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Ultraviolet continuous zooming telescopic optical system

An optical system and positive focal power technology, which is applied in the field of ultraviolet telescopic optical systems, can solve the problems of inability to achieve continuous zoom, small zoom ratio, and increased difficulty in processing and testing.

Active Publication Date: 2021-05-18
NANJING UNIV OF INFORMATION SCI & TECH
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  • Description
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Problems solved by technology

[0007] The existing technology mainly has the following disadvantages: in order to improve the zoom ratio of the ultraviolet zoom system, aspherical or binary diffractive optical elements are used, which increases the difficulty of processing and detection; some ultraviolet optical systems use two-speed zoom, the zoom ratio is small, and Unable to achieve continuous zoom

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  • Ultraviolet continuous zooming telescopic optical system
  • Ultraviolet continuous zooming telescopic optical system
  • Ultraviolet continuous zooming telescopic optical system

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Embodiment Construction

[0037] Such as figure 1 , a kind of ultraviolet continuous zoom telescopic optical system described in the present embodiment comprises front fixed lens group 1, zoom lens group 2, compensating lens group 3, aperture stop 513 and rear fixed lens group 1 that are arranged sequentially from object space to image space Lens group 4; the front fixed lens group 1 includes a first lens 101 and a second lens 102 arranged sequentially from the object space to the image space, the first lens 101 is a convex-concave lens with negative refractive power, and the second lens 102 is a double lens with positive refractive power Convex lens, the front fixed lens group 1 has positive refractive power; the variable power lens group 2 includes the third lens 203, the fourth lens 204 and the fifth lens 205 which are arranged in sequence from the object space to the image space, and the third lens 203 has negative optical power double-concave lens, the fourth lens 204 is a convex-concave lens with...

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Abstract

The invention discloses an ultraviolet continuous zoom telescopic optical system which comprises a front fixed lens group, a zoom lens group, a compensation lens group and a rear fixed lens group which are sequentially arranged from an object space to an image space, and an aperture diaphragm is arranged between the compensation lens group and the rear fixed lens group and is close to the rear fixed lens group. According to the invention, continuous zooming can be realized, the focal length variation range is 120-480 mm, the zooming range is large, and the consistency of system resolution and the stability of imaging performance are realized under different focal lengths; the invention provides an ultraviolet telescopic optical system with a fixed F number and a large zoom ratio, the F number of the system is 4.5, and the zoom ratio is 4. All the lenses are spherical lenses.

Description

technical field [0001] The invention relates to an ultraviolet telescopic optical system, in particular to an ultraviolet continuous zoom telescopic optical system. Background technique [0002] With the continuous development of ultraviolet detection technology, the ultraviolet band, as an important detection spectral window, has broad application prospects in civil, industrial and military fields, and can be used in long-distance and large-scale high-voltage corona detection, missile Position alarm and aerospace remote sensing and other occasions. Most of the existing ultraviolet optical systems are fixed-focus optical systems, which make it difficult to detect ultraviolet targets at different positions and distances. Compared with the ultraviolet fixed-focus optical system, the ultraviolet zoom optical system can realize large-area target search and small-area target positioning at the same time. [0003] Patent application CN102621677A discloses an ultraviolet zoom ima...

Claims

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Application Information

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IPC IPC(8): G02B15/14G02B13/02
CPCG02B15/144113G02B13/02
Inventor 叶井飞马梦聪朱润徽丁天宇宋真真曹兆楼
Owner NANJING UNIV OF INFORMATION SCI & TECH
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