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Coaxial four-reflecting optical system

An optical system, coaxial technology, applied in the field of optical systems, can solve the problems of high-precision coincidence of the optical reference and the installation reference, reduce the imaging quality of the optical system, affect the energy entering the system, etc., and reduce the number of degrees of freedom of assembly and structure. Compact, increase the effect of light path deflection

Inactive Publication Date: 2009-11-11
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

In the case of a large field of view, the coaxial three-reflection optical system has too much central occlusion, which affects the energy entering the system and also reduces the imaging quality of the optical system; while the off-axis three-reflection optical system increases Degree of freedom, each degree of freedom of lens deflection and rotation needs to be corrected and adjusted, and the optical reference and installation reference cannot coincide with high precision, which brings great difficulties to processing, assembly and inspection

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Embodiment Construction

[0013] see figure 1 , the incident light 1 sequentially passes through the primary mirror 2 , the secondary mirror 3 , the third mirror 4 and the fourth mirror 5 , and then converges at the focal plane receiver 6 . In the present invention, there are one or more intermediate real image planes in the reflection light path of each reflector.

[0014] Referring to Fig. 2, there are one or more intermediate real image planes in the reflected light path of the present invention. The incident light 1 is reflected by the primary mirror 2 , the secondary mirror 3 , the third mirror 4 and the fourth mirror 5 in sequence, and converges at the focal plane receiver 6 . Wherein the image plane position can be imaged after the reflection of the third mirror 4 and the fourth mirror 5 after imaging once in the central field of view, that is, the image plane position is behind the secondary mirror 3, as shown in Figure 2 (a); The surface position can also be imaged once after the third mirro...

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Abstract

The invention relates to a coaxial four-reflecting optical system which comprises a main mirror (2), a secondary mirror (3), a third mirror (4) and a fourth mirror (5). The main mirror (2) and the third mirror (4) are arranged on the same side, and the secondary mirror (3) and the fourth mirror (5) are arranged at the other side corresponding to the main mirror (2) and the third mirror (4); the secondary mirror (3) is arranged on a reflected light path of the main mirror (2), the third mirror (4) is arranged on a reflected light path of the secondary mirror (3), and the fourth mirror (5) is arranged on a reflected light path of the third mirror (4). The coaxial four-reflecting optical system has large obstacle-free field of vision, is convenient to process, mount and adjust and is ideal to adjust the distortion.

Description

technical field [0001] The invention belongs to the field of optical systems, in particular to a coaxial four-reflection optical system. Background technique [0002] Existing three-reflection systems include coaxial three-reflect systems and off-axis three-reflect systems. In the case of a large field of view, the coaxial three-reflection optical system has too much central occlusion, which affects the energy entering the system and also reduces the imaging quality of the optical system; while the off-axis three-reflection optical system increases Degree of freedom, each degree of freedom of lens deflection and rotation needs to be corrected and adjusted, and the optical reference and installation reference cannot coincide with high precision, which brings great difficulties to processing, assembly and inspection. The coaxial three-reflection system and the off-axis three-reflection system are not ideal for distortion correction due to their own characteristics. Therefore,...

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Application Information

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IPC IPC(8): G02B17/06
Inventor 马臻李英才李旭阳马洁樊学武
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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