Lateral off-axis three-reflex optical system for vehicle-mounted head-up display device

Abstract

The invention discloses a lateral off-axis three-reflex optical system for a vehicle-mounted head-up display device. The system is characterized by comprising a light-emitting screen; a secondary reflecting mirror is arranged in oblique front of the light-emitting screen; and a primary reflecting mirror is arranged in oblique front of the secondary reflecting mirror. The primary reflecting mirroris a concave reflecting mirror with a positive focal power and is made of a plastic material. The secondary reflecting mirror is a reflecting mirror without focal power. During the design process, theentrance pupil deviation is carried out in an X direction and a Y direction; and nine different entrance pupil positions are optimized. On the basis of the optimized design, the large eye case diameter is ensured and the available eye base diameter can reach 130nm to 160nm; and when the body moves slightly, the image definition is not affected.

Description

【Technical field】 [0001] The invention relates to a lateral 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 automobile industry is undergoing rapid changes. At the same time, automobile safety issues are becoming more and more important. It can prevent the driver from looking down at the vehicle instrument information and causing the sight to leave the front vehicle head-up display device (HUD). , HUD has been widely 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 better imaging quality, the number of optical components used is large, which increases the cost of p...

AI Technical Summary

Problems solved by technology

[0003] Although the current HUDs on the market have achieved good imaging quality, the number of optical components used is large, which increases the cost of processing and materials, and the entire device occupies a large space, and it is difficult to ensure a wide range of eye box diameters, that is, The usable range of the human eye is only fixed in a small space range. When the body moves up, down, left, and right, 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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