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Economical day and night high-definition zoom lens and control method thereof

A zoom lens, economical technology, applied in the field of lens, to achieve the effect of wide-spectrum confocal, small chromatic aberration, and improved resolution

Active Publication Date: 2017-10-31
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a resolution is far from meeting the requirements of the current high-definition cameras and the society's demand for the quality of the monitoring system.

Method used

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  • Economical day and night high-definition zoom lens and control method thereof
  • Economical day and night high-definition zoom lens and control method thereof

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Embodiment Construction

[0024] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

[0025] Such as figure 1 As shown, an economical day and night high-definition zoom lens, the optical system of the lens is provided with a front group A with a negative focal power and a rear group B with a positive focal power along the incident direction of the light from left to right. , a variable diaphragm C is arranged between the front group A and the rear group B, and the front group A is sequentially provided with a negative crescent lens A-1, a biconcave aspheric lens A-2 and a biconvex lens A-3, The rear group B is sequentially provided with a positive crescent aspheric lens B-1, a biconvex lens B-2, a plano-concave lens B-3 and a biconvex aspheric lens B-4.

[0026] In the embodiment of the present invention, the air gap between the front group A a...

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Abstract

The invention relates to an economic day and night high definition zoom lens, and a control method thereof, belonging to the lens field. The economic day and night high definition zoom lens is applied to an intelligent security video shooting system, and has the characteristics of high optical index, large optical target surface, and resolution factor no less than three megapixels. In a technical scheme, the optical system of the lens is successively provided with a front set of negative focal power, and a rear set of positive focal power along a light incident direction; a changeable diaphragm is arranged between the front set and the rear set; the front set is successively provided with a negative crescent lens, a double concave aspheric lens and a double convex lens; the rear set is successively provided with a positive crescent lens, a double convex lens, a plano-concave lens and a double convex aspheric lens. According to the invention, the focal power of the front and rear sets is reasonably distributed in a retrofocus type optical structure, allowing a whole optical structure to be insensitive; the aspheric lenses enlarge the angle of a visual field, and rectify a lens image difference, thereby meeting fine definition video shooting requirements.

Description

technical field [0001] The invention relates to an economical day and night high-definition zoom lens and a control method thereof, belonging to the field of lens technology. Background technique [0002] With the increasingly dense traffic network and increasingly busy traffic, in order to maintain traffic safety, prevent traffic jams, and achieve orderly under busy road conditions, it is of practical significance to provide a high-resolution day and night confocal lens for the development of intelligent transportation systems. The early fixed-focus lens has simple structure and low performance indicators. In terms of image definition, it can only be adapted to standard-definition CCD or CMOS cameras with 200,000 to 300,000 pixels. The needs of "seeing" can't even read the license plate number, and can't see the characteristics of the characters clearly. Such a resolution is far from meeting the requirements of the current high-definition cameras and the society's demand f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/177
CPCG02B15/177
Inventor 苏青年吴志良魏雄斌陈银娟
Owner FUJIAN FORECAM OPTICS CO LTD
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