An Economical 6mm Aspheric Optical System
A technology of optical system and confocal optical system, which is applied in the field of economical 6mm aspheric optical system, can solve the problems of insufficient definition and cost increase of 6mm fixed-focus wide-angle lens, and achieve high-definition camera level, ultra-low cost, structural lens little effect
Active Publication Date: 2021-02-26
FUJIAN FORECAM OPTICS CO LTD
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Problems solved by technology
[0003] The present invention improves the above problems, that is, the technical problem to be solved by the present invention is that the existing 6mm fixed-focus wide-angle lens has insufficient definition and adopts a multi-lens structure to increase the cost
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[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] like figure 1 As shown, in this embodiment, an economical 6mm aspheric day and night confocal optical system, the optical system includes a biconcave lens A-1 and a first aspheric lens A-2 arranged at intervals from front to back along the incident light path , second aspheric lens A-3, stop D, third aspheric lens B1, fourth aspheric lens B2; where double concave lens A-1, first aspheric lens A-2, second aspheric lens A -3 constitutes a front group lens with a negative refractive power, a rear group lens with a positive refractive power composed of the third aspheric lens B1 and the fourth aspheric lens B2 lens, and the rear side of the fourth aspheric surface is also set There is a filter C.
[0014] The front group lens composed of biconcave lens A-1, the first aspheric lens A-2 and the second aspheric lens A-3 has a negati...
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The invention provides an economical-type 6mm aspheric optical system having the same focus during daytime and nighttime, and the system comprises a biconcave lens, a first aspheric lens, a second aspheric lens, a diaphragm, a third aspheric lens and a fourth aspheric lens, wherein the biconcave lens, the first aspheric lens, the second aspheric lens, the diaphragm, the third aspheric lens and thefourth aspheric lens are sequentially set at intervals along an incident optical path from the front to the rear. The biconcave lens, the first aspheric lens and the second aspheric lens form a frontlens group with the negative focal power, and the third aspheric lens and the fourth aspheric lens form a rear lens group with the positive focal power. The beneficial effects of the invention are that the system achieves the high resolution, zero temperature drift, shares the same focus during daytime and nighttime, and can adapt to CCDs or CMOSs (5,000,000 or less).
Description
technical field [0001] The invention relates to an economical 6mm aspheric optical system. Background technique [0002] There are a variety of 6mm fixed-focus lenses currently on the market for use in security systems, but it is difficult for lenses designed with glass to meet market demand in terms of pixels and performance. In order to improve performance and pixels, more glass lenses are used to achieve higher-definition image quality, which greatly increases product costs and makes product promotion more difficult. At present, in the security industry, there are few low-cost, high-quality, low-temperature drift fixed-focus lenses in the true sense. Contents of the invention [0003] The present invention improves the above problems, that is, the technical problem to be solved by the present invention is that the existing 6mm fixed-focus wide-angle lens has insufficient definition and adopts a multi-lens structure, resulting in increased cost. [0004] The specific e...
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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045
Inventor 张荣曜肖维军张世忠杨樟洪
Owner FUJIAN FORECAM OPTICS CO LTD