Cassegrain for enhancing stray light-extinction effect and improved-type imaging system thereof
An imaging system and an improved technology, applied in optics, optical components, instruments, etc., can solve problems such as complex structures, and achieve the effects of small height, reduced weight and volume, and reduced load
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[0053] as attached Figure 13 As shown, Cassegrain and its improved imaging system with a stray light elimination device include a secondary mirror 6 with a convex reflective surface, a primary mirror 7 with a concave reflective surface, a secondary mirror shading tube 1 and a primary mirror shading tube 4 , wherein the primary mirror 7 and the secondary mirror 6 are arranged on the same optical axis, the primary mirror 7 has a central circular hole 8, the primary mirror shading tube 4 is located at the central circular hole 8 of the primary mirror 7, and the secondary mirror shading tube 1 is set on the secondary mirror 6 The outer edge of the secondary mirror shading cylinder 1 is provided with an additional extinction cylinder for preventing light from entering the image plane through the central circular hole 8 of the primary mirror 7 between the secondary mirror shading cylinder 1 and the primary mirror shading cylinder 4. 2. The stray light elimination device is composed...
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