Long-focal length apochromatic optical lens applicable to long-distance imaging

An optical lens and apochromatic technology, applied in the field of optical lenses, can solve the problems of difficult processing, limited size, and high cost, and achieve the effect of improving low-contrast resolution, consistent imaging quality, and strictly correcting distortion.

Active Publication Date: 2016-12-21
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the field of view of the total reflection system is difficult to enlarge, the processing is difficult, the cost is high, or there are factors such as central occlusion that affect the imaging quality and detection ability
The advantage of the refraction system is that the

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  • Long-focal length apochromatic optical lens applicable to long-distance imaging
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  • Long-focal length apochromatic optical lens applicable to long-distance imaging

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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0029] figure 1 Is the basic structure diagram of the Petzval objective lens, figure 2 The optical lens shown in the present invention includes a first lens group 1, an aperture stop 4, a second lens group 2, a third lens group 3, and an image plane 5 in sequence along the light incident direction. The first lens group 1 is composed of 3 or 4 lenses. When the lenses are 4, they are the first refractive positive lens 11, the first refractive negative lens 12, the second refractive positive lens 13, and the second refractive negative lens 14, forming The structure of the first lens grou...

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Abstract

The invention relates to the optical lens technical field and relates to a long-focal length apochromatic optical lens applicable to long-distance imaging. The optical lens includes a first lens group, an aperture diaphragm, a second lens group, a third lens group and an image plane which are distributed sequentially along the incident direction of light; the first lens group includes a first refraction positive lens, a first refraction negative lens, a second refraction positive lens and a second refraction negative lens which are distributed sequentially; the second lens group includes a third refraction positive lens and a third refraction negative lens; and the third lens group includes a fourth refraction positive lens and a fourth refraction negative lens. According to the meter-scale apochromatic optical lens of the invention is realized based on a simple Petzval structure. The apochromatic optical lens has the advantages of large relative aperture, small relative distortion, excellent on-axis and off-axis imaging quality, high consistency and the like.

Description

technical field [0001] The invention relates to the technical field of optical lenses, and specifically discloses a long focal length apochromatic optical lens suitable for long-distance imaging. Background technique [0002] In many application fields, in order to obtain high resolution and good image plane illumination, the optical imaging system is required to have a large aperture and a long focal length; in addition, due to the development and progress of detection devices, the spectral response range is getting wider and wider. Put forward the demand of wide spectrum band. For long-focal-length high-resolution optical imaging lenses based on the principle of refraction, the secondary spectrum is an important factor restricting the imaging quality, and its correction is the focus and difficulty in optical design. [0003] For the catadioptric optical system, its total reflection front group has the inherent advantage of chromatic aberration correction and can share mos...

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Application Information

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IPC IPC(8): G02B13/00G02B1/00
CPCG02B1/00G02B13/00
Inventor 贾平王灵杰谭双龙张建萍史广维冯秀恒
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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