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High-definition pinhole lens used in field of security and protection

A high-definition, pinhole technology, applied in optical components, instruments, optics, etc., can solve the problems of low resolution and inability to meet high-definition image applications, and achieve the effect of small and compact structure and good shockproof effect

Active Publication Date: 2021-04-23
NANYANG LIDA PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common resolution of the existing products on the market is not high, which cannot meet some applications that require high-definition images.

Method used

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  • High-definition pinhole lens used in field of security and protection
  • High-definition pinhole lens used in field of security and protection
  • High-definition pinhole lens used in field of security and protection

Examples

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Embodiment Construction

[0022] Below in conjunction with the accompanying drawings of the present invention, the specific implementation manners of the embodiments of the present invention will be described in detail, as figure 1 As shown, the above-mentioned pinhole monitoring lens, from the object space to the image space, sequentially includes a front lens group A01 with negative refractive power, a rear lens group A02 with positive refractive power, a diaphragm STOP and a filter F.

[0023] Embodiments of the pinhole lens system used in the field of security monitoring:

[0024] The front lens group A01 includes a first lens L1 with negative power;

[0025] The rear lens group A02 includes the second lens L2 with positive power, the third lens L3 with negative power, the fourth lens L4 with positive power, the fifth lens L5 with positive power, and the third lens L3 with positive power. The sixth lens L6 having negative refractive power and the seventh lens L7 having negative refractive power. ...

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Abstract

A high-definition pinhole lens used in field of security and protection is disclosed in the invention, and comprises a front lens group and a rear lens group which are sequentially arranged from an object side to an image plane, a diaphragm is arranged between the front lens group and the rear lens group, and an optical filter is arranged between the rear lens group and the image plane; the front lens group comprises a first lens with negative focal power; the rear lens group comprises a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with positive focal power and a seventh lens with negative focal power, and the third lens and the fourth lens form a first cemented lens group; and the sixth lens and the seventh lens form a second cemented lens group. Compared with like lenses in the prior art, the high-definition pinhole lens is small and compact in overall structure, has a good shockproof effect, can stably work in the environment of -40 to 80 DEG C, and is very suitable for being used in a high-definition security monitoring system in a hidden place.

Description

technical field [0001] The invention relates to the technical field of optical imaging equipment, in particular to a high-definition pinhole lens used in the security field. Background technique [0002] The principle of pinhole imaging has existed since ancient times, but around the 1830s, due to the emergence of chemical photosensitive materials, the pinhole lens became a reality, especially in recent decades, due to the rapid development of society and the rapid development of the electronics industry With the advancement, the pinhole lens was widely used. As the name suggests, the pinhole lens is small in size and can be installed in places where it is inconvenient to place large camera equipment. In recent years, pinhole lenses have been more and more used in some specific monitoring occasions, such as unannounced visits, evidence collection, counters, etc., because of their small size, light weight, portability, and ease of carrying. They have played an important role...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/00G02B13/005
Inventor 黄晓光刘海军张许娜陈胜利刘维娜李智超杨方元
Owner NANYANG LIDA PHOTOELECTRIC
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