Optical lens

Abstract

The invention provides an optical lens. The optical lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element, wherein image-side surfaces and object-side surfaces of the first lens element, the second lens element, the third lens element and the fourth lens element are aspheric. Thus, the optical lenscan be applied to optical sensors of various intelligent devices based on the TOF technology, such as sweeping robots, laser radars and gesture recognition devices, and the optical performance requirements of the optical sensors are met.

Description

technical field [0001] The present invention relates to an optical system, and more particularly to a wide-angle optical lens for TOF smart devices. Background technique [0002] The diversification of smart devices has brought many conveniences to today's society, and its research and development has attracted more and more attention from all walks of life. Among the sensors of smart devices, the most important is the optical sensor that collects effective signals from the surroundings. Moreover, smart devices such as depth-sensing devices developed based on TOF modules (including but not limited to lidar, sweeping robots, etc.) are developing in the direction of mass production, miniaturization and civilian use. [0003] At present, TOF ranging technology (Time of Flight, Time of Flight) has been widely used in optical sensors of various smart devices such as gesture recognition, sweeping robots and lidar. In some practical applications, the optical sensor based on TOF r...

AI Technical Summary

Problems solved by technology

At the same time, in order to ensure no vignetting and balance the distortion relationship, the design requirements of the wide-angle optical lens based on TOF ranging are higher, and it is more difficult to meet the application requirements.

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