Synchronous-monitoring dual-system optical imaging telephoto lens for security protection

Abstract

The invention relates to a synchronous-monitoring dual-system optical imaging telephoto lens for security protection. The telephoto lens comprises a telephoto lens main object lens a and a telephoto lens auxiliary reflector d, and is characterized by further comprising a wide-angle lens object lens b, and the wide-angle lens object lens and the telephoto lens main object lens are coaxially arranged. The synchronous-monitoring dual-system optical imaging telephoto lens has the advantages that relative to a large-zoom-ratio zoom lens, the system can achieve a wider-angle lens and longer-focus telephoto zoom ratio, for example, the focal length of more than 2m; and the difficulty in optical design of an image zoom lens is lowered, and high image quality which can not be easily realized by the zoom lens is improved. As the wide-angle lens and the telephoto lens are in a coaxial mode, the zoom ratio switching is easier in the monitoring process, and the optical-path design structures of different wide-angle lenses and telephoto lenses are different.

Description

technical field

[0001] The invention relates to a monitoring system, in particular to a synchronous monitoring dual-system optical imaging security telephoto lens for forest fire prevention. Background technique

[0002] The existing technology adopts a zoom optical system with a large zoom ratio. This optical system needs to satisfy the clear imaging of low-power and high-power lenses, and its manufacturing cost is very high. During the use of these two high-power focal lengths, low-power or high-power cannot be used for observation at the same time, but can only be observed from low-power to high-power zoom or high-power to low-power zoom. Most surveillance lenses use zoom lenses, from wide-angle lenses to telephoto lenses, but the larger the ratio of the maximum focal length to the minimum focal length of the wide-angle and telephoto lenses, the more difficult the design of the entire optical path and the higher the processing cost. In order to achieve wide-angle and tele...

Examples

Embodiment 1

[0025] Such as figure 2 As shown, a hole is punched in the center of the first (group) glass of the existing telephoto lens (ie, the main objective lens a of the telephoto lens), and the objective lens group of the wide-angle lens is fixed in the fixing frame k; the objective lens group of the wide-angle lens will be installed The fixing frame of the fixed frame is set on the hole, so that the objective lens b of the wide-angle lens is coaxial with the main objective lens a of the telephoto lens. An aperture j is also sleeved on the fixed frame outside the sub-reflector d of the telephoto lens.

Embodiment 2

[0027] Such as image 3 As shown, in the center of the front and back of the first piece (group) of glass of the telephoto lens (that is, the main objective lens a of the telephoto lens), a wide-angle lens objective lens b1 and b2 are respectively set (pasted or integrally formed or otherwise combined), A wide-angle lens objective lens b2, a reflector e, and a telephoto lens sub-reflector d are sequentially arranged in the fixed frame; an aperture j is sheathed on the fixed frame outside the telephoto lens sub-reflector d.

Embodiment 3

[0029] Such as Figure 4 As shown, in the center of the back of the first piece (group) of glass of the telephoto lens (that is, the main objective lens of the telephoto lens a), there is a wide-angle lens objective lens b, and the wide-angle lens objective lens The group is arranged in the fixed frame, and the light barrier j is also sleeved on the fixed frame outside the sub-reflector d of the wide-angle lens.

technical field

[0001] The invention relates to a monitoring system, in particular to a synchronous monitoring dual-system optical imaging security telephoto lens for forest fire prevention. Background technique

[0002] The existing technology adopts a zoom optical system with a large zoom ratio. This optical system needs to satisfy the clear imaging of low-power and high-power lenses, and its manufacturing cost is very high. During the use of these two high-power focal lengths, low-power or high-power cannot be used for observation at the same time, but can only be observed from low-power to high-power zoom or high-power to low-power zoom. Most surveillance lenses use zoom lenses, from wide-angle lenses to telephoto lenses, but the larger the ratio of the maximum focal length to the minimum focal length of the wide-angle and telephoto lenses, the more difficult the design of the entire optical path and the higher the processing cost. In order to achieve wide-angle and tele...

Examples

Embodiment 1

[0025] Such as figure 2 As shown, a hole is punched in the center of the first (group) glass of the existing telephoto lens (ie, the main objective lens a of the telephoto lens), and the objective lens group of the wide-angle lens is fixed in the fixing frame k; the objective lens group of the wide-angle lens will be installed The fixing frame of the fixed frame is set on the hole, so that the objective lens b of the wide-angle lens is coaxial with the main objective lens a of the telephoto lens. An aperture j is also sleeved on the fixed frame outside the sub-reflector d of the telephoto lens.

Embodiment 2

[0027] Such as image 3 As shown, in the center of the front and back of the first piece (group) of glass of the telephoto lens (that is, the main objective lens a of the telephoto lens), a wide-angle lens objective lens b1 and b2 are respectively set (pasted or integrally formed or otherwise combined), A wide-angle lens objective lens b2, a reflector e, and a telephoto lens sub-reflector d are sequentially arranged in the fixed frame; an aperture j is sheathed on the fixed frame outside the telephoto lens sub-reflector d.

Embodiment 3

[0029] Such as Figure 4 As shown, in the center of the back of the first piece (group) of glass of the telephoto lens (that is, the main objective lens of the telephoto lens a), there is a wide-angle lens objective lens b, and the wide-angle lens objective lens The group is arranged in the fixed frame, and the light barrier j is also sleeved on the fixed frame outside the sub-reflector d of the wide-angle lens.

Images