Vehicle-mounted prime lens

A fixed-focus lens and lens technology, applied in optical components, instruments, optics, etc., can solve the problems of large size, inconvenient installation in the car, and the driver being stared at

Active Publication Date: 2021-09-10
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary optical lenses may also have the problem of large size, which is inconvenient to install in the car, and may also cause the driver to feel that he is being stared at, causing discomf

Method used

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  • Vehicle-mounted prime lens
  • Vehicle-mounted prime lens
  • Vehicle-mounted prime lens

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] Please see figure 1 , is the structural diagram of the optical system of the present invention, the vehicle-mounted fixed-focus lens includes 4 lenses, and the 4 lenses are arranged in the form of negative, positive, and negative, and the 4 lenses include the first negative lens arranged coaxially along the incident ...

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Abstract

The invention discloses a vehicle-mounted prime lens which comprises four lenses and a piece of plate glass. The lenses are sequentially a negative lens, a positive lens, a negative lens and a negative lens in the light incidence direction. The focal length of the lens is 5.4 mm, the F number is 2.1, the field angle is 60 degrees, and the total optical length of the system is 12.88 mm. The lens works in a visible light wave band and mainly can be used as a vehicle-mounted lens to monitor driving behaviors of a driver and remind the driver to avoid distraction driving in time; in the design process of the lens, the cost factor is fully considered, and only four optical lenses including one aspherical lens and three spherical lenses are adopted; and in the lens design process, various aberrations are strictly corrected and controlled, and the final lens has the advantages of low cost, excellent image quality, large relative aperture and miniaturization.

Description

technical field [0001] The invention relates to the technical field of optical design, in particular to a vehicle-mounted fixed-focus lens. Background technique [0002] Continuous driving for a long time may lead to a decrease in the driver's attention, slow response, and even distracted driving, which seriously threatens driving safety. Therefore generally require the driver to stop and rest for a period of time after continuous driving for several hours to ensure sufficient energy. However, in many cases, drivers often reduce their rest time in order to improve transportation efficiency, but they do not realize that they are already driving fatigued, which leads to serious driving hazards. It will be of great significance to driving safety if the driver's driving behavior can be monitored in real time through an optical lens, and suggestions for stopping and resting can be put forward in time according to his driving state. [0003] The alignment plane of many optical l...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B1/00
CPCG02B13/004G02B1/00G03B30/00
Inventor 陈建军李雪
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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