A long focal length apochromatic optical lens suitable for long distance imaging
An optical lens and apochromatic technology, applied in the field of optical lenses, can solve the problems of difficult processing, high cost, and limited size, and achieve the effects of improving low-contrast resolution, strictly correcting distortion, and consistent imaging quality
Active Publication Date: 2018-09-04
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 there is no obstruction, it is easy to achieve a large field of view, the processing and adjustment methods are conventional, the system is stable, and the stray light is easy to control; the disadvantage is that the size is limited and the secondary spectrum correction is difficult
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with 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 surface 5 in sequence along the light incident direction. The first lens group 1 is made up of 3 or 4 lenses, and when there are 4 lenses, the first refraction positive lens 11, the first refraction negative lens 12, the second refraction positive lens 13 and the second refraction negative lens 14, form The first lens group 1 with the struct...
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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. Along the light incident direction, this optical lens includes first lens group, aperture stop, second lens group, third lens group, image plane; , the second refraction positive lens and the second refraction negative lens; the second lens group includes the third refraction positive lens and the third refraction negative lens; the third lens group includes the fourth refraction positive lens and the fourth refraction negative lens. The apochromatic optical lens with meter-level focal length is realized by using a simple Petzval structure, which has the characteristics of large relative aperture, small relative distortion, excellent on-axis and off-axis imaging quality and high consistency.
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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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