Guangdong Hongjing Optoelectronic Technology Inc.

Mileseey Technology, Inc.

Hongfei Wang

Jian Ding

Zhi Chou

Weiming Li

Zhenting Liu

Jiajun Liu

Zhinong Fu

Xiaoling Yin

Honghai Liu

Aiping Xi

A large-aperture, high-pixel optical system has six lenses arranged successively from its object side to its image side along its optic axis. The first lens has a convex surface facing the object side and a concave surface facing the image side; The third lens is biconcave; the second and fifth lenses are biconvex; the fourth and sixth lenses each have a concave surface facing the object side and a convex surface facing the image side. The fifth lens and the sixth lens form a combined lens and the optical system satisfies TTL/EFL&#x2264;4.5. Also disclosed is a camera module using the system. The system and the module are mainly composed of six lenses. Since the number of lenses used is limited, the structure is simple.

Large-aperture, high-pixel optical system and camera module used thereby

The invention relates to the topographic technique field, and provides a ranging method and a system, wherein the ranging method comprises the following steps: modulating measured beam, by a modulated signal of which the frequency is continuously changed over time; emitting the modulated measured beam to a measured object; receiving the reflected measured beam and converting the beam into the measured signals; and comparing the frequency of the modulated signal generated when the measured beam is received with the frequency of the measured signals, thus determining the measured distance.

Ranging method and system

Growing community of inventors

Guangdong, China

Hongfei Wang