Optical system of attitude sensor

Abstract

The invention discloses an optical system of an attitude sensor. A diaphragm of the optical system is arranged on the first surface of the quartz window plate glass of the optical system, which is beneficial to reducing the size of the optical system and eliminating parasitic light; and the optical system can simultaneously realize large field, large aperture and achromatism by utilizing four common optical materials and effectively shorten the size of the optical system by using a plurality of osculant positive and negative lenses to correct aberration. By adopting the layout mode, the optical system has higher MTF (modulation transfer function) while ensuring relatively uniform full field defocused spots, thereby being capable of giving consideration to both the optical imaging of a star sensor and the imaging of the optical sensor with high resolution requirements.

Description

technical field [0001] The invention relates to an attitude sensor optical system, which can be used as the optical lens of the optical attitude sensor, and can also be used as the optical lens of other imaging optical sensors. Background technique [0002] In the optical system, there is a category of sensor lenses, such as star sensor lenses, rendezvous and docking measurement sensor lenses, etc. The sensor lens imaging structure can generally be divided into three categories, one is refraction, one is refraction, and the other is reflection. Among the three types, the refraction type has more applications, and the other two types have fewer applications. Gaussian imaging structure and Petzwart imaging structure are commonly used in refraction type. The advantage of Gaussian type is that the structure is symmetrically distributed relative to the aperture stop, and the off-axis aberration has a counteracting effect, so a larger field of view can be obtained. , The disadva...

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Problems solved by technology

Wu Feng et al. published an article "Design of Optical System of Light and Small Star Sensor" in Acta Photonica Sinica in November 2004, and designed a star sensor optical system with a focal length of 22.7mm, a relative aperture of 1 / 1.4, and a field of view of 24°. , the imaging structure adopted is that the front of the third lens is used as an aperture stop, and the front two lenses play the role of expanding the field of view. The disadvantage is that the radial size of these two lenses is relatively large

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