflects parallel light on mirror (4), that in turn reflects the light on image field (6) in which a detector (7) is arranged. Mirror (1) has a central bore (10). Flat mirrors (8) fold the path of the light and are preferably arranged in the plane of intermediate image (5). An image field flattening lens (9) can flatten image field (6). Both classical Cassegrain systems and Ritchey-Chretien systems that consist of mirrors (1) and (2) may be aplanatically and anastigmatically corrected with a flat image field (6) by means of the disclosed two-mirror corrector made of mirrors (3) and (4).

公开(公告)号：EP0763214A1

公开(公告)日：1997-03-19

申请号：EP95915127.0

申请日：1995-03-31

申请人： Gallert, Frank

发明人： Gallert, Frank

IPC分类号： G02B17

CPC分类号： G02B17/0631 ,  G02B17/0626 ,  G02B17/0652

摘要： In mirror systems with three mirrors, light falls in its direction of displacement on a primary mirror (1), is reflected on a secondary mirror (2), then on a tertiary mirror (3) that bundles the light in a focal plane (4) into which a detector (5) may be introduced. The disclosed mirror systems may be designed to be free from spherical aberration, coma and astigmatism. In addition, the curvature radius of mirrors (1, 2 and 3) may be selected in mirror systems with at least one divergent mirror (1, 2 or 3) in such a way that the Petzval sum be also equal to zero, so that besides eliminating astigmatism a flat image field is obtained. Otherwise, the image field may be flattened by an image field flattening lens (6). The path of the beams may be folded by plane mirrors (7). The surface of mirrors (1, 2, 3 and 7) may be designed as holograms or as multilayered mirrors. The disclosed mirror systems may be designed as objective lenses, as magnifying or diminishing projection lenses, as afocal systems, as collimators and as real or virtual point light sources.

公开(公告)号：EP0677955A2

公开(公告)日：1995-10-18

申请号：EP95302393.4

申请日：1995-04-11

申请人： Hughes Aircraft Company

发明人： Klapper, Stuart H. ,  Cook, Lacy G.

IPC分类号： H04N5/33

CPC分类号： G02B17/0657 ,  G02B17/0652 ,  H04N3/09 ,  H04N5/33

摘要： A low cost infrared camera (1) for night vision. The camera (1) is disposed within a housing (2) having an infrared transmissive window (6) disposed at an input aperture (5) thereof. A compact reflective optical arrangement (10) is disposed within the housing (2) to focus energy from the window (5) onto a focal plane array (20). A chopper disk (19) is positioned between the reflective optical arrangement (10) and the focal plane array (20) to establish a reference level for the array (20) and to facilitate a sequential readout thereof. A signal processing circuit (100) is included for processing the output of the array (20) for display on a standard video screen.
Thus, the problems with uncooled detectors are overcome by use of a fast reflective optical system in combination with an uncooled detector. The fast reflective optical system provides a high signal level to the uncooled detector, thereby compensating for losses in collection of thermal radiation. Reflective optical systems can be manufactured inexpensively from plastic or aluminum and reduce the needed for expensive infrared materials commonly used in military systems. The combination of the fast reflective optics and uncooled detector provides a truly low cost thermal camera for night vision.

摘要翻译： 用于夜视的低成本红外摄像机（1）。 相机（1）设置在具有布置在其输入孔（5）处的红外透射窗口（6）的壳体（2）内。 紧凑的反射光学布置（10）设置在壳体（2）内以将来自窗（5）的能量聚焦到焦平面阵列（20）上。 斩波盘（19）定位在反射光学装置（10）和焦平面阵列（20）之间，以建立阵列（20）的参考电平并便于其顺序读出。 包括信号处理电路（100），用于处理阵列（20）的输出以便在标准视频屏幕上显示。 因此，通过使用快速反射光学系统与未经制造的检测器组合来克服非制冷检测器的问题。 快速反射光学系统为未冷却的检测器提供高信号电平，从而补偿热辐射收集中的损耗。 反射光学系统可以廉价地从塑料或铝制造，并且减少军用系统中通常使用的昂贵的红外材料的需要。 快速反射光学和非冷却检测器的组合为夜视提供了一种真正低成本的热像仪。