A large relative aperture low-light TV imaging pre-objective optical system
An optical system and relative aperture technology, applied in optics, optical components, instruments, etc., can solve the problems of low light-gathering ability and small relative aperture, and achieve the effect of small length and volume, reducing the difficulty of assembly and adjustment, and less quantity.
Active Publication Date: 2022-07-26
凯迈(洛阳)测控有限公司
View PDF17 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] In order to solve the technical problems of small relative aperture and low light-gathering ability of the traditional low-light TV imaging pre-objective optical system, the present invention provides a large field of view and large relative aperture front-end objective optical system for low-light TV imaging systems , which is used to image the target illuminated by weak natural light such as starlight, moonlight and atmospheric glow on the image intensifier, which can effectively improve the light-gathering ability of the low-light TV imaging system for weak light and the sensitivity of the system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.
[0033] like figure 2 As shown in the figure, a large relative aperture low-light TV imaging front objective lens optical system is arranged in front of the image intensifier 10 and imaged on the cathode surface of the image intensifier 10. Meniscus negative lens 1, first meniscus positive lens 2, double concave negative lens 3, first double convex positive lens 4, second double convex positive lens 5, third double convex positive lens 6, chromatic aberration correction lens group and the second meniscus negative lens 9. The chromatic aberration correction lens group is formed by cementing a fourth biconvex positive lens 7 and a second meniscus positive lens 8. The first meniscus negative lens 1 and the first meniscus positive lens 2 are all bent toward the image Both the meniscus-shaped positive lens 8 and the second meniscus-shaped negative lens 9...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A large relative aperture low-light TV imaging front objective lens optical system is arranged in front of the cathode surface of the image intensifier, and along the propagation direction of the light, a first meniscus negative lens and a first meniscus positive lens are coaxially arranged in sequence , a double concave negative lens, a first double convex positive lens, a second double convex positive lens, a third double convex positive lens, a chromatic aberration correction lens group and a third meniscus negative lens. The invention provides a large field of view and large relative aperture front objective lens optical system for a low-light TV imaging system, the field of view is 50°, the relative aperture is 1:1.0; the T number of the objective lens is less than or equal to 1.2, and the optical length is less than 55mm. It effectively improves the light-gathering ability of weak light and the sensitivity of the system, and is used to image the target illuminated by weak natural light (such as starlight, moonlight and atmospheric glow) on the cathode surface of the image intensifier.
Description
technical field [0001] The invention belongs to the technical field of low-light television imaging systems, and in particular relates to a large relative aperture low-light television imaging front objective lens optical system. Background technique [0002] The low-light TV imaging system is a technology that uses starlight, moonlight and atmospheric glow to be reflected from the target surface and then focused on the photocathode surface of the image intensifier through the front objective lens, and uses the image intensifier device to enhance and amplify the light radiation signal of the dim target. It is convenient for night observation. [0003] The low-light TV system plays an important role in the military field. Through the low-light TV system, the frontline soldiers can clearly see the movement of the enemy at night, and the video can be transmitted to the command center located behind the front line. Therefore, it is of great significance to study the low-light T...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/16
CPCG02B13/16
Inventor 吴海清刘志广王宗俐丁利伟谈大伟卢延婷
Owner 凯迈(洛阳)测控有限公司