Longitudinal off-axis three-mirror optical system for vehicle-mounted head-up display device

Abstract

The invention discloses a longitudinal off-axis three-mirror optical system for a vehicle-mounted head-up display device. The longitudinal off-axis three-mirror optical system is characterized by comprising a luminescent screen, a minor reflector is arranged in the inclined front of the luminescent screen, a main reflector is arranged in the inclined front of the minor reflector, protective glassis arranged on the inclined upper portion of a main reflector, and a windshield is arranged above the protective glass. According to the longitudinal off-axis three-mirror optical system, an ideal imaging effect is achieved through reasonable angular deflection, in addition, the structure is compact, the space occupied by the whole vehicle-mounted display device is reduced, and the use requirementof a customer for a large space of an automobile is increased. Compared with a common HUD, the longitudinal off-axis three-mirror optical system has the advantages that the distortion of all fields of view is controlled better, the distortion of all the fields of view in the meridian direction and the sagittal direction in a distortion network are relatively small, and therefore the use effect ofhigh quality is guaranteed.

Description

【Technical field】 [0001] The invention relates to a longitudinal off-axis three-mirror optical system for a vehicle-mounted head-up display device. 【Background technique】 [0002] With the development of science and technology, the automotive industry is undergoing rapid changes. At the same time, automotive safety issues are becoming more and more important. It can prevent drivers from looking down at the vehicle instrument information and causing their eyes to leave the front. The vehicle head-up display device (HUD) has been widely used Used in the automotive field. It mainly projects the picture of the luminous screen on the windshield through the reflection in the optical system, so that the driver can read the information in the instrument without shifting his sight, thus greatly improving the safety of driving. [0003] Although the current HUDs on the market have achieved good imaging quality, it is difficult to ensure a wide range of eye box diameters, that is, the...

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Problems solved by technology

[0003] Although the current HUDs on the market have achieved good imaging quality, it is difficult to ensure a wide range of eye box diameters, that is, the range that the human eye can use is only fixed in a small space. When moving, the picture will appear blurred

At the same time, when the speed of the car changes and the human eye moves back and forth, the focus will shift, which will also cause poor imaging quality.

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