Large-relative-aperture underwater zoom imaging lens

An imaging lens, relative aperture technology, applied in installation, optics, instruments, etc., can solve the problems of inability to image quality, large lens aberration, and small field of view, and achieve the requirements of imaging, large relative aperture, and high illumination. Effect

Pending Publication Date: 2018-10-09
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0002] The optical photography lens used in the air medium is assembled with a water-tight and sealed window. Working underwater will cause

Method used

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  • Large-relative-aperture underwater zoom imaging lens
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  • Large-relative-aperture underwater zoom imaging lens

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0030] The invention provides a large relative aperture underwater zoom imaging lens, such as figure 1 , 5 , structure shown in 9, this camera lens comprises waterproof window 1, zoom lens group and imaging CCD14 that are made up of 11 lenses, zoom lens group comprises front fixed group, zoom group and rear fixed group successively from object side to image side. The front fixed group includes the first lens 2 and the second lens 3, the zoom group includes the third lens 4, the fourth lens 5, the diaphragm 13 and the fifth lens 6, and the rear fixed group includes the sixth lens 7, the seventh lens 8, The eighth lens 9, the ninth lens 10, the tenth lens 11 and the eleventh lens 12; the first lens 2 is an aspheric doublet lens for correcting chromatic aberration; the second le...

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Abstract

The invention discloses a large-relative-aperture underwater zoom imaging lens, which comprises a water-proof window, a zoom lens set composed of eleven lenses, and an imaging CCD. The zoom lens set sequentially comprises a front fixing group, a zoom group and a rear fixing group from the object side to the image side. The front fixing group comprises a first lens and a second lens. The zoom groupcomprises a third lens, a fourth lens, a diaphragm and a fifth lens. The rear fixing group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens. Thefirst lens is a non-spherical double-glued lens for correcting the chromatic aberration. The second lens is an aspherical lens with positive focal power. The third lens, the ninth and the tenth lenses are lenses with negative focal power. The fourth lens, the fifth lens and the sixth lens are double-glued lens for correcting the chromatic aberration. The seventh lens, the eighth lens and the eleventh lens are lenses with positive focal power. The lens disclosed by the invention has a large relative aperture. The lens is ensured to be high in illumination degree under a large visual field, sothat the imaging requirement can be met.

Description

technical field [0001] The invention relates to an underwater optical imaging system, in particular to an underwater three-speed zoom lens with a large relative aperture and a large viewing angle. Background technique [0002] The optical photography lens used in the air medium is assembled with a water-tight and sealed window. Working underwater will cause the aberration of the lens to be too large and the field of view to become smaller, which cannot meet the requirements of imaging quality. Therefore, in order to meet the needs of imaging in seawater, it is necessary to increase the relative aperture to improve the utilization efficiency of underwater light energy and the working distance. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a large relative aperture underwater zoom imaging lens to achieve the purpose of having a large relative aperture, ensuring high illuminance under a large field of view, a...

Claims

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Application Information

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IPC IPC(8): G02B15/177G02B7/02
CPCG02B7/025G02B15/177
Inventor 马海宽张述伟郭翠莲马然吴宁曹煊褚东志刘凤庆张丽孙中梁
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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